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| author | Dan Gohman <gohman@apple.com> | 2010-01-04 18:38:39 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-01-04 18:38:39 +0000 |
| commit | 00bd748d9a306e83756308568451ad0b54a4116e (patch) | |
| tree | c31af6d876989a808c530c76734bc2c4b62aed22 /lib | |
| parent | e446eec49091d277b2fe9c4b74f78b5159f59248 (diff) | |
| download | external_llvm-00bd748d9a306e83756308568451ad0b54a4116e.zip external_llvm-00bd748d9a306e83756308568451ad0b54a4116e.tar.gz external_llvm-00bd748d9a306e83756308568451ad0b54a4116e.tar.bz2 | |
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92492 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/VMCore/Instruction.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp index 170a15f..3fabfd0 100644 --- a/lib/VMCore/Instruction.cpp +++ b/lib/VMCore/Instruction.cpp @@ -399,6 +399,8 @@ bool Instruction::isSafeToSpeculativelyExecute() const { case Load: { if (cast<LoadInst>(this)->isVolatile()) return false; + // Note that it is not safe to speculate into a malloc'd region because + // malloc may return null. if (isa<AllocaInst>(getOperand(0))) return true; if (GlobalVariable *GV = dyn_cast<GlobalVariable>(getOperand(0))) |