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| author | Tim Northover <tnorthover@apple.com> | 2016-07-27 17:47:54 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2016-07-27 17:47:54 +0000 |
| commit | 8d2f52e035ceb361d3410d2b76b48a287c529356 (patch) | |
| tree | ba4097b350146a830a1c97b25515b5e0a3440755 /llvm/lib/CodeGen | |
| parent | ebebd6d2ff8430a32d294819ee05001f21a9808b (diff) | |
| download | bcm5719-llvm-8d2f52e035ceb361d3410d2b76b48a287c529356.tar.gz bcm5719-llvm-8d2f52e035ceb361d3410d2b76b48a287c529356.zip | |
GlobalISel: support zero-sized allocas
All allocas must be at least 1 byte at the MachineIR level so we allocate just
one byte.
llvm-svn: 276897
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp index 6a8712e184b..e035c66b24a 100644 --- a/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp +++ b/llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp @@ -172,6 +172,9 @@ bool IRTranslator::translateStaticAlloca(const AllocaInst &AI) { unsigned Size = ElementSize * cast<ConstantInt>(AI.getArraySize())->getZExtValue(); + // Always allocate at least one byte. + Size = std::max(Size, 1u); + unsigned Alignment = AI.getAlignment(); if (!Alignment) Alignment = DL->getABITypeAlignment(AI.getAllocatedType()); |
