AMDGPU/GlobalISel: Legalize fast unsafe FDIV

Reviewers: arsenm

Reviewed By: arsenm

Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, rovka, dstuttard, tpr, t-tye, hiraditya, Petar.Avramovic, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D69231

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375460 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 798 insertions, 0 deletions

diff --git a/test/CodeGen/AMDGPU/GlobalISel/legalize-fast-unsafe-fdiv.mir b/test/CodeGen/AMDGPU/GlobalISel/legalize-fast-unsafe-fdiv.mir
new file mode 100644
index 00000000000..cada37c8919
--- /dev/null
+++ b/test/CodeGen/AMDGPU/GlobalISel/legalize-fast-unsafe-fdiv.mir
@@ -0,0 +1,798 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer  -global-isel-abort=0 %s -o - | FileCheck -check-prefix=SI  %s
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer  -global-isel-abort=0 %s -o - | FileCheck -check-prefix=VI  %s
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -run-pass=legalizer -global-isel-abort=0 -o - %s | FileCheck -check-prefix=GFX9 %s
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -run-pass=legalizer -enable-unsafe-fp-math -global-isel-abort=0 -o - %s | FileCheck -check-prefix=GFX9-UNSAFE %s
+
+---
+name: test_fast_unsafe_fdiv_s16
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s16
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; SI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; SI: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; SI: [[FPEXT:%[0-9]+]]:_(s32) = G_FPEXT [[TRUNC]](s16)
+    ; SI: [[FPEXT1:%[0-9]+]]:_(s32) = G_FPEXT [[TRUNC1]](s16)
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[FPEXT]], [[FPEXT1]]
+    ; SI: [[FPTRUNC:%[0-9]+]]:_(s16) = G_FPTRUNC [[FDIV]](s32)
+    ; SI: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[FPTRUNC]](s16)
+    ; SI: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s16
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; VI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; VI: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; VI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[TRUNC]], [[TRUNC1]]
+    ; VI: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[FDIV]](s16)
+    ; VI: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[TRUNC]], [[TRUNC1]]
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[FDIV]](s16)
+    ; GFX9: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s16
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9-UNSAFE: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9-UNSAFE: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC1]](s16)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC]], [[INT]]
+    ; GFX9-UNSAFE: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[FMUL]](s16)
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[ANYEXT]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s16) = G_TRUNC %0
+    %3:_(s16) = G_TRUNC %1
+    %4:_(s16) = G_FDIV %2, %3
+    %5:_(s32) = G_ANYEXT %4
+    $vgpr0 = COPY %5
+...
+
+---
+name: test_fast_unsafe_fdiv_s32
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s32
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[COPY]], [[COPY1]]
+    ; SI: $vgpr0 = COPY [[FDIV]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s32
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; VI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[COPY]], [[COPY1]]
+    ; VI: $vgpr0 = COPY [[FDIV]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[COPY]], [[COPY1]]
+    ; GFX9: $vgpr0 = COPY [[FDIV]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s32
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY1]](s32)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s32) = G_FMUL [[COPY]], [[INT]]
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[FMUL]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s32) = G_FDIV %0, %1
+    $vgpr0 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_s32_arcp
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s32_arcp
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; SI: [[INT:%[0-9]+]]:_(s32) = arcp G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY1]](s32)
+    ; SI: [[FMUL:%[0-9]+]]:_(s32) = arcp G_FMUL [[COPY]], [[INT]]
+    ; SI: $vgpr0 = COPY [[FMUL]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s32_arcp
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; VI: [[INT:%[0-9]+]]:_(s32) = arcp G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY1]](s32)
+    ; VI: [[FMUL:%[0-9]+]]:_(s32) = arcp G_FMUL [[COPY]], [[INT]]
+    ; VI: $vgpr0 = COPY [[FMUL]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s32_arcp
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[INT:%[0-9]+]]:_(s32) = arcp G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY1]](s32)
+    ; GFX9: [[FMUL:%[0-9]+]]:_(s32) = arcp G_FMUL [[COPY]], [[INT]]
+    ; GFX9: $vgpr0 = COPY [[FMUL]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s32_arcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = arcp G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY1]](s32)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s32) = arcp G_FMUL [[COPY]], [[INT]]
