-; 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?
-
-; 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.
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+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
+; CHECK: %c = icmp ne i32 %X, 12
+; CHECK: 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
+; CHECK: %c = icmp ne i32 %X, %Y
+; CHECK: 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
+; CHECK: %C = shl i32 %A, 2
+; CHECK: ret i32 %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 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
+; CHECK: %C = and i16 %A, 15
+; CHECK: ret i16 %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 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
+; CHECK: ret i1 %A
}
-int %test4(int %A) {
- %B = cast int %A to uint
- %C = shl uint %B, ubyte 1
- %D = cast uint %C to int
- ret int %D
+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
+; CHECK: ret i1 true
}
+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
+; CHECK: %C = icmp eq i8* %A, null
+; CHECK: ret i1 %C
+}