forked from OSchip/llvm-project
99 lines
2.4 KiB
LLVM
99 lines
2.4 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: opt < %s -instcombine -S | 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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@GLOBAL = internal constant [4 x i32] zeroinitializer
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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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define double @test11(double* %p) {
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%t0 = getelementptr double* %p, i32 1
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store double 2.0, double* %t0
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%t1 = getelementptr double* %p, i32 1
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%x = load double* %t1
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ret double %x
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}
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define i32 @test12(i32* %P) {
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%A = alloca i32
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store i32 123, i32* %A
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; Cast the result of the load not the source
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%Q = bitcast i32* %A to i32*
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%V = load i32* %Q
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ret i32 %V
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}
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define <16 x i8> @test13(<2 x i64> %x) {
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entry:
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%tmp = load <16 x i8> * bitcast ([4 x i32]* @GLOBAL to <16 x i8>*)
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ret <16 x i8> %tmp
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}
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