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AllocaInst should store Align instead of MaybeAlign.

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Along the lines of D77454 and D79968.  Unlike loads and stores, the
default alignment is getPrefTypeAlign, to match the existing handling in
various places, including SelectionDAG and InstCombine.

Differential Revision: https://reviews.llvm.org/D80044
This commit is contained in:
Eli Friedman
2020-05-15 13:23:14 -07:00
parent 135b877874
commit 4f04db4b54
53 changed files with 353 additions and 397 deletions
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8
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -4826,7 +4826,13 @@ Error BitcodeReader::parseFunctionBody(Function *F) {
const DataLayout &DL = TheModule->getDataLayout();
unsigned AS = DL.getAllocaAddrSpace();
AllocaInst *AI = new AllocaInst(Ty, AS, Size, Align);
SmallPtrSet<Type *, 4> Visited;
if (!Align && !Ty->isSized(&Visited))
return error("alloca of unsized type");
if (!Align)
Align = DL.getPrefTypeAlign(Ty);
AllocaInst *AI = new AllocaInst(Ty, AS, Size, *Align);
AI->setUsedWithInAlloca(InAlloca);
AI->setSwiftError(SwiftError);
I = AI;