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[FMUL]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s32) = arcp G_FDIV %0, %1
+    $vgpr0 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_s64
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s64
+    ; SI: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
+    ; SI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[COPY]], [[COPY1]]
+    ; SI: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s64
+    ; VI: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
+    ; VI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[COPY]], [[COPY1]]
+    ; VI: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s64
+    ; GFX9: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[COPY]], [[COPY1]]
+    ; GFX9: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s64
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s64) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY1]](s64)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s64) = G_FMUL [[COPY]], [[INT]]
+    ; GFX9-UNSAFE: $vgpr0_vgpr1 = COPY [[FMUL]](s64)
+    %0:_(s64) = COPY $vgpr0_vgpr1
+    %1:_(s64) = COPY $vgpr2_vgpr3
+    %2:_(s64) = G_FDIV %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v2s32
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v2s32
+    ; SI: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; SI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; SI: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[UV]], [[UV2]]
+    ; SI: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[UV1]], [[UV3]]
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v2s32
+    ; VI: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; VI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; VI: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[UV]], [[UV2]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[UV1]], [[UV3]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v2s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[UV]], [[UV2]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[UV1]], [[UV3]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v2s32
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9-UNSAFE: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9-UNSAFE: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV2]](s32)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s32) = G_FMUL [[UV]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV3]](s32)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s32) = G_FMUL [[UV1]], [[INT1]]
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FMUL]](s32), [[FMUL1]](s32)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    %0:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    %1:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    %2:_(<2 x s32>) = G_FDIV %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v2s32_flags
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v2s32_flags
+    ; SI: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; SI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; SI: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = nnan G_FDIV [[UV]], [[UV2]]
+    ; SI: [[FDIV1:%[0-9]+]]:_(s32) = nnan G_FDIV [[UV1]], [[UV3]]
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v2s32_flags
+    ; VI: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; VI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; VI: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s32) = nnan G_FDIV [[UV]], [[UV2]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s32) = nnan G_FDIV [[UV1]], [[UV3]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v2s32_flags
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s32) = nnan G_FDIV [[UV]], [[UV2]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s32) = nnan G_FDIV [[UV1]], [[UV3]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v2s32_flags
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9-UNSAFE: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9-UNSAFE: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = nnan G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV2]](s32)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s32) = nnan G_FMUL [[UV]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s32) = nnan G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV3]](s32)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s32) = nnan G_FMUL [[UV1]], [[INT1]]
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[FMUL]](s32), [[FMUL1]](s32)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    %0:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    %1:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    %2:_(<2 x s32>) = nnan G_FDIV %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v3s32
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1_vgpr2, $vgpr3_vgpr4_vgpr5
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v3s32
+    ; SI: [[COPY:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr0_vgpr1_vgpr2
+    ; SI: [[COPY1:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr3_vgpr4_vgpr5
