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author | Jim Grosbach <grosbach@apple.com> | 2009-10-20 16:33:57 +0000 |
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committer | Jim Grosbach <grosbach@apple.com> | 2009-10-20 16:33:57 +0000 |
commit | f7a0c0de6d73df8f24438234485b7950323b3d44 (patch) | |
tree | a46f99593917ec091be2f8eab37f55e63f25c189 /lib/CodeGen/PrologEpilogInserter.cpp | |
parent | 1a49295eae19cb70b451d513aceddc12ba6aaa61 (diff) | |
download | llvm-f7a0c0de6d73df8f24438234485b7950323b3d44.tar.gz llvm-f7a0c0de6d73df8f24438234485b7950323b3d44.tar.bz2 llvm-f7a0c0de6d73df8f24438234485b7950323b3d44.tar.xz |
Register re-use for scavenged frame indices must check for re-deginition
of the register in the instruction which kills the scavenged value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84641 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/PrologEpilogInserter.cpp')
-rw-r--r-- | lib/CodeGen/PrologEpilogInserter.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/PrologEpilogInserter.cpp b/lib/CodeGen/PrologEpilogInserter.cpp index 693bf052a2..873d2372c5 100644 --- a/lib/CodeGen/PrologEpilogInserter.cpp +++ b/lib/CodeGen/PrologEpilogInserter.cpp @@ -873,6 +873,10 @@ void PEI::scavengeFrameVirtualRegs(MachineFunction &Fn) { PrevLastUseOp = i; CurrentScratchReg = CurrentVirtReg = 0; havePrevValue = trackingCurrentValue; + // Re-scan the operands of this instruction to catch definitions + // of the scratch register we're using. This is to handle things + // like ldr "r2, [scratch]" where scratch is r2. + i = 0; } } RS->forward(MI); |