diff options
| -rw-r--r-- | llvm/lib/Target/Mips/MipsFastISel.cpp | 25 | ||||
| -rw-r--r-- | llvm/test/CodeGen/Mips/Fast-ISel/fptrunc.ll | 20 |
2 files changed, 45 insertions, 0 deletions
diff --git a/llvm/lib/Target/Mips/MipsFastISel.cpp b/llvm/lib/Target/Mips/MipsFastISel.cpp index bd3d08527b7..14cf86f0b77 100644 --- a/llvm/lib/Target/Mips/MipsFastISel.cpp +++ b/llvm/lib/Target/Mips/MipsFastISel.cpp @@ -81,6 +81,7 @@ private: bool SelectIntExt(const Instruction *I); bool SelectTrunc(const Instruction *I); bool SelectFPExt(const Instruction *I); + bool SelectFPTrunc(const Instruction *I); bool isTypeLegal(Type *Ty, MVT &VT); bool isLoadTypeLegal(Type *Ty, MVT &VT); @@ -406,6 +407,28 @@ bool MipsFastISel::SelectFPExt(const Instruction *I) { return true; } +// Attempt to fast-select a floating-point truncate instruction. +bool MipsFastISel::SelectFPTrunc(const Instruction *I) { + Value *Src = I->getOperand(0); + EVT SrcVT = TLI.getValueType(Src->getType(), true); + EVT DestVT = TLI.getValueType(I->getType(), true); + + if (SrcVT != MVT::f64 || DestVT != MVT::f32) + return false; + + unsigned SrcReg = getRegForValue(Src); + if (!SrcReg) + return false; + + unsigned DestReg = createResultReg(&Mips::FGR32RegClass); + if (!DestReg) + return false; + + EmitInst(Mips::CVT_S_D32, DestReg).addReg(SrcReg); + updateValueMap(I, DestReg); + return true; +} + bool MipsFastISel::SelectIntExt(const Instruction *I) { Type *DestTy = I->getType(); Value *Src = I->getOperand(0); @@ -475,6 +498,8 @@ bool MipsFastISel::fastSelectInstruction(const Instruction *I) { case Instruction::ZExt: case Instruction::SExt: return SelectIntExt(I); + case Instruction::FPTrunc: + return SelectFPTrunc(I); case Instruction::FPExt: return SelectFPExt(I); } diff --git a/llvm/test/CodeGen/Mips/Fast-ISel/fptrunc.ll b/llvm/test/CodeGen/Mips/Fast-ISel/fptrunc.ll new file mode 100644 index 00000000000..d843dee5a8c --- /dev/null +++ b/llvm/test/CodeGen/Mips/Fast-ISel/fptrunc.ll @@ -0,0 +1,20 @@ +; RUN: llc -march=mipsel -relocation-model=pic -O0 -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \ +; RUN: < %s | FileCheck %s +; RUN: llc -march=mipsel -relocation-model=pic -O0 -mips-fast-isel -fast-isel-abort -mcpu=mips32 \ +; RUN: < %s | FileCheck %s + +@d = global double 0x40147E6B74DF0446, align 8 +@f = common global float 0.000000e+00, align 4 +@.str = private unnamed_addr constant [6 x i8] c"%f \0A\00", align 1 + +; Function Attrs: nounwind +define void @fv() #0 { +entry: + %0 = load double* @d, align 8 + %conv = fptrunc double %0 to float +; CHECK: cvt.s.d $f{{[0-9]+}}, $f{{[0-9]+}} + store float %conv, float* @f, align 4 + ret void +} + +attributes #1 = { nounwind } |
