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| author | Philip Reames <listmail@philipreames.com> | 2019-03-19 17:20:49 +0000 |
|---|---|---|
| committer | Philip Reames <listmail@philipreames.com> | 2019-03-19 17:20:49 +0000 |
| commit | 2153c4b8281c1e5f25887ef9183947198c50a9d2 (patch) | |
| tree | 37661d78ace54e1333616815cc9f1e8571dd2fb7 /llvm/lib/CodeGen | |
| parent | ae211ece6a90c367ef0cdbabad3110aba3fcda67 (diff) | |
| download | bcm5719-llvm-2153c4b8281c1e5f25887ef9183947198c50a9d2.tar.gz bcm5719-llvm-2153c4b8281c1e5f25887ef9183947198c50a9d2.zip | |
[AtomicExpand] Fix a crash bug when lowering unordered loads to cmpxchg
Add tests for wider atomic loads and stores. In the process, fix a crasher where we appearently handled unorder stores, but not loads, when lowering to cmpxchg idioms.
llvm-svn: 356482
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/AtomicExpandPass.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AtomicExpandPass.cpp b/llvm/lib/CodeGen/AtomicExpandPass.cpp index 10dd21d1ef9..7a8013abccf 100644 --- a/llvm/lib/CodeGen/AtomicExpandPass.cpp +++ b/llvm/lib/CodeGen/AtomicExpandPass.cpp @@ -430,6 +430,9 @@ bool AtomicExpand::expandAtomicLoadToLL(LoadInst *LI) { bool AtomicExpand::expandAtomicLoadToCmpXchg(LoadInst *LI) { IRBuilder<> Builder(LI); AtomicOrdering Order = LI->getOrdering(); + if (Order == AtomicOrdering::Unordered) + Order = AtomicOrdering::Monotonic; + Value *Addr = LI->getPointerOperand(); Type *Ty = cast<PointerType>(Addr->getType())->getElementType(); Constant *DummyVal = Constant::getNullValue(Ty); |