+    ; SI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<3 x s32>)
+    ; SI: [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<3 x s32>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[UV]], [[UV3]]
+    ; SI: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[UV1]], [[UV4]]
+    ; SI: [[FDIV2:%[0-9]+]]:_(s32) = G_FDIV [[UV2]], [[UV5]]
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32), [[FDIV2]](s32)
+    ; SI: $vgpr0_vgpr1_vgpr2 = COPY [[BUILD_VECTOR]](<3 x s32>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v3s32
+    ; VI: [[COPY:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr0_vgpr1_vgpr2
+    ; VI: [[COPY1:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr3_vgpr4_vgpr5
+    ; VI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<3 x s32>)
+    ; VI: [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<3 x s32>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[UV]], [[UV3]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[UV1]], [[UV4]]
+    ; VI: [[FDIV2:%[0-9]+]]:_(s32) = G_FDIV [[UV2]], [[UV5]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32), [[FDIV2]](s32)
+    ; VI: $vgpr0_vgpr1_vgpr2 = COPY [[BUILD_VECTOR]](<3 x s32>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v3s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr0_vgpr1_vgpr2
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr3_vgpr4_vgpr5
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<3 x s32>)
+    ; GFX9: [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<3 x s32>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[UV]], [[UV3]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[UV1]], [[UV4]]
+    ; GFX9: [[FDIV2:%[0-9]+]]:_(s32) = G_FDIV [[UV2]], [[UV5]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s32>) = G_BUILD_VECTOR [[FDIV]](s32), [[FDIV1]](s32), [[FDIV2]](s32)
+    ; GFX9: $vgpr0_vgpr1_vgpr2 = COPY [[BUILD_VECTOR]](<3 x s32>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v3s32
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr0_vgpr1_vgpr2
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(<3 x s32>) = COPY $vgpr3_vgpr4_vgpr5
+    ; GFX9-UNSAFE: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<3 x s32>)
+    ; GFX9-UNSAFE: [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<3 x s32>)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV3]](s32)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s32) = G_FMUL [[UV]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV4]](s32)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s32) = G_FMUL [[UV1]], [[INT1]]
+    ; GFX9-UNSAFE: [[INT2:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV5]](s32)
+    ; GFX9-UNSAFE: [[FMUL2:%[0-9]+]]:_(s32) = G_FMUL [[UV2]], [[INT2]]
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s32>) = G_BUILD_VECTOR [[FMUL]](s32), [[FMUL1]](s32), [[FMUL2]](s32)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1_vgpr2 = COPY [[BUILD_VECTOR]](<3 x s32>)
+    %0:_(<3 x s32>) = COPY $vgpr0_vgpr1_vgpr2
+    %1:_(<3 x s32>) = COPY $vgpr3_vgpr4_vgpr5
+    %2:_(<3 x s32>) = G_FDIV %0, %1
+    $vgpr0_vgpr1_vgpr2 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v2s64
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1_vgpr2_vgpr3, $vgpr4_vgpr5_vgpr6_vgpr7
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v2s64
+    ; SI: [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr0_vgpr1_vgpr2_vgpr3
+    ; SI: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr4_vgpr5_vgpr6_vgpr7
+    ; SI: [[UV:%[0-9]+]]:_(s64), [[UV1:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY]](<2 x s64>)
+    ; SI: [[UV2:%[0-9]+]]:_(s64), [[UV3:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY1]](<2 x s64>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[UV]], [[UV2]]
+    ; SI: [[FDIV1:%[0-9]+]]:_(s64) = G_FDIV [[UV1]], [[UV3]]
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s64>) = G_BUILD_VECTOR [[FDIV]](s64), [[FDIV1]](s64)
+    ; SI: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[BUILD_VECTOR]](<2 x s64>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v2s64
+    ; VI: [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr0_vgpr1_vgpr2_vgpr3
+    ; VI: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr4_vgpr5_vgpr6_vgpr7
+    ; VI: [[UV:%[0-9]+]]:_(s64), [[UV1:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY]](<2 x s64>)
+    ; VI: [[UV2:%[0-9]+]]:_(s64), [[UV3:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY1]](<2 x s64>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[UV]], [[UV2]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s64) = G_FDIV [[UV1]], [[UV3]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s64>) = G_BUILD_VECTOR [[FDIV]](s64), [[FDIV1]](s64)
+    ; VI: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[BUILD_VECTOR]](<2 x s64>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v2s64
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr0_vgpr1_vgpr2_vgpr3
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr4_vgpr5_vgpr6_vgpr7
