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74 lines
1.8 KiB
LLVM
74 lines
1.8 KiB
LLVM
; RUN: opt < %s -gvn -instcombine -S |& FileCheck %s
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; Make sure that basicaa thinks R and r are must aliases.
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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define i32 @test1(i8 * %P) {
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entry:
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%Q = bitcast i8* %P to {i32, i32}*
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%R = getelementptr {i32, i32}* %Q, i32 0, i32 1
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%S = load i32* %R
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%q = bitcast i8* %P to {i32, i32}*
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%r = getelementptr {i32, i32}* %q, i32 0, i32 1
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%s = load i32* %r
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%t = sub i32 %S, %s
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ret i32 %t
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; CHECK: @test1
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; CHECK: ret i32 0
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}
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define i32 @test2(i8 * %P) {
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entry:
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%Q = bitcast i8* %P to {i32, i32, i32}*
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%R = getelementptr {i32, i32, i32}* %Q, i32 0, i32 1
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%S = load i32* %R
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%r = getelementptr {i32, i32, i32}* %Q, i32 0, i32 2
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store i32 42, i32* %r
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%s = load i32* %R
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%t = sub i32 %S, %s
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ret i32 %t
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; CHECK: @test2
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; CHECK: ret i32 0
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}
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; This was a miscompilation.
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define i32 @test3({float, {i32, i32, i32}}* %P) {
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entry:
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%P2 = getelementptr {float, {i32, i32, i32}}* %P, i32 0, i32 1
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%R = getelementptr {i32, i32, i32}* %P2, i32 0, i32 1
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%S = load i32* %R
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%r = getelementptr {i32, i32, i32}* %P2, i32 0, i32 2
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store i32 42, i32* %r
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%s = load i32* %R
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%t = sub i32 %S, %s
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ret i32 %t
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; CHECK: @test3
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; CHECK: ret i32 0
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}
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;; This is reduced from the SmallPtrSet constructor.
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%SmallPtrSetImpl = type { i8**, i32, i32, i32, [1 x i8*] }
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%SmallPtrSet64 = type { %SmallPtrSetImpl, [64 x i8*] }
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define i32 @test4(%SmallPtrSet64* %P) {
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entry:
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%tmp2 = getelementptr inbounds %SmallPtrSet64* %P, i64 0, i32 0, i32 1
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store i32 64, i32* %tmp2, align 8
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%tmp3 = getelementptr inbounds %SmallPtrSet64* %P, i64 0, i32 0, i32 4, i64 64
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store i8* null, i8** %tmp3, align 8
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%tmp4 = load i32* %tmp2, align 8
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ret i32 %tmp4
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; CHECK: @test4
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; CHECK: ret i32 64
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}
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