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-rw-r--r--lib/Target/X86/X86TargetAsmInfo.cpp12
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index e21596c..226feb7 100644
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -411,11 +411,21 @@ bool X86TargetAsmInfo<BaseTAI>::ExpandInlineAsm(CallInst *CI) const {
// bswap $0
if (AsmPieces.size() == 2 &&
- AsmPieces[0] == "bswap" && AsmPieces[1] == "$0") {
+ AsmPieces[0] == "bswap" && (AsmPieces[1] == "$0" ||
+ AsmPieces[1] == "${0:q}")) {
// No need to check constraints, nothing other than the equivalent of
// "=r,0" would be valid here.
return LowerToBSwap(CI);
}
+ // rorw $$8, ${0:w} --> llvm.bswap.i16
+ if (CI->getType() == Type::Int16Ty &&
+ AsmPieces.size() == 3 &&
+ AsmPieces[0] == "rorw" &&
+ AsmPieces[1] == "$$8," &&
+ AsmPieces[2] == "${0:w}" &&
+ IA->getConstraintString() == "=r,0,~{dirflag},~{fpsr},~{flags},~{cc}") {
+ return LowerToBSwap(CI);
+ }
break;
case 3:
if (CI->getType() == Type::Int64Ty && Constraints.size() >= 2 &&