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author | Roman Divacky <rdivacky@FreeBSD.org> | 2010-03-06 09:22:29 +0000 |
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committer | Roman Divacky <rdivacky@FreeBSD.org> | 2010-03-06 09:22:29 +0000 |
commit | f5a3459adfde823bc7617f8ecfdd9fbc5a1ffadf (patch) | |
tree | 542734eaa7870f95912cbaebccb87dbec0c20b4f /lib/CodeGen/MachineSink.cpp | |
parent | 67a71b3184ce20a901e874d0ee25e01397dd87ef (diff) | |
download | src-f5a3459adfde823bc7617f8ecfdd9fbc5a1ffadf.tar.gz src-f5a3459adfde823bc7617f8ecfdd9fbc5a1ffadf.zip |
Update LLVM to r97873.
Notes
Notes:
svn path=/vendor/llvm/dist/; revision=204792
Diffstat (limited to 'lib/CodeGen/MachineSink.cpp')
-rw-r--r-- | lib/CodeGen/MachineSink.cpp | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp index 9ba7d1486e0a..e47ba7c2cc37 100644 --- a/lib/CodeGen/MachineSink.cpp +++ b/lib/CodeGen/MachineSink.cpp @@ -72,8 +72,13 @@ bool MachineSinking::AllUsesDominatedByBlock(unsigned Reg, MachineBasicBlock *MBB) const { assert(TargetRegisterInfo::isVirtualRegister(Reg) && "Only makes sense for vregs"); - for (MachineRegisterInfo::use_iterator I = RegInfo->use_begin(Reg), - E = RegInfo->use_end(); I != E; ++I) { + // Ignoring debug uses is necessary so debug info doesn't affect the code. + // This may leave a referencing dbg_value in the original block, before + // the definition of the vreg. Dwarf generator handles this although the + // user might not get the right info at runtime. + for (MachineRegisterInfo::use_nodbg_iterator I = + RegInfo->use_nodbg_begin(Reg), + E = RegInfo->use_nodbg_end(); I != E; ++I) { // Determine the block of the use. MachineInstr *UseInst = &*I; MachineBasicBlock *UseBlock = UseInst->getParent(); @@ -135,7 +140,10 @@ bool MachineSinking::ProcessBlock(MachineBasicBlock &MBB) { ProcessedBegin = I == MBB.begin(); if (!ProcessedBegin) --I; - + + if (MI->isDebugValue()) + continue; + if (SinkInstruction(MI, SawStore)) ++NumSunk, MadeChange = true; |