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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-08-03 22:12:51 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-08-03 22:12:51 +0000 |
| commit | e744ac49f4cf878e2b34dba26964f04fb0415fa3 (patch) | |
| tree | 330cd152682bcc4bd9e503dc39f8f675e5f41446 /lib/CodeGen/RegisterCoalescer.cpp | |
| parent | 982dc84762fc0c2ca35e6947d648a690dd22343c (diff) | |
| download | llvm-e744ac49f4cf878e2b34dba26964f04fb0415fa3.tar.gz llvm-e744ac49f4cf878e2b34dba26964f04fb0415fa3.tar.bz2 llvm-e744ac49f4cf878e2b34dba26964f04fb0415fa3.tar.xz | |
Delete merged physreg copies in joinReservedPhysReg().
Previously, the identity copy would survive through register allocation
before it was removed by the rewriter.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161269 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegisterCoalescer.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterCoalescer.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/CodeGen/RegisterCoalescer.cpp b/lib/CodeGen/RegisterCoalescer.cpp index 1fcc24d7e0..990633440e 100644 --- a/lib/CodeGen/RegisterCoalescer.cpp +++ b/lib/CodeGen/RegisterCoalescer.cpp @@ -1091,6 +1091,11 @@ bool RegisterCoalescer::joinReservedPhysReg(CoalescerPair &CP) { // register live range doesn't need to be accurate as long as all the // defs are there. + // Delete the identity copy. + MachineInstr *CopyMI = MRI->getVRegDef(RHS.reg); + LIS->RemoveMachineInstrFromMaps(CopyMI); + CopyMI->eraseFromParent(); + // We don't track kills for reserved registers. MRI->clearKillFlags(CP.getSrcReg()); |