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2a29152193
If LoopInfo is available during GVN, BasicAA will use it. However MergeBlockIntoPredecessor does not update LI as it merges blocks. This didn't use to cause problems because LI was freed before GVN/BasicAA. Now with OptimizationRemarkEmitter, the lifetime of LI is extended so LI needs to be kept up-to-date during GVN. Differential Revision: https://reviews.llvm.org/D27288 llvm-svn: 288307
51 lines
1.8 KiB
LLVM
51 lines
1.8 KiB
LLVM
; RUN: opt -loops -gvn -S < %s | FileCheck %s
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; This used to fail with ASAN enabled and if for some reason LoopInfo remained
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; available during GVN. In this case BasicAA will use LI but
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; MergeBlockIntoPredecessor in GVN failed to update LI.
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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%struct.wibble.1028 = type { i32, i32, %struct.barney.881 }
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%struct.barney.881 = type { %struct.zot.882 }
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%struct.zot.882 = type { [64 x i8] }
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; Function Attrs: argmemonly
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declare void @snork.1(i8*) local_unnamed_addr #0
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define hidden zeroext i1 @eggs(%struct.wibble.1028* %arg, i1 %arg2) unnamed_addr align 2 {
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bb:
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br i1 %arg2, label %bb14, label %bb3
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bb3: ; preds = %bb
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%tmp = getelementptr inbounds %struct.wibble.1028, %struct.wibble.1028* %arg, i64 0, i32 2, i32 0, i32 0, i64 0
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%tmp5 = bitcast i8* %tmp to %struct.wibble.1028**
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br label %bb6
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bb6: ; preds = %bb12, %bb3
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br label %bb7
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bb7: ; preds = %bb6
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br i1 undef, label %bb11, label %bb8
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bb8: ; preds = %bb7
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%tmp9 = load %struct.wibble.1028*, %struct.wibble.1028** %tmp5, align 8
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; CHECK: %tmp9 = load %struct.wibble.1028*, %struct.wibble.1028** %tmp5, align 8
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%tmp10 = bitcast %struct.wibble.1028* %tmp9 to i8*
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br label %bb12
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bb11: ; preds = %bb7
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br label %bb12
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bb12: ; preds = %bb11, %bb8
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%tmp13 = phi i8* [ %tmp, %bb11 ], [ %tmp10, %bb8 ]
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call void @snork.1(i8* %tmp13) #1
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br label %bb6
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bb14: ; preds = %bb
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ret i1 false
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}
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attributes #0 = { argmemonly }
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attributes #1 = { nounwind }
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