+    ; GFX9: [[UV:%[0-9]+]]:_(s64), [[UV1:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY]](<2 x s64>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s64), [[UV3:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY1]](<2 x s64>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[UV]], [[UV2]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s64) = G_FDIV [[UV1]], [[UV3]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s64>) = G_BUILD_VECTOR [[FDIV]](s64), [[FDIV1]](s64)
+    ; GFX9: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[BUILD_VECTOR]](<2 x s64>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v2s64
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr0_vgpr1_vgpr2_vgpr3
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr4_vgpr5_vgpr6_vgpr7
+    ; GFX9-UNSAFE: [[UV:%[0-9]+]]:_(s64), [[UV1:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY]](<2 x s64>)
+    ; GFX9-UNSAFE: [[UV2:%[0-9]+]]:_(s64), [[UV3:%[0-9]+]]:_(s64) = G_UNMERGE_VALUES [[COPY1]](<2 x s64>)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s64) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV2]](s64)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s64) = G_FMUL [[UV]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s64) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[UV3]](s64)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s64) = G_FMUL [[UV1]], [[INT1]]
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s64>) = G_BUILD_VECTOR [[FMUL]](s64), [[FMUL1]](s64)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[BUILD_VECTOR]](<2 x s64>)
+    %0:_(<2 x s64>) = COPY $vgpr0_vgpr1_vgpr2_vgpr3
+    %1:_(<2 x s64>) = COPY $vgpr4_vgpr5_vgpr6_vgpr7
+    %2:_(<2 x s64>) = G_FDIV %0, %1
+    $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v2s16
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v2s16
+    ; SI: [[COPY:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr0
+    ; SI: [[COPY1:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr1
+    ; SI: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY]](<2 x s16>)
+    ; SI: [[UV2:%[0-9]+]]:_(s16), [[UV3:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY1]](<2 x s16>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV2]]
+    ; SI: [[FPEXT:%[0-9]+]]:_(s32) = G_FPEXT [[UV1]](s16)
+    ; SI: [[FPEXT1:%[0-9]+]]:_(s32) = G_FPEXT [[UV3]](s16)
+    ; SI: [[FDIV1:%[0-9]+]]:_(s32) = G_FDIV [[FPEXT]], [[FPEXT1]]
+    ; SI: [[FPTRUNC:%[0-9]+]]:_(s16) = G_FPTRUNC [[FDIV1]](s32)
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FPTRUNC]](s16)
+    ; SI: $vgpr0 = COPY [[BUILD_VECTOR]](<2 x s16>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v2s16
+    ; VI: [[COPY:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr0
+    ; VI: [[COPY1:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr1
+    ; VI: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY]](<2 x s16>)
+    ; VI: [[UV2:%[0-9]+]]:_(s16), [[UV3:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY1]](<2 x s16>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV2]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV3]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16)
+    ; VI: $vgpr0 = COPY [[BUILD_VECTOR]](<2 x s16>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v2s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr1
+    ; GFX9: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY]](<2 x s16>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s16), [[UV3:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY1]](<2 x s16>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV2]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV3]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16)
+    ; GFX9: $vgpr0 = COPY [[BUILD_VECTOR]](<2 x s16>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v2s16
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(<2 x s16>) = COPY $vgpr1
+    ; GFX9-UNSAFE: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[COPY]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST]](s32)
+    ; GFX9-UNSAFE: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9-UNSAFE: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX9-UNSAFE: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[COPY1]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST1]](s32)
+    ; GFX9-UNSAFE: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR1]](s32)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC2]](s16)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC3]](s16)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC1]], [[INT1]]
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FMUL]](s16), [[FMUL1]](s16)
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[BUILD_VECTOR]](<2 x s16>)
+    %0:_(<2 x s16>) = COPY $vgpr0
+    %1:_(<2 x s16>) = COPY $vgpr1
+    %2:_(<2 x s16>) = G_FDIV %0, %1
+    $vgpr0 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v3s16
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v3s16
+    ; SI: [[DEF:%[0-9]+]]:_(<3 x s16>) = G_IMPLICIT_DEF
+    ; SI: [[DEF1:%[0-9]+]]:_(<3 x s16>) = G_IMPLICIT_DEF
+    ; SI: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16), [[UV2:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[DEF]](<3 x s16>)
