From 238fd1591ee004130ca1e857cda1d270b15efe3d Mon Sep 17 00:00:00 2001 From: Chandler Carruth Date: Wed, 26 Sep 2012 10:45:28 +0000 Subject: 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164690 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/SROA.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'lib/Transforms/Scalar/SROA.cpp') diff --git a/lib/Transforms/Scalar/SROA.cpp b/lib/Transforms/Scalar/SROA.cpp index f1cb947..67246a5 100644 --- a/lib/Transforms/Scalar/SROA.cpp +++ b/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); -- cgit v1.1