1 ; RUN: opt -S -licm < %s | FileCheck %s
3 declare void @use_nothrow(i64 %a) nounwind
4 declare void @use(i64 %a)
6 define void @nothrow(i64 %x, i64 %y, i1* %cond) {
9 ; CHECK: %div = udiv i64 %x, %y
11 ; CHECK: call void @use_nothrow(i64 %div)
15 loop: ; preds = %entry, %for.inc
16 %div = udiv i64 %x, %y
17 call void @use_nothrow(i64 %div)
21 define void @throw_header(i64 %x, i64 %y, i1* %cond) {
22 ; CHECK-LABEL: throw_header
24 ; CHECK: %div = udiv i64 %x, %y
25 ; CHECK: call void @use(i64 %div)
29 loop: ; preds = %entry, %for.inc
30 %div = udiv i64 %x, %y
31 call void @use(i64 %div)
35 ; The header is known no throw, but the loop is not. We can
36 ; still lift out of the header.
37 define void @nothrow_header(i64 %x, i64 %y, i1 %cond) {
38 ; CHECK-LABEL: nothrow_header
40 ; CHECK: %div = udiv i64 %x, %y
42 ; CHECK: call void @use(i64 %div)
45 loop: ; preds = %entry, %for.inc
46 %div = udiv i64 %x, %y
47 br i1 %cond, label %loop-if, label %exit
49 call void @use(i64 %div)
54 ; Negative test - can't move out of throwing block
55 define void @nothrow_header_neg(i64 %x, i64 %y, i1 %cond) {
56 ; CHECK-LABEL: nothrow_header_neg
59 ; CHECK: %div = udiv i64 %x, %y
60 ; CHECK: call void @use(i64 %div)
63 loop: ; preds = %entry, %for.inc
66 %div = udiv i64 %x, %y
67 call void @use(i64 %div)