+    ; SI: [[UV3:%[0-9]+]]:_(s16), [[UV4:%[0-9]+]]:_(s16), [[UV5:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[DEF1]](<3 x s16>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV3]]
+    ; SI: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV4]]
+    ; SI: [[FPEXT:%[0-9]+]]:_(s32) = G_FPEXT [[UV2]](s16)
+    ; SI: [[FPEXT1:%[0-9]+]]:_(s32) = G_FPEXT [[UV5]](s16)
+    ; SI: [[FDIV2:%[0-9]+]]:_(s32) = G_FDIV [[FPEXT]], [[FPEXT1]]
+    ; SI: [[FPTRUNC:%[0-9]+]]:_(s16) = G_FPTRUNC [[FDIV2]](s32)
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16), [[FPTRUNC]](s16)
+    ; SI: S_NOP 0, implicit [[BUILD_VECTOR]](<3 x s16>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v3s16
+    ; VI: [[DEF:%[0-9]+]]:_(<3 x s16>) = G_IMPLICIT_DEF
+    ; VI: [[DEF1:%[0-9]+]]:_(<3 x s16>) = G_IMPLICIT_DEF
+    ; VI: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16), [[UV2:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[DEF]](<3 x s16>)
+    ; VI: [[UV3:%[0-9]+]]:_(s16), [[UV4:%[0-9]+]]:_(s16), [[UV5:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[DEF1]](<3 x s16>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV3]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV4]]
+    ; VI: [[FDIV2:%[0-9]+]]:_(s16) = G_FDIV [[UV2]], [[UV5]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16), [[FDIV2]](s16)
+    ; VI: S_NOP 0, implicit [[BUILD_VECTOR]](<3 x s16>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v3s16
+    ; GFX9: [[DEF:%[0-9]+]]:_(<3 x s16>) = G_IMPLICIT_DEF
+    ; GFX9: [[DEF1:%[0-9]+]]:_(<3 x s16>) = G_IMPLICIT_DEF
+    ; GFX9: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16), [[UV2:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[DEF]](<3 x s16>)
+    ; GFX9: [[UV3:%[0-9]+]]:_(s16), [[UV4:%[0-9]+]]:_(s16), [[UV5:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[DEF1]](<3 x s16>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV3]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV4]]
+    ; GFX9: [[FDIV2:%[0-9]+]]:_(s16) = G_FDIV [[UV2]], [[UV5]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16), [[FDIV2]](s16)
+    ; GFX9: S_NOP 0, implicit [[BUILD_VECTOR]](<3 x s16>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v3s16
+    ; GFX9-UNSAFE: [[DEF:%[0-9]+]]:_(<4 x s16>) = G_IMPLICIT_DEF
+    ; GFX9-UNSAFE: [[EXTRACT:%[0-9]+]]:_(<3 x s16>) = G_EXTRACT [[DEF]](<4 x s16>), 0
+    ; GFX9-UNSAFE: [[DEF1:%[0-9]+]]:_(<4 x s16>) = G_IMPLICIT_DEF
+    ; GFX9-UNSAFE: [[EXTRACT1:%[0-9]+]]:_(<3 x s16>) = G_EXTRACT [[DEF1]](<4 x s16>), 0
+    ; GFX9-UNSAFE: [[DEF2:%[0-9]+]]:_(<4 x s16>) = G_IMPLICIT_DEF
+    ; GFX9-UNSAFE: [[INSERT:%[0-9]+]]:_(<4 x s16>) = G_INSERT [[DEF2]], [[EXTRACT]](<3 x s16>), 0
+    ; GFX9-UNSAFE: [[UV:%[0-9]+]]:_(<2 x s16>), [[UV1:%[0-9]+]]:_(<2 x s16>) = G_UNMERGE_VALUES [[INSERT]](<4 x s16>)
+    ; GFX9-UNSAFE: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[UV]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST]](s32)
+    ; GFX9-UNSAFE: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9-UNSAFE: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX9-UNSAFE: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[UV1]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST1]](s32)
+    ; GFX9-UNSAFE: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C]](s32)
+    ; GFX9-UNSAFE: [[DEF3:%[0-9]+]]:_(<4 x s16>) = G_IMPLICIT_DEF
+    ; GFX9-UNSAFE: [[INSERT1:%[0-9]+]]:_(<4 x s16>) = G_INSERT [[DEF3]], [[EXTRACT1]](<3 x s16>), 0
+    ; GFX9-UNSAFE: [[UV2:%[0-9]+]]:_(<2 x s16>), [[UV3:%[0-9]+]]:_(<2 x s16>) = G_UNMERGE_VALUES [[INSERT1]](<4 x s16>)
+    ; GFX9-UNSAFE: [[BITCAST2:%[0-9]+]]:_(s32) = G_BITCAST [[UV2]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST2]](s32)
+    ; GFX9-UNSAFE: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST2]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR2]](s32)
+    ; GFX9-UNSAFE: [[BITCAST3:%[0-9]+]]:_(s32) = G_BITCAST [[UV3]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST3]](s32)
+    ; GFX9-UNSAFE: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST3]], [[C]](s32)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC3]](s16)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC4]](s16)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC1]], [[INT1]]
+    ; GFX9-UNSAFE: [[INT2:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC5]](s16)
+    ; GFX9-UNSAFE: [[FMUL2:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC2]], [[INT2]]
+    ; GFX9-UNSAFE: [[DEF4:%[0-9]+]]:_(s16) = G_IMPLICIT_DEF
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FMUL]](s16), [[FMUL1]](s16)
+    ; GFX9-UNSAFE: [[BUILD_VECTOR1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FMUL2]](s16), [[DEF4]](s16)
+    ; GFX9-UNSAFE: [[CONCAT_VECTORS:%[0-9]+]]:_(<4 x s16>) = G_CONCAT_VECTORS [[BUILD_VECTOR]](<2 x s16>), [[BUILD_VECTOR1]](<2 x s16>)
+    ; GFX9-UNSAFE: [[EXTRACT2:%[0-9]+]]:_(<3 x s16>) = G_EXTRACT [[CONCAT_VECTORS]](<4 x s16>), 0
+    ; GFX9-UNSAFE: S_NOP 0, implicit [[EXTRACT2]](<3 x s16>)
+    %0:_(<3 x s16>) = G_IMPLICIT_DEF
+    %1:_(<3 x s16>) = G_IMPLICIT_DEF
+    %2:_(<3 x s16>) = G_FDIV %0, %1
+    S_NOP 0, implicit %2
+...
