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[X86] Add some comments about when some X86 intrinsic autoupgrade code was added.

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Someday we'd like to remove old autoupgrade code so it helps to annotate how long its been there so we don't have to go digging through commit history.

llvm-svn: 348728
This commit is contained in:
Craig Topper 2018-12-09 18:02:40 +00:00
parent dfe2ba9df9
commit aa42014a97
1 changed files with 7 additions and 7 deletions
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14
lib/IR/AutoUpgrade.cpp
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@ -382,20 +382,20 @@ static bool UpgradeX86IntrinsicFunction(Function *F, StringRef Name,
return true;
}
if (Name == "addcarryx.u32")
if (Name == "addcarryx.u32") // Added in 8.0
return UpgradeADCSBBIntrinsic(F, Intrinsic::x86_addcarryx_u32, NewFn);
if (Name == "addcarryx.u64")
if (Name == "addcarryx.u64") // Added in 8.0
return UpgradeADCSBBIntrinsic(F, Intrinsic::x86_addcarryx_u64, NewFn);
if (Name == "addcarry.u32")
if (Name == "addcarry.u32") // Added in 8.0
return UpgradeADCSBBIntrinsic(F, Intrinsic::x86_addcarry_u32, NewFn);
if (Name == "addcarry.u64")
if (Name == "addcarry.u64") // Added in 8.0
return UpgradeADCSBBIntrinsic(F, Intrinsic::x86_addcarry_u64, NewFn);
if (Name == "subborrow.u32")
if (Name == "subborrow.u32") // Added in 8.0
return UpgradeADCSBBIntrinsic(F, Intrinsic::x86_subborrow_u32, NewFn);
if (Name == "subborrow.u64")
if (Name == "subborrow.u64") // Added in 8.0
return UpgradeADCSBBIntrinsic(F, Intrinsic::x86_subborrow_u64, NewFn);
if (Name == "rdtscp") {
if (Name == "rdtscp") { // Added in 8.0
// If this intrinsic has 0 operands, it's the new version.
if (F->getFunctionType()->getNumParams() == 0)
return false;