1
; RUN: opt < %s -instcombine -S | FileCheck %s
2
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-n8:16:32:64"
4
; Instcombine should be able to eliminate all of these ext casts.
8
define i64 @test1(i64 %a) {
9
%b = trunc i64 %a to i32
11
%d = zext i32 %c to i64
12
call void @use(i32 %b)
14
; CHECK-LABEL: @test1(
18
define i64 @test2(i64 %a) {
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%b = trunc i64 %a to i32
22
%d = sext i32 %q to i64
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call void @use(i32 %b)
25
; CHECK-LABEL: @test2(
26
; CHECK: shl i64 %a, 36
27
; CHECK: %d = ashr exact i64 {{.*}}, 36
30
define i64 @test3(i64 %a) {
31
%b = trunc i64 %a to i32
33
%d = zext i32 %c to i64
34
call void @use(i32 %b)
36
; CHECK-LABEL: @test3(
40
define i64 @test4(i64 %a) {
41
%b = trunc i64 %a to i32
44
%d = zext i32 %x to i64
45
call void @use(i32 %b)
47
; CHECK-LABEL: @test4(
48
; CHECK: = and i64 %a, 8
49
; CHECK: = xor i64 {{.*}}, 8
54
define i32 @test5(i32 %A) {
55
%B = zext i32 %A to i128
57
%D = trunc i128 %C to i32
59
; CHECK-LABEL: @test5(
60
; CHECK: %C = lshr i32 %A, 16
64
define i32 @test6(i64 %A) {
65
%B = zext i64 %A to i128
67
%D = trunc i128 %C to i32
69
; CHECK-LABEL: @test6(
70
; CHECK: %C = lshr i64 %A, 32
71
; CHECK: %D = trunc i64 %C to i32
75
define i92 @test7(i64 %A) {
76
%B = zext i64 %A to i128
78
%D = trunc i128 %C to i92
80
; CHECK-LABEL: @test7(
81
; CHECK: %B = zext i64 %A to i92
82
; CHECK: %C = lshr i92 %B, 32
86
define i64 @test8(i32 %A, i32 %B) {
87
%tmp38 = zext i32 %A to i128
88
%tmp32 = zext i32 %B to i128
89
%tmp33 = shl i128 %tmp32, 32
90
%ins35 = or i128 %tmp33, %tmp38
91
%tmp42 = trunc i128 %ins35 to i64
93
; CHECK-LABEL: @test8(
94
; CHECK: %tmp38 = zext i32 %A to i64
95
; CHECK: %tmp32 = zext i32 %B to i64
96
; CHECK: %tmp33 = shl nuw i64 %tmp32, 32
97
; CHECK: %ins35 = or i64 %tmp33, %tmp38
98
; CHECK: ret i64 %ins35
101
define i8 @test9(i32 %X) {
103
%Z = trunc i32 %Y to i8
105
; CHECK-LABEL: @test9(
112
define i8 @test10(i32 %X) {
113
%Y = trunc i32 %X to i8
116
; CHECK-LABEL: @test10(