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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-07-15 22:32:11 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-07-15 22:32:11 +0000 |
| commit | 72fbc3d9d260e061bdee07059fcd63772c714091 (patch) | |
| tree | 89e3b4c2f3bdd4539693d636b5318ff926153f5c /lib/CodeGen | |
| parent | 0d7c695c74ae6d5f68cc07378c17491915e607d3 (diff) | |
Fix bug in RegScavenger::scavengeRegister().
Reserved registers are not candidates for scavenging, and they were removed
from the candidate list like this:
CreateRegClassMask(RC, Candidates);
Candidates ^= ReservedRegs;
However, when there are reserved registers outside RC, this causes invalid
bits to be set in Candidates.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75847 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index 84cff8d5d8..98f485045f 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -426,7 +426,7 @@ unsigned RegScavenger::scavengeRegister(const TargetRegisterClass *RC, // Mask off the registers which are not in the TargetRegisterClass. BitVector Candidates(NumPhysRegs, false); CreateRegClassMask(RC, Candidates); - Candidates ^= ReservedRegs; // Do not include reserved registers. + Candidates ^= ReservedRegs & Candidates; // Do not include reserved registers. // Exclude all the registers being used by the instruction. for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) { |