Revert r218778 while investigating buldbot breakage.

[oota-llvm.git] / test / Transforms / InstCombine / load.ll

diff --git a/test/Transforms/InstCombine/load.ll b/test/Transforms/InstCombine/load.ll
index f80e02e464e1673e51df61c324f4f1d259b57b87..c8ce70a5c03a58da1649112f29447719bb9d4943 100644 (file)
--- a/test/Transforms/InstCombine/load.ll
+++ b/test/Transforms/InstCombine/load.ll
@@ -1,26 +1,120 @@
+; RUN: opt -instcombine -S < %s | FileCheck %s
+
 ; This test makes sure that these instructions are properly eliminated.
-;
 
-; RUN: as < %s | opt -instcombine | dis | grep-not load
 
-%X = constant int 42
-%Y = constant [2 x { int, float }] [ { int, float } { int 12, float 1.0 }, 
-                                     { int, float } { int 37, float 1.2312 } ]
-int %test1() {
-       %B = load int* %X
-       ret int %B
+@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
+
+
+; CHECK-LABEL: @test1(
+; CHECK-NOT: load
+define i32 @test1() {
+       %B = load i32* @X               ; <i32> [#uses=1]
+       ret i32 %B
 }
 
-float %test2() {
-       %A = getelementptr [2 x { int, float}]* %Y, long 0, long 1, ubyte 1
-       %B = load float* %A
+; CHECK-LABEL: @test2(
+; CHECK-NOT: load
+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
 }
 
-int %test3() {
-       %A = getelementptr [2 x { int, float}]* %Y, long 0, long 0, ubyte 0
-       %B = load int* %A
-       ret int %B
+; CHECK-LABEL: @test3(
+; CHECK-NOT: load
+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
+}
+
+; CHECK-LABEL: @test4(
+; CHECK-NOT: load
+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
+}
+
+; CHECK-LABEL: @test5(
+; CHECK-NOT: load
+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
+}
+
+; CHECK-LABEL: @test7(
+; CHECK-NOT: load
+define i32 @test7(i32 %X) {
+       %V = getelementptr i32* null, i32 %X            ; <i32*> [#uses=1]
+       %R = load i32* %V               ; <i32> [#uses=1]
+       ret i32 %R
 }
 
+; CHECK-LABEL: @test8(
+; CHECK-NOT: load
+define i32 @test8(i32* %P) {
+       store i32 1, i32* %P
+       %X = load i32* %P               ; <i32> [#uses=1]
+       ret i32 %X
+}
+
+; CHECK-LABEL: @test9(
+; CHECK-NOT: load
+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
+}
+
+; CHECK-LABEL: @test10(
+; CHECK-NOT: load
+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
+}
 
+; CHECK-LABEL: @test11(
+; CHECK-NOT: load
+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
+}
+
+; CHECK-LABEL: @test12(
+; CHECK-NOT: load
+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
+}
+
+; CHECK-LABEL: @test13(
+; CHECK-NOT: load
+define <16 x i8> @test13(<2 x i64> %x) {
+  %tmp = load <16 x i8>* bitcast ([4 x i32]* @GLOBAL to <16 x i8>*)
+  ret <16 x i8> %tmp
+}