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| author | Dan Gohman <gohman@apple.com> | 2009-11-20 20:19:14 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-11-20 20:19:14 +0000 |
| commit | 6a2392131e2e5b8c4123d69cc959831b4fe719ca (patch) | |
| tree | 0e57e9eb4d7fb54cd99739a679ee734204321624 /lib/Transforms/Scalar/SCCP.cpp | |
| parent | f7751c134a401575f2a2c036456e6377b2de833f (diff) | |
| download | llvm-6a2392131e2e5b8c4123d69cc959831b4fe719ca.tar.gz llvm-6a2392131e2e5b8c4123d69cc959831b4fe719ca.tar.bz2 llvm-6a2392131e2e5b8c4123d69cc959831b4fe719ca.tar.xz | |
Fix IPSCCP's code for deleting dead blocks to tolerate outstanding
blockaddress users. This fixes PR5569.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89483 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/SCCP.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/SCCP.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index c202a2c41d..977827841d 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++ b/lib/Transforms/Scalar/SCCP.cpp @@ -1869,8 +1869,12 @@ bool IPSCCP::runOnModule(Module &M) { for (unsigned i = 0, e = BlocksToErase.size(); i != e; ++i) { // If there are any PHI nodes in this successor, drop entries for BB now. BasicBlock *DeadBB = BlocksToErase[i]; - while (!DeadBB->use_empty()) { - Instruction *I = cast<Instruction>(DeadBB->use_back()); + for (Value::use_iterator UI = DeadBB->use_begin(), UE = DeadBB->use_end(); + UI != UE; ) { + // Ignore blockaddress users; BasicBlock's dtor will handle them. + Instruction *I = dyn_cast<Instruction>(*UI++); + if (!I) continue; + bool Folded = ConstantFoldTerminator(I->getParent()); if (!Folded) { // The constant folder may not have been able to fold the terminator |