1 ; RUN: opt < %s -instcombine -S | FileCheck %s
3 ; Instcombine should be able to eliminate all of these ext casts.
7 define i64 @test1(i64 %a) {
8 %b = trunc i64 %a to i32
10 %d = zext i32 %c to i64
11 call void @use(i32 %b)
14 ; CHECK: %d = and i64 %a, 15
17 define i64 @test2(i64 %a) {
18 %b = trunc i64 %a to i32
21 %d = sext i32 %q to i64
22 call void @use(i32 %b)
25 ; CHECK: shl i64 %a, 36
26 ; CHECK: %d = ashr i64 {{.*}}, 36
29 define i64 @test3(i64 %a) {
30 %b = trunc i64 %a to i32
32 %d = zext i32 %c to i64
33 call void @use(i32 %b)
36 ; CHECK: %d = and i64 %a, 8
39 define i64 @test4(i64 %a) {
40 %b = trunc i64 %a to i32
43 %d = zext i32 %x to i64
44 call void @use(i32 %b)
47 ; CHECK: = and i64 %a, 8
48 ; CHECK: %d = xor i64 {{.*}}, 8
52 define i32 @test5(i32 %A) {
53 %B = zext i32 %A to i128
55 %D = trunc i128 %C to i32
58 ; CHECK: %C = lshr i32 %A, 16
62 define i32 @test6(i64 %A) {
63 %B = zext i64 %A to i128
65 %D = trunc i128 %C to i32
68 ; CHECK: %C = lshr i64 %A, 32
69 ; CHECK: %D = trunc i64 %C to i32
73 define i92 @test7(i64 %A) {
74 %B = zext i64 %A to i128
76 %D = trunc i128 %C to i92
79 ; CHECK: %C = lshr i64 %A, 32
80 ; CHECK: %D = zext i64 %C to i92