diff options
| author | Manman Ren <mren@apple.com> | 2013-01-10 01:10:10 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2013-01-10 01:10:10 +0000 |
| commit | 86441169da23959c81d8648c3dfdc7a0bb8d2225 (patch) | |
| tree | 83dec40a840a61665f75b6052878d06e66bb8709 /lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | |
| parent | 7932c41884f182ae44a3feacc8a6a462e9097ca1 (diff) | |
Stack Alignment: throw error if we can't satisfy the minimal alignment
requirement when creating stack objects in MachineFrameInfo.
Add CreateStackObjectWithMinAlign to throw error when the minimal alignment
can't be achieved and to clamp the alignment when the preferred alignment
can't be achieved. Same is true for CreateVariableSizedObject.
Will not emit error in CreateSpillStackObject or CreateStackObject.
As long as callers of CreateStackObject do not assume the object will be
aligned at the requested alignment, we should not have miscompile since
later optimizations which look at the object's alignment will have the correct
information.
rdar://12713765
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172027 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 8c22db35cb..ee98b00e2b 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -3259,7 +3259,8 @@ void SelectionDAGBuilder::visitAlloca(const AllocaInst &I) { // Inform the Frame Information that we have just allocated a variable-sized // object. - FuncInfo.MF->getFrameInfo()->CreateVariableSizedObject(Align ? Align : 1); + FuncInfo.MF->getFrameInfo()->CreateVariableSizedObject(Align ? Align : 1, + I.getAlignment(), &I); } void SelectionDAGBuilder::visitLoad(const LoadInst &I) { |