+
+---
+name: test_fast_unsafe_fdiv_v4s16
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_v4s16
+    ; SI: [[COPY:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr2_vgpr3
+    ; SI: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16), [[UV2:%[0-9]+]]:_(s16), [[UV3:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY]](<4 x s16>)
+    ; SI: [[UV4:%[0-9]+]]:_(s16), [[UV5:%[0-9]+]]:_(s16), [[UV6:%[0-9]+]]:_(s16), [[UV7:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY1]](<4 x s16>)
+    ; SI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV4]]
+    ; SI: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV5]]
+    ; SI: [[FDIV2:%[0-9]+]]:_(s16) = G_FDIV [[UV2]], [[UV6]]
+    ; SI: [[FPEXT:%[0-9]+]]:_(s32) = G_FPEXT [[UV3]](s16)
+    ; SI: [[FPEXT1:%[0-9]+]]:_(s32) = G_FPEXT [[UV7]](s16)
+    ; SI: [[FDIV3:%[0-9]+]]:_(s32) = G_FDIV [[FPEXT]], [[FPEXT1]]
+    ; SI: [[FPTRUNC:%[0-9]+]]:_(s16) = G_FPTRUNC [[FDIV3]](s32)
+    ; SI: [[BUILD_VECTOR:%[0-9]+]]:_(<4 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16), [[FDIV2]](s16), [[FPTRUNC]](s16)
+    ; SI: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<4 x s16>)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_v4s16
+    ; VI: [[COPY:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr2_vgpr3
+    ; VI: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16), [[UV2:%[0-9]+]]:_(s16), [[UV3:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY]](<4 x s16>)
+    ; VI: [[UV4:%[0-9]+]]:_(s16), [[UV5:%[0-9]+]]:_(s16), [[UV6:%[0-9]+]]:_(s16), [[UV7:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY1]](<4 x s16>)
+    ; VI: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV4]]
+    ; VI: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV5]]
+    ; VI: [[FDIV2:%[0-9]+]]:_(s16) = G_FDIV [[UV2]], [[UV6]]
+    ; VI: [[FDIV3:%[0-9]+]]:_(s16) = G_FDIV [[UV3]], [[UV7]]
+    ; VI: [[BUILD_VECTOR:%[0-9]+]]:_(<4 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16), [[FDIV2]](s16), [[FDIV3]](s16)
+    ; VI: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<4 x s16>)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_v4s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s16), [[UV1:%[0-9]+]]:_(s16), [[UV2:%[0-9]+]]:_(s16), [[UV3:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY]](<4 x s16>)
+    ; GFX9: [[UV4:%[0-9]+]]:_(s16), [[UV5:%[0-9]+]]:_(s16), [[UV6:%[0-9]+]]:_(s16), [[UV7:%[0-9]+]]:_(s16) = G_UNMERGE_VALUES [[COPY1]](<4 x s16>)
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s16) = G_FDIV [[UV]], [[UV4]]
+    ; GFX9: [[FDIV1:%[0-9]+]]:_(s16) = G_FDIV [[UV1]], [[UV5]]
+    ; GFX9: [[FDIV2:%[0-9]+]]:_(s16) = G_FDIV [[UV2]], [[UV6]]
+    ; GFX9: [[FDIV3:%[0-9]+]]:_(s16) = G_FDIV [[UV3]], [[UV7]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<4 x s16>) = G_BUILD_VECTOR [[FDIV]](s16), [[FDIV1]](s16), [[FDIV2]](s16), [[FDIV3]](s16)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<4 x s16>)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_v4s16
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr0_vgpr1
+    ; GFX9-UNSAFE: [[COPY1:%[0-9]+]]:_(<4 x s16>) = COPY $vgpr2_vgpr3
+    ; GFX9-UNSAFE: [[UV:%[0-9]+]]:_(<2 x s16>), [[UV1:%[0-9]+]]:_(<2 x s16>) = G_UNMERGE_VALUES [[COPY]](<4 x s16>)
+    ; GFX9-UNSAFE: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[UV]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST]](s32)
+    ; GFX9-UNSAFE: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9-UNSAFE: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX9-UNSAFE: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[UV1]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST1]](s32)
+    ; GFX9-UNSAFE: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR1]](s32)
+    ; GFX9-UNSAFE: [[UV2:%[0-9]+]]:_(<2 x s16>), [[UV3:%[0-9]+]]:_(<2 x s16>) = G_UNMERGE_VALUES [[COPY1]](<4 x s16>)
+    ; GFX9-UNSAFE: [[BITCAST2:%[0-9]+]]:_(s32) = G_BITCAST [[UV2]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST2]](s32)
+    ; GFX9-UNSAFE: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST2]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR2]](s32)
+    ; GFX9-UNSAFE: [[BITCAST3:%[0-9]+]]:_(s32) = G_BITCAST [[UV3]](<2 x s16>)
+    ; GFX9-UNSAFE: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST3]](s32)
+    ; GFX9-UNSAFE: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST3]], [[C]](s32)
+    ; GFX9-UNSAFE: [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR3]](s32)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC4]](s16)
+    ; GFX9-UNSAFE: [[FMUL:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC]], [[INT]]
