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| author | Bill Wendling <isanbard@gmail.com> | 2009-12-17 23:42:32 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2009-12-17 23:42:32 +0000 |
| commit | 3de8249078354d25b37b40e0f10b4f88226d3dd4 (patch) | |
| tree | 788b5f0e3b4fefa0fe20c47902cb51228c8c7127 /lib/CodeGen/StrongPHIElimination.cpp | |
| parent | 08ce53996e944927699dd6e98839deb9d9d4c092 (diff) | |
| download | llvm-3de8249078354d25b37b40e0f10b4f88226d3dd4.tar.gz llvm-3de8249078354d25b37b40e0f10b4f88226d3dd4.tar.bz2 llvm-3de8249078354d25b37b40e0f10b4f88226d3dd4.tar.xz | |
Turn off critical edge splitting for landing pads. The introduction of a
non-landing pad basic block as the successor to a block that ends in an
unconditional jump will cause block folding to remove the added block as a
successor. Thus eventually removing it AND the landing pad entirely. Critical
edge splitting is an optimization, so we can safely turn it off when dealing
with landing pads.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91634 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/StrongPHIElimination.cpp')
| -rw-r--r-- | lib/CodeGen/StrongPHIElimination.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/CodeGen/StrongPHIElimination.cpp b/lib/CodeGen/StrongPHIElimination.cpp index 3c139068e6..345e22835e 100644 --- a/lib/CodeGen/StrongPHIElimination.cpp +++ b/lib/CodeGen/StrongPHIElimination.cpp @@ -907,7 +907,7 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) { // Determine which phi node operands need copies for (MachineFunction::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) - if (!I->empty() && + if (!I->empty() && !I->isLandingPad() && I->begin()->getOpcode() == TargetInstrInfo::PHI) processBlock(I); |