Work around some x86 Darwin assembler bugs
llvm-svn: 25638
diff --git a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
index c4639b3..d9b263ae 100755
--- a/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86ATTAsmPrinter.cpp
@@ -220,6 +220,32 @@
///
void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
+ // This works around some Darwin assembler bugs.
+ if (forDarwin) {
+ switch (MI->getOpcode()) {
+ case X86::REP_MOVSB:
+ O << "rep/movsb (%esi),(%edi)\n";
+ return;
+ case X86::REP_MOVSD:
+ O << "rep/movsl (%esi),(%edi)\n";
+ return;
+ case X86::REP_MOVSW:
+ O << "rep/movsw (%esi),(%edi)\n";
+ return;
+ case X86::REP_STOSB:
+ O << "rep/stosb\n";
+ return;
+ case X86::REP_STOSD:
+ O << "rep/stosl\n";
+ return;
+ case X86::REP_STOSW:
+ O << "rep/stosw\n";
+ return;
+ default:
+ break;
+ }
+ }
+
// Call the autogenerated instruction printer routines.
printInstruction(MI);
}