maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Lower X86::MORESTACK_RET and X86::MORESTACK_RET_RESTORE_R10 in 

X86AsmPrinter::EmitInstruction, rather than X86MCInstLower::Lower.

The aim is to improve the reusability of the X86MCInstLower class by making it
more function-like. The X86::MORESTACK_RET_RESTORE_R10 pseudo broke the
function model by emitting an extra instruction to the MCStreamer attached to
the AsmPrinter.

The patch should have no impact on generated code. 
 

llvm-svn: 194431
This commit is contained in:
Lang Hames 2013-11-11 23:00:41 +00:00
parent 50e1f0095f
commit c2b772351e
1 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
llvm/lib/Target/X86/X86MCInstLower.cpp
View File

@ -593,18 +593,6 @@ ReSimplify:
case X86::MOVSX64rr32:
SimplifyMOVSX(OutMI);
break;
case X86::MORESTACK_RET:
OutMI.setOpcode(X86::RET);
break;
case X86::MORESTACK_RET_RESTORE_R10:
OutMI.setOpcode(X86::MOV64rr);
OutMI.addOperand(MCOperand::CreateReg(X86::R10));
OutMI.addOperand(MCOperand::CreateReg(X86::RAX));
AsmPrinter.OutStreamer.EmitInstruction(MCInstBuilder(X86::RET));
break;
}
}
@ -940,6 +928,18 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
case TargetOpcode::PATCHPOINT:
return LowerPATCHPOINT(OutStreamer, MCInstLowering, SM, *MI);
case X86::MORESTACK_RET:
OutStreamer.EmitInstruction(MCInstBuilder(X86::RET));
return;
case X86::MORESTACK_RET_RESTORE_R10:
// Return, then restore R10.
OutStreamer.EmitInstruction(MCInstBuilder(X86::RET));
OutStreamer.EmitInstruction(MCInstBuilder(X86::MOV64rr)
.addReg(X86::R10)
.addReg(X86::RAX));
return;
}
MCInst TmpInst;