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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-03-18 18:50:58 +0000 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2019-03-18 18:50:58 +0000 |
| commit | 270249de2bb3d713f89c64bf6bfbdd589c4a33fb (patch) | |
| tree | f981c450a12a5c8c6dc6c48edb4096f5128215c7 /llvm/lib | |
| parent | a3cefa5d6492a4ba593b74b1aa615f00a5b6166d (diff) | |
| download | bcm5719-llvm-270249de2bb3d713f89c64bf6bfbdd589c4a33fb.tar.gz bcm5719-llvm-270249de2bb3d713f89c64bf6bfbdd589c4a33fb.zip | |
[AArch64] Small fix for getIntImmCost
It uses the generic AArch64_IMM::expandMOVImm to get the correct
number of instruction used in immediate materialization.
Reviewers: efriedma
Differential Revision: https://reviews.llvm.org/D58461
llvm-svn: 356391
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp index 50624a82def..77cc6cf8013 100644 --- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp +++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp @@ -6,6 +6,7 @@ // //===----------------------------------------------------------------------===// +#include "AArch64ExpandImm.h" #include "AArch64TargetTransformInfo.h" #include "MCTargetDesc/AArch64AddressingModes.h" #include "llvm/Analysis/LoopInfo.h" @@ -49,8 +50,9 @@ int AArch64TTIImpl::getIntImmCost(int64_t Val) { Val = ~Val; // Calculate how many moves we will need to materialize this constant. - unsigned LZ = countLeadingZeros((uint64_t)Val); - return (64 - LZ + 15) / 16; + SmallVector<AArch64_IMM::ImmInsnModel, 4> Insn; + AArch64_IMM::expandMOVImm(Val, 64, Insn); + return Insn.size(); } /// Calculate the cost of materializing the given constant. |
