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; This test makes sure that these instructions are properly eliminated.
;
; RUN: opt < %s -instcombine -S | not grep load
@X = constant i32 42 ; <i32*> [#uses=2]
@X2 = constant i32 47 ; <i32*> [#uses=1]
@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]
@Z = constant [2 x { i32, float }] zeroinitializer ; <[2 x { i32, float }]*> [#uses=1]
@GLOBAL = internal constant [4 x i32] zeroinitializer
define i32 @test1() {
%B = load i32* @X ; <i32> [#uses=1]
ret i32 %B
}
define float @test2() {
%A = getelementptr [2 x { i32, float }]* @Y, i64 0, i64 1, i32 1 ; <float*> [#uses=1]
%B = load float* %A ; <float> [#uses=1]
ret float %B
}
define i32 @test3() {
%A = getelementptr [2 x { i32, float }]* @Y, i64 0, i64 0, i32 0 ; <i32*> [#uses=1]
%B = load i32* %A ; <i32> [#uses=1]
ret i32 %B
}
define i32 @test4() {
%A = getelementptr [2 x { i32, float }]* @Z, i64 0, i64 1, i32 0 ; <i32*> [#uses=1]
%B = load i32* %A ; <i32> [#uses=1]
ret i32 %B
}
define i32 @test5(i1 %C) {
%Y = select i1 %C, i32* @X, i32* @X2 ; <i32*> [#uses=1]
%Z = load i32* %Y ; <i32> [#uses=1]
ret i32 %Z
}
define i32 @test7(i32 %X) {
%V = getelementptr i32* null, i32 %X ; <i32*> [#uses=1]
%R = load i32* %V ; <i32> [#uses=1]
ret i32 %R
}
define i32 @test8(i32* %P) {
store i32 1, i32* %P
%X = load i32* %P ; <i32> [#uses=1]
ret i32 %X
}
define i32 @test9(i32* %P) {
%X = load i32* %P ; <i32> [#uses=1]
%Y = load i32* %P ; <i32> [#uses=1]
%Z = sub i32 %X, %Y ; <i32> [#uses=1]
ret i32 %Z
}
define i32 @test10(i1 %C.upgrd.1, i32* %P, i32* %Q) {
br i1 %C.upgrd.1, label %T, label %F
T: ; preds = %0
store i32 1, i32* %Q
store i32 0, i32* %P
br label %C
F: ; preds = %0
store i32 0, i32* %P
br label %C
C: ; preds = %F, %T
%V = load i32* %P ; <i32> [#uses=1]
ret i32 %V
}
define double @test11(double* %p) {
%t0 = getelementptr double* %p, i32 1
store double 2.0, double* %t0
%t1 = getelementptr double* %p, i32 1
%x = load double* %t1
ret double %x
}
define i32 @test12(i32* %P) {
%A = alloca i32
store i32 123, i32* %A
; Cast the result of the load not the source
%Q = bitcast i32* %A to i32*
%V = load i32* %Q
ret i32 %V
}
define <16 x i8> @test13(<2 x i64> %x) {
entry:
%tmp = load <16 x i8> * bitcast ([4 x i32]* @GLOBAL to <16 x i8>*)
ret <16 x i8> %tmp
}
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