[lanai] Add getIntImmCost in LanaiTargetTransformInfo.

Add simple int immediate cost function.

1 files changed, 27 insertions, 0 deletions

diff --git a/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h b/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
index d95c16fc3ca..12613ed273f 100644
--- a/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
+++ b/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
@@ -22,6 +22,7 @@
 #include "LanaiTargetMachine.h"
 #include "llvm/Analysis/TargetTransformInfo.h"
 #include "llvm/CodeGen/BasicTTIImpl.h"
+#include "llvm/Support/MathExtras.h"
 #include "llvm/Target/TargetLowering.h"
 
 namespace llvm {
@@ -49,6 +50,32 @@ public:
     return TTI::PSK_Software;
   }
 
+  int getIntImmCost(const APInt &Imm, Type *Ty) {
+    assert(Ty->isIntegerTy());
+    if (Imm == 0)
+      return TTI::TCC_Free;
+    if (isInt<16>(Imm.getSExtValue()))
+      return TTI::TCC_Basic;
+    if (isInt<21>(Imm.getZExtValue()))
+      return TTI::TCC_Basic;
+    if (isInt<32>(Imm.getSExtValue())) {
+      if ((Imm.getSExtValue() & 0xFFFF) == 0)
+        return TTI::TCC_Basic;
+      return 2 * TTI::TCC_Basic;
+    }
+
+    return 4 * TTI::TCC_Basic;
+  }
+
+  int getIntImmCost(unsigned Opc, unsigned Idx, const APInt &Imm, Type *Ty) {
+    return getIntImmCost(Imm, Ty);
+  }
+
+  int getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
+                    Type *Ty) {
+    return getIntImmCost(Imm, Ty);
+  }
+
   unsigned getArithmeticInstrCost(
       unsigned Opcode, Type *Ty,
       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,