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39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: opt < %s -basicaa -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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; Ensure that the dead store is deleted in this case. It is wholely
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; overwritten by the second store.
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define void @test1(i32 *%V) {
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%V2 = bitcast i32* %V to i8* ; <i8*> [#uses=1]
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store i8 0, i8* %V2
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store i32 1234567, i32* %V
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ret void
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; CHECK: @test1
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; CHECK-NEXT: store i32 1234567
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}
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; Note that we could do better by merging the two stores into one.
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define void @test2(i32* %P) {
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; CHECK: @test2
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store i32 0, i32* %P
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; CHECK: store i32
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%Q = bitcast i32* %P to i16*
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store i16 1, i16* %Q
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; CHECK: store i16
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ret void
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}
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define i32 @test3(double %__x) {
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; CHECK: @test3
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; CHECK: store double
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%__u = alloca { [3 x i32] }
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%tmp.1 = bitcast { [3 x i32] }* %__u to double*
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store double %__x, double* %tmp.1
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%tmp.4 = getelementptr { [3 x i32] }* %__u, i32 0, i32 0, i32 1
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%tmp.5 = load i32* %tmp.4
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%tmp.6 = icmp slt i32 %tmp.5, 0
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%tmp.7 = zext i1 %tmp.6 to i32
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ret i32 %tmp.7
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}
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