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| author | Chandler Carruth <chandlerc@gmail.com> | 2012-09-26 10:45:28 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2012-09-26 10:45:28 +0000 |
| commit | 3e4273dd0c1e6d2ae31945777e8af4ed1398f698 (patch) | |
| tree | 0e6efa098f919bbe453635190af45bc04b27846f /llvm/lib/Transforms | |
| parent | 871ba7249c104534e056db04516b006b5e3cfec1 (diff) | |
| download | bcm5719-llvm-3e4273dd0c1e6d2ae31945777e8af4ed1398f698.tar.gz bcm5719-llvm-3e4273dd0c1e6d2ae31945777e8af4ed1398f698.zip | |
When rewriting the pointer operand to a load or store which has
alignment guarantees attached, re-compute the alignment so that we
consider offsets which impact alignment.
llvm-svn: 164690
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/SROA.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/SROA.cpp b/llvm/lib/Transforms/Scalar/SROA.cpp index f1cb947011c..67246a5a1cc 100644 --- a/llvm/lib/Transforms/Scalar/SROA.cpp +++ b/llvm/lib/Transforms/Scalar/SROA.cpp @@ -1992,6 +1992,9 @@ private: Value *NewPtr = getAdjustedAllocaPtr(IRB, LI.getPointerOperand()->getType()); LI.setOperand(0, NewPtr); + if (LI.getAlignment()) + LI.setAlignment(MinAlign(NewAI.getAlignment(), + BeginOffset - NewAllocaBeginOffset)); DEBUG(dbgs() << " to: " << LI << "\n"); deleteIfTriviallyDead(OldOp); @@ -2043,6 +2046,9 @@ private: Value *NewPtr = getAdjustedAllocaPtr(IRB, SI.getPointerOperand()->getType()); SI.setOperand(1, NewPtr); + if (SI.getAlignment()) + SI.setAlignment(MinAlign(NewAI.getAlignment(), + BeginOffset - NewAllocaBeginOffset)); DEBUG(dbgs() << " to: " << SI << "\n"); deleteIfTriviallyDead(OldOp); |
