diff options
| author | Jonas Paulsson <paulsson@linux.vnet.ibm.com> | 2018-11-01 09:05:32 +0000 |
|---|---|---|
| committer | Jonas Paulsson <paulsson@linux.vnet.ibm.com> | 2018-11-01 09:05:32 +0000 |
| commit | 6749c24f408a3e1e1209c01ac9655eb5b302bd29 (patch) | |
| tree | 2b9910b42065690fb331e47b22ce1b5aa1eb762b /llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp | |
| parent | f15a53bc81377aa0c5e3864fd9cb41fa667a011d (diff) | |
| download | bcm5719-llvm-6749c24f408a3e1e1209c01ac9655eb5b302bd29.tar.gz bcm5719-llvm-6749c24f408a3e1e1209c01ac9655eb5b302bd29.zip | |
[SystemZ::TTI] Recognize the higher cost of scalar i1 -> fp conversion
Scalar i1 to fp conversions are done with a branch sequence, so it should
have a higher cost.
Review: Ulrich Weigand
https://reviews.llvm.org/D53924
llvm-svn: 345818
Diffstat (limited to 'llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp index 18333bfcc11..e7052e2e469 100644 --- a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp +++ b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.cpp @@ -749,7 +749,9 @@ int SystemZTTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src, assert (!Dst->isVectorTy()); if (Opcode == Instruction::SIToFP || Opcode == Instruction::UIToFP) - return (SrcScalarBits >= 32 ? 1 : 2 /*i8/i16 extend*/); + return (SrcScalarBits >= 32 + ? 1 + : SrcScalarBits > 1 ? 2 /*i8/i16 extend*/ : 5 /*branch seq.*/); if ((Opcode == Instruction::ZExt || Opcode == Instruction::SExt) && Src->isIntegerTy(1)) { |
