1 files changed, 87 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/load.ll b/test/Transforms/InstCombine/load.ll
new file mode 100644
index 0000000..75c62a8
--- /dev/null
+++ b/test/Transforms/InstCombine/load.ll
@@ -0,0 +1,87 @@
+; 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]
+
+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
+}