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These ports install binaries with "32" suffixes and most data lives in
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47 lines
1.7 KiB
Plaintext
47 lines
1.7 KiB
Plaintext
$FreeBSD$
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------------------------------------------------------------------------
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r170353 | chandlerc | 2012-12-17 18:48:07 +0000 (Mon, 17 Dec 2012) | 5 lines
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Fix another SROA crasher, PR14601.
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This was a silly oversight, we weren't pruning allocas which were used
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by variable-length memory intrinsics from the set that could be widened
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and promoted as integers. Fix that.
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------------------------------------------------------------------------
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Index: lib/Transforms/Scalar/SROA.cpp
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===================================================================
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--- lib/Transforms/Scalar/SROA.cpp (revision 170352)
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+++ lib/Transforms/Scalar/SROA.cpp (revision 170353)
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@@ -2150,7 +2150,7 @@
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!canConvertValue(TD, ValueTy, AllocaTy))
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return false;
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} else if (MemIntrinsic *MI = dyn_cast<MemIntrinsic>(I->U->getUser())) {
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- if (MI->isVolatile())
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+ if (MI->isVolatile() || !isa<Constant>(MI->getLength()))
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return false;
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if (MemTransferInst *MTI = dyn_cast<MemTransferInst>(I->U->getUser())) {
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const AllocaPartitioning::MemTransferOffsets &MTO
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Index: test/Transforms/SROA/basictest.ll
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===================================================================
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--- test/Transforms/SROA/basictest.ll (revision 170352)
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+++ test/Transforms/SROA/basictest.ll (revision 170353)
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@@ -1208,3 +1208,18 @@
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ret i32 %y
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; CHECK: ret i32
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}
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+
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+define i32 @PR14601(i32 %x) {
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+; Don't try to form a promotable integer alloca when there is a variable length
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+; memory intrinsic.
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+; CHECK: @PR14601
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+
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+entry:
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+ %a = alloca i32
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+; CHECK: alloca
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+
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+ %a.i8 = bitcast i32* %a to i8*
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+ call void @llvm.memset.p0i8.i32(i8* %a.i8, i8 0, i32 %x, i32 1, i1 false)
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+ %v = load i32* %a
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+ ret i32 %v
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+}
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