1 ; This tests for various complex cast elimination cases instcombine should
4 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"
6 ; RUN: opt < %s -instcombine -S | FileCheck %s
8 define i1 @test1(i32 %X) {
9 %A = bitcast i32 %X to i32 ; <i32> [#uses=1]
10 ; Convert to setne int %X, 12
11 %c = icmp ne i32 %A, 12 ; <i1> [#uses=1]
13 ; CHECK: %c = icmp ne i32 %X, 12
17 define i1 @test2(i32 %X, i32 %Y) {
18 %A = bitcast i32 %X to i32 ; <i32> [#uses=1]
19 %B = bitcast i32 %Y to i32 ; <i32> [#uses=1]
20 ; Convert to setne int %X, %Y
21 %c = icmp ne i32 %A, %B ; <i1> [#uses=1]
23 ; CHECK: %c = icmp ne i32 %X, %Y
27 define i32 @test4(i32 %A) {
28 %B = bitcast i32 %A to i32 ; <i32> [#uses=1]
29 %C = shl i32 %B, 2 ; <i32> [#uses=1]
30 %D = bitcast i32 %C to i32 ; <i32> [#uses=1]
32 ; CHECK: %C = shl i32 %A, 2
36 define i16 @test5(i16 %A) {
37 %B = sext i16 %A to i32 ; <i32> [#uses=1]
38 %C = and i32 %B, 15 ; <i32> [#uses=1]
39 %D = trunc i32 %C to i16 ; <i16> [#uses=1]
41 ; CHECK: %C = and i16 %A, 15
45 define i1 @test6(i1 %A) {
46 %B = zext i1 %A to i32 ; <i32> [#uses=1]
47 %C = icmp ne i32 %B, 0 ; <i1> [#uses=1]
52 define i1 @test6a(i1 %A) {
53 %B = zext i1 %A to i32 ; <i32> [#uses=1]
54 %C = icmp ne i32 %B, -1 ; <i1> [#uses=1]
59 define i1 @test7(i8* %A) {
60 %B = bitcast i8* %A to i32* ; <i32*> [#uses=1]
61 %C = icmp eq i32* %B, null ; <i1> [#uses=1]
63 ; CHECK: %C = icmp eq i8* %A, null