1 ; RUN: opt -instcombine -S < %s | FileCheck %s
3 ; This test makes sure that these instructions are properly eliminated.
6 @X = constant i32 42 ; <i32*> [#uses=2]
7 @X2 = constant i32 47 ; <i32*> [#uses=1]
8 @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]
9 @Z = constant [2 x { i32, float }] zeroinitializer ; <[2 x { i32, float }]*> [#uses=1]
11 @GLOBAL = internal constant [4 x i32] zeroinitializer
14 ; CHECK-LABEL: @test1(
17 %B = load i32* @X ; <i32> [#uses=1]
21 ; CHECK-LABEL: @test2(
23 define float @test2() {
24 %A = getelementptr [2 x { i32, float }]* @Y, i64 0, i64 1, i32 1 ; <float*> [#uses=1]
25 %B = load float* %A ; <float> [#uses=1]
29 ; CHECK-LABEL: @test3(
32 %A = getelementptr [2 x { i32, float }]* @Y, i64 0, i64 0, i32 0 ; <i32*> [#uses=1]
33 %B = load i32* %A ; <i32> [#uses=1]
37 ; CHECK-LABEL: @test4(
40 %A = getelementptr [2 x { i32, float }]* @Z, i64 0, i64 1, i32 0 ; <i32*> [#uses=1]
41 %B = load i32* %A ; <i32> [#uses=1]
45 ; CHECK-LABEL: @test5(
47 define i32 @test5(i1 %C) {
48 %Y = select i1 %C, i32* @X, i32* @X2 ; <i32*> [#uses=1]
49 %Z = load i32* %Y ; <i32> [#uses=1]
53 ; CHECK-LABEL: @test7(
55 define i32 @test7(i32 %X) {
56 %V = getelementptr i32* null, i32 %X ; <i32*> [#uses=1]
57 %R = load i32* %V ; <i32> [#uses=1]
61 ; CHECK-LABEL: @test8(
63 define i32 @test8(i32* %P) {
65 %X = load i32* %P ; <i32> [#uses=1]
69 ; CHECK-LABEL: @test9(
71 define i32 @test9(i32* %P) {
72 %X = load i32* %P ; <i32> [#uses=1]
73 %Y = load i32* %P ; <i32> [#uses=1]
74 %Z = sub i32 %X, %Y ; <i32> [#uses=1]
78 ; CHECK-LABEL: @test10(
80 define i32 @test10(i1 %C.upgrd.1, i32* %P, i32* %Q) {
81 br i1 %C.upgrd.1, label %T, label %F
90 %V = load i32* %P ; <i32> [#uses=1]
94 ; CHECK-LABEL: @test11(
96 define double @test11(double* %p) {
97 %t0 = getelementptr double* %p, i32 1
98 store double 2.0, double* %t0
99 %t1 = getelementptr double* %p, i32 1
100 %x = load double* %t1
104 ; CHECK-LABEL: @test12(
106 define i32 @test12(i32* %P) {
108 store i32 123, i32* %A
109 ; Cast the result of the load not the source
110 %Q = bitcast i32* %A to i32*
115 ; CHECK-LABEL: @test13(
117 define <16 x i8> @test13(<2 x i64> %x) {
118 %tmp = load <16 x i8>* bitcast ([4 x i32]* @GLOBAL to <16 x i8>*)