+    ; GFX9-UNSAFE: [[INT1:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC5]](s16)
+    ; GFX9-UNSAFE: [[FMUL1:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC1]], [[INT1]]
+    ; GFX9-UNSAFE: [[INT2:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC6]](s16)
+    ; GFX9-UNSAFE: [[FMUL2:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC2]], [[INT2]]
+    ; GFX9-UNSAFE: [[INT3:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC7]](s16)
+    ; GFX9-UNSAFE: [[FMUL3:%[0-9]+]]:_(s16) = G_FMUL [[TRUNC3]], [[INT3]]
+    ; GFX9-UNSAFE: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FMUL]](s16), [[FMUL1]](s16)
+    ; GFX9-UNSAFE: [[BUILD_VECTOR1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[FMUL2]](s16), [[FMUL3]](s16)
+    ; GFX9-UNSAFE: [[CONCAT_VECTORS:%[0-9]+]]:_(<4 x s16>) = G_CONCAT_VECTORS [[BUILD_VECTOR]](<2 x s16>), [[BUILD_VECTOR1]](<2 x s16>)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1 = COPY [[CONCAT_VECTORS]](<4 x s16>)
+    %0:_(<4 x s16>) = COPY $vgpr0_vgpr1
+    %1:_(<4 x s16>) = COPY $vgpr2_vgpr3
+    %2:_(<4 x s16>) = G_FDIV %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_s16_constant_one_rcp
+body: |
+  bb.0:
+    liveins: $vgpr0
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s16_constant_one_rcp
+    ; SI: [[C:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xH3C00
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; SI: [[FPEXT:%[0-9]+]]:_(s32) = G_FPEXT [[C]](s16)
+    ; SI: [[FPEXT1:%[0-9]+]]:_(s32) = G_FPEXT [[TRUNC]](s16)
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[FPEXT]], [[FPEXT1]]
+    ; SI: [[FPTRUNC:%[0-9]+]]:_(s16) = G_FPTRUNC [[FDIV]](s32)
+    ; SI: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[FPTRUNC]](s16)
+    ; SI: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s16_constant_one_rcp
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; VI: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC]](s16)
+    ; VI: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[INT]](s16)
+    ; VI: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s16_constant_one_rcp
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC]](s16)
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[INT]](s16)
+    ; GFX9: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s16_constant_one_rcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[TRUNC]](s16)
+    ; GFX9-UNSAFE: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[INT]](s16)
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[ANYEXT]](s32)
+    %0:_(s16) = G_FCONSTANT half 1.0
+    %1:_(s32) = COPY $vgpr0
+    %2:_(s16) = G_TRUNC %1
+    %3:_(s16) = G_FDIV %0, %2
+    %4:_(s32) = G_ANYEXT %3
+    $vgpr0 = COPY %4
+...
+
+---
+name: test_fast_unsafe_fdiv_s16_constant_negative_one_rcp
+body: |
+  bb.0:
+    liveins: $vgpr0
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s16_constant_negative_one_rcp
+    ; SI: [[C:%[0-9]+]]:_(s16) = G_FCONSTANT half 0xHBC00
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; SI: [[FPEXT:%[0-9]+]]:_(s32) = G_FPEXT [[C]](s16)
+    ; SI: [[FPEXT1:%[0-9]+]]:_(s32) = G_FPEXT [[TRUNC]](s16)
+    ; SI: [[FDIV:%[0-9]+]]:_(s32) = G_FDIV [[FPEXT]], [[FPEXT1]]
+    ; SI: [[FPTRUNC:%[0-9]+]]:_(s16) = G_FPTRUNC [[FDIV]](s32)
+    ; SI: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[FPTRUNC]](s16)
+    ; SI: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s16_constant_negative_one_rcp
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; VI: [[FNEG:%[0-9]+]]:_(s16) = G_FNEG [[TRUNC]]
+    ; VI: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s16)
+    ; VI: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[INT]](s16)
+    ; VI: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s16_constant_negative_one_rcp
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[FNEG:%[0-9]+]]:_(s16) = G_FNEG [[TRUNC]]
+    ; GFX9: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s16)
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[INT]](s16)
+    ; GFX9: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s16_constant_negative_one_rcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9-UNSAFE: [[FNEG:%[0-9]+]]:_(s16) = G_FNEG [[TRUNC]]
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s16) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s16)
+    ; GFX9-UNSAFE: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[INT]](s16)
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[ANYEXT]](s32)
+    %0:_(s16) = G_FCONSTANT half -1.0
+    %1:_(s32) = COPY $vgpr0
+    %2:_(s16) = G_TRUNC %1
+    %3:_(s16) = G_FDIV %0, %2
+    %4:_(s32) = G_ANYEXT %3
+    $vgpr0 = COPY %4
+...
