; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc < %s -mtriple=i686-- -mattr=+lzcnt | FileCheck %s --check-prefixes=CHECK,X86 ; RUN: llc < %s -mtriple=x86_64-linux-gnux32 -mattr=+lzcnt | FileCheck %s --check-prefixes=CHECK,X32 ; RUN: llc < %s -mtriple=x86_64-- -mattr=+lzcnt | FileCheck %s --check-prefixes=CHECK,X64 declare i8 @llvm.ctlz.i8(i8, i1) nounwind readnone declare i16 @llvm.ctlz.i16(i16, i1) nounwind readnone declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone declare i64 @llvm.ctlz.i64(i64, i1) nounwind readnone define i8 @t1(i8 %x) nounwind { ; X86-LABEL: t1: ; X86: # %bb.0: ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax ; X86-NEXT: lzcntl %eax, %eax ; X86-NEXT: addl $-24, %eax ; X86-NEXT: # kill: def $al killed $al killed $eax ; X86-NEXT: retl ; ; X32-LABEL: t1: ; X32: # %bb.0: ; X32-NEXT: movzbl %dil, %eax ; X32-NEXT: lzcntl %eax, %eax ; X32-NEXT: addl $-24, %eax ; X32-NEXT: # kill: def $al killed $al killed $eax ; X32-NEXT: retq ; ; X64-LABEL: t1: ; X64: # %bb.0: ; X64-NEXT: movzbl %dil, %eax ; X64-NEXT: lzcntl %eax, %eax ; X64-NEXT: addl $-24, %eax ; X64-NEXT: # kill: def $al killed $al killed $eax ; X64-NEXT: retq %tmp = tail call i8 @llvm.ctlz.i8( i8 %x, i1 false ) ret i8 %tmp } define i16 @t2(i16 %x) nounwind { ; X86-LABEL: t2: ; X86: # %bb.0: ; X86-NEXT: lzcntw {{[0-9]+}}(%esp), %ax ; X86-NEXT: retl ; ; X32-LABEL: t2: ; X32: # %bb.0: ; X32-NEXT: lzcntw %di, %ax ; X32-NEXT: retq ; ; X64-LABEL: t2: ; X64: # %bb.0: ; X64-NEXT: lzcntw %di, %ax ; X64-NEXT: retq %tmp = tail call i16 @llvm.ctlz.i16( i16 %x, i1 false ) ret i16 %tmp } define i32 @t3(i32 %x) nounwind { ; X86-LABEL: t3: ; X86: # %bb.0: ; X86-NEXT: lzcntl {{[0-9]+}}(%esp), %eax ; X86-NEXT: retl ; ; X32-LABEL: t3: ; X32: # %bb.0: ; X32-NEXT: lzcntl %edi, %eax ; X32-NEXT: retq ; ; X64-LABEL: t3: ; X64: # %bb.0: ; X64-NEXT: lzcntl %edi, %eax ; X64-NEXT: retq %tmp = tail call i32 @llvm.ctlz.i32( i32 %x, i1 false ) ret i32 %tmp } define i64 @t4(i64 %x) nounwind { ; X86-LABEL: t4: ; X86: # %bb.0: ; X86-NEXT: movl {{[0-9]+}}(%esp), %eax ; X86-NEXT: testl %eax, %eax ; X86-NEXT: jne .LBB3_1 ; X86-NEXT: # %bb.2: ; X86-NEXT: lzcntl {{[0-9]+}}(%esp), %eax ; X86-NEXT: addl $32, %eax ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: retl ; X86-NEXT: .LBB3_1: ; X86-NEXT: lzcntl %eax, %eax ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: retl ; ; X32-LABEL: t4: ; X32: # %bb.0: ; X32-NEXT: lzcntq %rdi, %rax ; X32-NEXT: retq ; ; X64-LABEL: t4: ; X64: # %bb.0: ; X64-NEXT: lzcntq %rdi, %rax ; X64-NEXT: retq %tmp = tail call i64 @llvm.ctlz.i64( i64 %x, i1 false ) ret i64 %tmp } define i8 @t5(i8 %x) nounwind { ; X86-LABEL: t5: ; X86: # %bb.0: ; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax ; X86-NEXT: lzcntl %eax, %eax ; X86-NEXT: addl $-24, %eax ; X86-NEXT: # kill: def $al killed $al killed $eax ; X86-NEXT: retl ; ; X32-LABEL: t5: ; X32: # %bb.0: ; X32-NEXT: movzbl %dil, %eax ; X32-NEXT: lzcntl %eax, %eax ; X32-NEXT: addl $-24, %eax ; X32-NEXT: # kill: def $al killed $al killed $eax ; X32-NEXT: retq ; ; X64-LABEL: t5: ; X64: # %bb.0: ; X64-NEXT: movzbl %dil, %eax ; X64-NEXT: lzcntl %eax, %eax ; X64-NEXT: addl $-24, %eax ; X64-NEXT: # kill: def $al killed $al killed $eax ; X64-NEXT: retq %tmp = tail call i8 @llvm.ctlz.i8( i8 %x, i1 true ) ret i8 %tmp } define i16 @t6(i16 %x) nounwind { ; X86-LABEL: t6: ; X86: # %bb.0: ; X86-NEXT: lzcntw {{[0-9]+}}(%esp), %ax ; X86-NEXT: retl ; ; X32-LABEL: t6: ; X32: # %bb.0: ; X32-NEXT: lzcntw %di, %ax ; X32-NEXT: retq ; ; X64-LABEL: t6: ; X64: # %bb.0: ; X64-NEXT: lzcntw %di, %ax ; X64-NEXT: retq %tmp = tail call i16 @llvm.ctlz.i16( i16 %x, i1 true ) ret i16 %tmp } define i32 @t7(i32 %x) nounwind { ; X86-LABEL: t7: ; X86: # %bb.0: ; X86-NEXT: lzcntl {{[0-9]+}}(%esp), %eax ; X86-NEXT: retl ; ; X32-LABEL: t7: ; X32: # %bb.0: ; X32-NEXT: lzcntl %edi, %eax ; X32-NEXT: retq ; ; X64-LABEL: t7: ; X64: # %bb.0: ; X64-NEXT: lzcntl %edi, %eax ; X64-NEXT: retq %tmp = tail call i32 @llvm.ctlz.i32( i32 %x, i1 true ) ret i32 %tmp } define i64 @t8(i64 %x) nounwind { ; X86-LABEL: t8: ; X86: # %bb.0: ; X86-NEXT: movl {{[0-9]+}}(%esp), %eax ; X86-NEXT: testl %eax, %eax ; X86-NEXT: jne .LBB7_1 ; X86-NEXT: # %bb.2: ; X86-NEXT: lzcntl {{[0-9]+}}(%esp), %eax ; X86-NEXT: addl $32, %eax ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: retl ; X86-NEXT: .LBB7_1: ; X86-NEXT: lzcntl %eax, %eax ; X86-NEXT: xorl %edx, %edx ; X86-NEXT: retl ; ; X32-LABEL: t8: ; X32: # %bb.0: ; X32-NEXT: lzcntq %rdi, %rax ; X32-NEXT: retq ; ; X64-LABEL: t8: ; X64: # %bb.0: ; X64-NEXT: lzcntq %rdi, %rax ; X64-NEXT: retq %tmp = tail call i64 @llvm.ctlz.i64( i64 %x, i1 true ) ret i64 %tmp }