9d172c8e9c
This switches to using DSE + MemorySSA by default again, after fixing the issues reported after the first commit. Notable fixes fc8200633122, a0017c2bc258. This reverts commit 3a59628f3cc26eb085acfc9cbdc97243ef71a6c5.
32 lines
1.1 KiB
LLVM
32 lines
1.1 KiB
LLVM
; RUN: opt < %s -debugify -basic-aa -dse -S | FileCheck %s
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target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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declare noalias i8* @malloc(i32)
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declare void @test_f()
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define i32* @test_salvage(i32 %arg) {
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; Check that all four original local variables have their values preserved.
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; CHECK-LABEL: @test_salvage(
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; CHECK-NEXT: malloc
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; CHECK-NEXT: @llvm.dbg.value(metadata i8* %p, metadata ![[p:.*]], metadata !DIExpression())
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: @llvm.dbg.value(metadata i32* %P, metadata ![[P:.*]], metadata !DIExpression())
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; CHECK-NEXT: @llvm.dbg.value(metadata i32 %arg, metadata ![[DEAD:.*]], metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value))
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; CHECK-NEXT: call void @test_f()
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; CHECK-NEXT: store i32 0, i32* %P
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%p = tail call i8* @malloc(i32 4)
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%P = bitcast i8* %p to i32*
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%DEAD = add i32 %arg, 1
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store i32 %DEAD, i32* %P
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call void @test_f()
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store i32 0, i32* %P
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ret i32* %P
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}
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; CHECK: ![[p]] = !DILocalVariable(name: "1"
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; CHECK: ![[P]] = !DILocalVariable(name: "2"
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; CHECK: ![[DEAD]] = !DILocalVariable(name: "3"
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