-; RUN: if as < %s | opt -instcombine | dis | grep cast
-; RUN: then exit 1
-; RUN: else exit 0
-; RUN: fi
-
-bool "test1"(int %X) {
- %A = cast int %X to uint
- %c = setne uint %A, 0 ; Convert to setne int %X, 0
- ret bool %c
+; This tests for various complex cast elimination cases instcombine should
+; handle.
+
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast
+
+define i1 @test1(i32 %X) {
+ %A = bitcast i32 %X to i32 ; <i32> [#uses=1]
+ ; Convert to setne int %X, 12
+ %c = icmp ne i32 %A, 12 ; <i1> [#uses=1]
+ ret i1 %c
+}
+
+define i1 @test2(i32 %X, i32 %Y) {
+ %A = bitcast i32 %X to i32 ; <i32> [#uses=1]
+ %B = bitcast i32 %Y to i32 ; <i32> [#uses=1]
+ ; Convert to setne int %X, %Y
+ %c = icmp ne i32 %A, %B ; <i1> [#uses=1]
+ ret i1 %c
+}
+
+define i32 @test4(i32 %A) {
+ %B = bitcast i32 %A to i32 ; <i32> [#uses=1]
+ %C = shl i32 %B, 2 ; <i32> [#uses=1]
+ %D = bitcast i32 %C to i32 ; <i32> [#uses=1]
+ ret i32 %D
}
-bool "test2"(int %X, int %Y) {
- %A = cast int %X to uint
- %B = cast int %Y to uint
- %c = setne uint %A, %B ; Convert to setne int %X, %Y
- ret bool %c
+define i16 @test5(i16 %A) {
+ %B = sext i16 %A to i32 ; <i32> [#uses=1]
+ %C = and i32 %B, 15 ; <i32> [#uses=1]
+ %D = trunc i32 %C to i16 ; <i16> [#uses=1]
+ ret i16 %D
}
+define i1 @test6(i1 %A) {
+ %B = zext i1 %A to i32 ; <i32> [#uses=1]
+ %C = icmp ne i32 %B, 0 ; <i1> [#uses=1]
+ ret i1 %C
+}
+
+define i1 @test6a(i1 %A) {
+ %B = zext i1 %A to i32 ; <i32> [#uses=1]
+ %C = icmp ne i32 %B, -1 ; <i1> [#uses=1]
+ ret i1 %C
+}
+
+define i1 @test7(i8* %A) {
+ %B = bitcast i8* %A to i32* ; <i32*> [#uses=1]
+ %C = icmp eq i32* %B, null ; <i1> [#uses=1]
+ ret i1 %C
+}