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| author | Evan Cheng <evan.cheng@apple.com> | 2008-03-31 23:19:51 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-03-31 23:19:51 +0000 |
| commit | e4f77c69ac8909f7272c5e25e4857c8f9305618e (patch) | |
| tree | e5aa7654d7ee03ee264e6300db4c021c07d76e12 /llvm/lib/Target/X86 | |
| parent | 3bcfc6edc081df57ecb9f5fcd61b328630f2398b (diff) | |
| download | bcm5719-llvm-e4f77c69ac8909f7272c5e25e4857c8f9305618e.tar.gz bcm5719-llvm-e4f77c69ac8909f7272c5e25e4857c8f9305618e.zip | |
It's not safe to fold a load from GV stub or constantpool into a two-address use.
llvm-svn: 49002
Diffstat (limited to 'llvm/lib/Target/X86')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index ffe20833228..8a5464567ff 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -1825,7 +1825,15 @@ X86InstrInfo::foldMemoryOperand(MachineInstr *MI, unsigned i, MI->getOperand(0).getReg() == MI->getOperand(1).getReg()) { OpcodeTablePtr = &RegOp2MemOpTable2Addr; isTwoAddrFold = true; + // Can't write back to CPI or a GV stub. + if (MOs[3].isCPI() || + (MOs[3].isGlobal() && isGVStub(MOs[3].getGlobal(), TM))) + return NULL; } else if (i == 0) { // If operand 0 + // Can't write back to CPI or a GV stub. + if (MOs[3].isCPI() || + (MOs[3].isGlobal() && isGVStub(MOs[3].getGlobal(), TM))) + return NULL; if (MI->getOpcode() == X86::MOV16r0) NewMI = MakeM0Inst(*this, X86::MOV16mi, MOs, MI); else if (MI->getOpcode() == X86::MOV32r0) |
