-; I'm not really sure if instcombine should do things like these. LevelRaise
-; already sufficiently takes care of these cases, but level raise is really
-; slow. Might it be better to make there be an instcombine prepass before
-; level raise that takes care of the obvious stuff?
+; This tests for various complex cast elimination cases instcombine should
+; handle.
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep cast
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast
-bool %test1(int %X) {
- %A = cast int %X to uint
- %c = setne uint %A, 12 ; Convert to setne int %X, 12
- ret bool %c
+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
}
-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 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
}
-bool %test3(int %A, int %B) {
- %cond216 = setlt int %A, %B ; <bool> [#uses=1]
- %cst109 = cast bool %cond216 to uint ; <uint> [#uses=1]
- %cond219 = setgt int %A, %B ; <bool> [#uses=1]
- %cst111 = cast bool %cond219 to uint ; <uint> [#uses=1]
- %reg113 = and uint %cst109, %cst111 ; <uint> [#uses=1]
- %cst222 = cast uint %reg113 to bool ; <int> [#uses=1]
- ret bool %cst222
+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
}
-int %test4(int %A) {
- %B = cast int %A to uint
- %C = shl uint %B, ubyte 2
- %D = cast uint %C to int
- ret int %D
+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
}
-short %test5(short %A) {
- %B = cast short %A to uint
- %C = and uint %B, 15
- %D = cast uint %C to short
- ret short %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
}
-bool %test6(bool %A) {
- %B = cast bool %A to int
- %C = setne int %B, 0
- ret bool %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
}
-bool %test7(sbyte* %A) {
- %B = cast sbyte* %A to int*
- %C = seteq int* %B, null
- ret bool %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
}