RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-04-12 04:26:43 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

The X86FixupLEAs pass for Intel Atom must not call convertToThreeAddress

Browse Source 
on ADD16rr opcodes, if src1 != src, since that would cause 
convertToThreeAddress to try to create a virtual register. This is not
permitted after register allocation, which is when the X86FixupLEAs pass
runs.

This patch fixes PR16785.

llvm-svn: 191711
This commit is contained in:
Preston Gurd 2013-09-30 23:18:42 +00:00
parent d9670853b9
commit a352cdea56
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lib/Target/X86/X86FixupLEAs.cpp
View File

@ -125,6 +125,14 @@ FixupLEAPass::postRAConvertToLEA(MachineFunction::iterator &MFI,
// which requires isImm() to be true // which requires isImm() to be true
return 0; return 0;
} }
case X86::ADD16rr:
case X86::ADD16rr_DB:
if (MI->getOperand(1).getReg() != MI->getOperand(2).getReg()) {
// if src1 != src2, then convertToThreeAddress will
// need to create a Virtual register, which we cannot do
// after register allocation.
return 0;
}
} }
return TII->convertToThreeAddress(MFI, MBBI, 0); return TII->convertToThreeAddress(MFI, MBBI, 0);
} }