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]
14 ; CHECK: %c = icmp ne i32 %X, 12
18 define i1 @test2(i32 %X, i32 %Y) {
19 %A = bitcast i32 %X to i32 ; <i32> [#uses=1]
20 %B = bitcast i32 %Y to i32 ; <i32> [#uses=1]
21 ; Convert to setne int %X, %Y
22 %c = icmp ne i32 %A, %B ; <i1> [#uses=1]
25 ; CHECK: %c = icmp ne i32 %X, %Y
29 define i32 @test4(i32 %A) {
30 %B = bitcast i32 %A to i32 ; <i32> [#uses=1]
31 %C = shl i32 %B, 2 ; <i32> [#uses=1]
32 %D = bitcast i32 %C to i32 ; <i32> [#uses=1]
34 ; CHECK-LABEL: @test4(
35 ; CHECK: %C = shl i32 %A, 2
39 define i16 @test5(i16 %A) {
40 %B = sext i16 %A to i32 ; <i32> [#uses=1]
41 %C = and i32 %B, 15 ; <i32> [#uses=1]
42 %D = trunc i32 %C to i16 ; <i16> [#uses=1]
44 ; CHECK-LABEL: @test5(
45 ; CHECK: %C = and i16 %A, 15
49 define i1 @test6(i1 %A) {
50 %B = zext i1 %A to i32 ; <i32> [#uses=1]
51 %C = icmp ne i32 %B, 0 ; <i1> [#uses=1]
53 ; CHECK-LABEL: @test6(
57 define i1 @test6a(i1 %A) {
58 %B = zext i1 %A to i32 ; <i32> [#uses=1]
59 %C = icmp ne i32 %B, -1 ; <i1> [#uses=1]
61 ; CHECK-LABEL: @test6a(
65 define i1 @test7(i8* %A) {
66 %B = bitcast i8* %A to i32* ; <i32*> [#uses=1]
67 %C = icmp eq i32* %B, null ; <i1> [#uses=1]
69 ; CHECK-LABEL: @test7(
70 ; CHECK: %C = icmp eq i8* %A, null