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[AArch64][RegisterBankInfo] Use the static opds mapping for alt mappings 

Avoid to rely on the dynamically allocated operands mapping for the
alternative mapping.
NFC.

llvm-svn: 282956
This commit is contained in:
Quentin Colombet 2016-09-30 21:45:56 +00:00
parent b7e7a5473d
commit b2308987ab
1 changed files with 7 additions and 14 deletions
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21
llvm/lib/Target/AArch64/AArch64RegisterBankInfo.cpp
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@ -248,20 +248,13 @@ AArch64RegisterBankInfo::getInstrAlternativeMappings(
/*NumOperands*/ 3);
InstructionMapping FPRMapping(/*ID*/ 2, /*Cost*/ 1, nullptr,
/*NumOperands*/ 3);
GPRMapping.setOperandsMapping(getOperandsMapping(
{&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
AArch64::FirstGPR],
&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
AArch64::FirstGPR],
&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
AArch64::FirstGPR]}));
FPRMapping.setOperandsMapping(getOperandsMapping(
{&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
AArch64::FirstFPR],
&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
AArch64::FirstFPR],
&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
AArch64::FirstFPR]}));
unsigned RBIdx = AArch64::getRegBankBaseIdx(Size);
GPRMapping.setOperandsMapping(
&AArch64::ValMappings[AArch64::First3OpsIdx +
(RBIdx + AArch64::FirstGPR) * 3]);
FPRMapping.setOperandsMapping(
&AArch64::ValMappings[AArch64::First3OpsIdx +
(RBIdx + AArch64::FirstFPR) * 3]);
AltMappings.emplace_back(std::move(GPRMapping));
AltMappings.emplace_back(std::move(FPRMapping));
return AltMappings;