1; RUN: opt -codegenprepare -disable-cgp-branch-opts -S < %s | FileCheck %s
2target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
3target triple = "x86_64-unknown-linux-gnu"
4
5; The first cast should be sunk into block2, in order that the
6; instruction selector can form an efficient
7; i64 * i64 -> i128 multiplication.
8define i128 @sink(i64* %mem1, i64* %mem2) {
9; CHECK-LABEL: block1:
10; CHECK-NEXT: load
11block1:
12  %l1 = load i64, i64* %mem1
13  %s1 = sext i64 %l1 to i128
14  br label %block2
15
16; CHECK-LABEL: block2:
17; CHECK-NEXT: sext
18; CHECK-NEXT: load
19; CHECK-NEXT: sext
20block2:
21  %l2 = load i64, i64* %mem2
22  %s2 = sext i64 %l2 to i128
23  %res = mul i128 %s1, %s2
24  ret i128 %res
25}
26
27; The first cast should be hoisted into block1, in order that the
28; instruction selector can form an extend-load.
29define i64 @hoist(i32* %mem1, i32* %mem2) {
30; CHECK-LABEL: block1:
31; CHECK-NEXT: load
32; CHECK-NEXT: sext
33block1:
34  %l1 = load i32, i32* %mem1
35  br label %block2
36
37; CHECK-LABEL: block2:
38; CHECK-NEXT: load
39; CHECK-NEXT: sext
40block2:
41  %s1 = sext i32 %l1 to i64
42  %l2 = load i32, i32* %mem2
43  %s2 = sext i32 %l2 to i64
44  %res = mul i64 %s1, %s2
45  ret i64 %res
46}
47
48; Make sure the cast sink logic and OptimizeExtUses don't end up in an infinite
49; loop.
50define i128 @use_ext_source() {
51block1:
52  %v1 = or i64 undef, undef
53  %v2 = zext i64 %v1 to i128
54  br i1 undef, label %block2, label %block3
55
56block2:
57  %v3 = add i64 %v1, 1
58  %v4 = zext i64 %v3 to i128
59  br label %block3
60
61block3:
62  %res = phi i128 [ %v2, %block1 ], [ %v4, %block2 ]
63  ret i128 %res
64}
65