forked from OSchip/llvm-project
71 lines
1.8 KiB
LLVM
71 lines
1.8 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep load
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@X = constant i32 42 ; <i32*> [#uses=2]
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@X2 = constant i32 47 ; <i32*> [#uses=1]
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@Y = constant [2 x { i32, float }] [ { i32, float } { i32 12, float 1.000000e+00 }, { i32, float } { i32 37, float 0x3FF3B2FEC0000000 } ] ; <[2 x { i32, float }]*> [#uses=2]
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@Z = constant [2 x { i32, float }] zeroinitializer ; <[2 x { i32, float }]*> [#uses=1]
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define i32 @test1() {
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%B = load i32* @X ; <i32> [#uses=1]
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ret i32 %B
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}
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define float @test2() {
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%A = getelementptr [2 x { i32, float }]* @Y, i64 0, i64 1, i32 1 ; <float*> [#uses=1]
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%B = load float* %A ; <float> [#uses=1]
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ret float %B
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}
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define i32 @test3() {
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%A = getelementptr [2 x { i32, float }]* @Y, i64 0, i64 0, i32 0 ; <i32*> [#uses=1]
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%B = load i32* %A ; <i32> [#uses=1]
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ret i32 %B
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}
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define i32 @test4() {
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%A = getelementptr [2 x { i32, float }]* @Z, i64 0, i64 1, i32 0 ; <i32*> [#uses=1]
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%B = load i32* %A ; <i32> [#uses=1]
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ret i32 %B
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}
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define i32 @test5(i1 %C) {
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%Y = select i1 %C, i32* @X, i32* @X2 ; <i32*> [#uses=1]
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%Z = load i32* %Y ; <i32> [#uses=1]
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ret i32 %Z
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}
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define i32 @test7(i32 %X) {
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%V = getelementptr i32* null, i32 %X ; <i32*> [#uses=1]
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%R = load i32* %V ; <i32> [#uses=1]
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ret i32 %R
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}
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define i32 @test8(i32* %P) {
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store i32 1, i32* %P
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%X = load i32* %P ; <i32> [#uses=1]
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ret i32 %X
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}
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define i32 @test9(i32* %P) {
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%X = load i32* %P ; <i32> [#uses=1]
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%Y = load i32* %P ; <i32> [#uses=1]
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%Z = sub i32 %X, %Y ; <i32> [#uses=1]
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ret i32 %Z
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}
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define i32 @test10(i1 %C.upgrd.1, i32* %P, i32* %Q) {
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br i1 %C.upgrd.1, label %T, label %F
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T: ; preds = %0
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store i32 1, i32* %Q
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store i32 0, i32* %P
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br label %C
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F: ; preds = %0
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store i32 0, i32* %P
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br label %C
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C: ; preds = %F, %T
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%V = load i32* %P ; <i32> [#uses=1]
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ret i32 %V
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}
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