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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/CodeGen | |
| 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/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp index 621c83df7aa..f29b61b59fc 100644 --- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -757,8 +757,9 @@ bool LiveIntervals::tryFoldMemoryOperand(MachineInstr* &MI, if (FilterFoldedOps(MI, Ops, MRInfo, FoldOps)) return false; - // Can't fold a load from fixed stack slot into a two address instruction. - if (isSS && DefMI && (MRInfo & VirtRegMap::isMod)) + // The only time it's safe to fold into a two address instruction is when + // it's folding reload and spill from / into a spill stack slot. + if (DefMI && (MRInfo & VirtRegMap::isMod)) return false; MachineInstr *fmi = isSS ? tii_->foldMemoryOperand(*mf_, MI, FoldOps, Slot) |