+
+---
+name: test_fast_unsafe_fdiv_s32_constant_one_rcp
+body: |
+  bb.0:
+    liveins: $vgpr0
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s32_constant_one_rcp
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY]](s32)
+    ; SI: $vgpr0 = COPY [[INT]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s32_constant_one_rcp
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY]](s32)
+    ; VI: $vgpr0 = COPY [[INT]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s32_constant_one_rcp
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY]](s32)
+    ; GFX9: $vgpr0 = COPY [[INT]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s32_constant_one_rcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY]](s32)
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[INT]](s32)
+    %0:_(s32) = G_FCONSTANT float 1.0
+    %1:_(s32) = COPY $vgpr0
+    %2:_(s32) = G_FDIV %0, %1
+    $vgpr0 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_s32_constant_negative_one_rcp
+body: |
+  bb.0:
+    liveins: $vgpr0
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s32_constant_negative_one_rcp
+    ; SI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; SI: [[FNEG:%[0-9]+]]:_(s32) = G_FNEG [[COPY]]
+    ; SI: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s32)
+    ; SI: $vgpr0 = COPY [[INT]](s32)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s32_constant_negative_one_rcp
+    ; VI: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; VI: [[FNEG:%[0-9]+]]:_(s32) = G_FNEG [[COPY]]
+    ; VI: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s32)
+    ; VI: $vgpr0 = COPY [[INT]](s32)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s32_constant_negative_one_rcp
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[FNEG:%[0-9]+]]:_(s32) = G_FNEG [[COPY]]
+    ; GFX9: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s32)
+    ; GFX9: $vgpr0 = COPY [[INT]](s32)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s32_constant_negative_one_rcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9-UNSAFE: [[FNEG:%[0-9]+]]:_(s32) = G_FNEG [[COPY]]
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s32) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s32)
+    ; GFX9-UNSAFE: $vgpr0 = COPY [[INT]](s32)
+    %0:_(s32) = G_FCONSTANT float -1.0
+    %1:_(s32) = COPY $vgpr0
+    %2:_(s32) = G_FDIV %0, %1
+    $vgpr0 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_s64_constant_one_rcp
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s64_constant_one_rcp
+    ; SI: [[C:%[0-9]+]]:_(s64) = G_FCONSTANT double 1.000000e+00
+    ; SI: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; SI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[C]], [[COPY]]
+    ; SI: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s64_constant_one_rcp
+    ; VI: [[C:%[0-9]+]]:_(s64) = G_FCONSTANT double 1.000000e+00
+    ; VI: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; VI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[C]], [[COPY]]
+    ; VI: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s64_constant_one_rcp
+    ; GFX9: [[C:%[0-9]+]]:_(s64) = G_FCONSTANT double 1.000000e+00
+    ; GFX9: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[C]], [[COPY]]
+    ; GFX9: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s64_constant_one_rcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s64) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[COPY]](s64)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1 = COPY [[INT]](s64)
+    %0:_(s64) = G_FCONSTANT double 1.0
+    %1:_(s64) = COPY $vgpr0_vgpr1
+    %2:_(s64) = G_FDIV %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...
+
+---
+name: test_fast_unsafe_fdiv_s64_constant_negative_one_rcp
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1
+
+    ; SI-LABEL: name: test_fast_unsafe_fdiv_s64_constant_negative_one_rcp
+    ; SI: [[C:%[0-9]+]]:_(s64) = G_FCONSTANT double -1.000000e+00
+    ; SI: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; SI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[C]], [[COPY]]
+    ; SI: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; VI-LABEL: name: test_fast_unsafe_fdiv_s64_constant_negative_one_rcp
+    ; VI: [[C:%[0-9]+]]:_(s64) = G_FCONSTANT double -1.000000e+00
+    ; VI: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; VI: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[C]], [[COPY]]
+    ; VI: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; GFX9-LABEL: name: test_fast_unsafe_fdiv_s64_constant_negative_one_rcp
+    ; GFX9: [[C:%[0-9]+]]:_(s64) = G_FCONSTANT double -1.000000e+00
+    ; GFX9: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9: [[FDIV:%[0-9]+]]:_(s64) = G_FDIV [[C]], [[COPY]]
+    ; GFX9: $vgpr0_vgpr1 = COPY [[FDIV]](s64)
+    ; GFX9-UNSAFE-LABEL: name: test_fast_unsafe_fdiv_s64_constant_negative_one_rcp
+    ; GFX9-UNSAFE: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9-UNSAFE: [[FNEG:%[0-9]+]]:_(s64) = G_FNEG [[COPY]]
+    ; GFX9-UNSAFE: [[INT:%[0-9]+]]:_(s64) = G_INTRINSIC intrinsic(@llvm.amdgcn.rcp), [[FNEG]](s64)
+    ; GFX9-UNSAFE: $vgpr0_vgpr1 = COPY [[INT]](s64)
+    %0:_(s64) = G_FCONSTANT double -1.0
+    %1:_(s64) = COPY $vgpr0_vgpr1
+    %2:_(s64) = G_FDIV %0, %1
+    $vgpr0_vgpr1 = COPY %2
+...