xref: /llvm-project/llvm/test/Transforms/LoopStrengthReduce/pr12691.ll (revision 1c9b63f1038d13be7d83015565e2ecc395964c04)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
2; RUN: opt < %s -loop-reduce -S | FileCheck %s
3
4; Provide legal integer types.
5target datalayout = "n8:16:32:64"
6
7@d = common global i32 0, align 4
8
9define void @fn2(i32 %x) nounwind uwtable {
10; CHECK-LABEL: define void @fn2(
11; CHECK-SAME: i32 [[X:%.*]]) #[[ATTR0:[0-9]+]] {
12; CHECK-NEXT:  entry:
13; CHECK-NEXT:    br label [[FOR_COND:%.*]]
14; CHECK:       for.cond:
15; CHECK-NEXT:    [[LSR_IV:%.*]] = phi i32 [ [[LSR_IV_NEXT:%.*]], [[FOR_COND]] ], [ -1, [[ENTRY:%.*]] ]
16; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq i32 [[X]], 0
17; CHECK-NEXT:    [[LSR_IV_NEXT]] = add i32 [[LSR_IV]], 1
18; CHECK-NEXT:    br i1 [[TOBOOL]], label [[FOR_COND]], label [[FOR_END:%.*]]
19; CHECK:       for.end:
20; CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr @d, align 4
21; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr @d, align 4
22; CHECK-NEXT:    [[TMP0:%.*]] = sub i32 [[TMP1]], [[TMP2]]
23; CHECK-NEXT:    [[TOBOOL26:%.*]] = icmp eq i32 [[X]], 0
24; CHECK-NEXT:    br i1 [[TOBOOL26]], label [[FOR_END5:%.*]], label [[FOR_BODY_LR_PH:%.*]]
25; CHECK:       for.body.lr.ph:
26; CHECK-NEXT:    [[TOBOOL3:%.*]] = icmp ne i32 [[TMP0]], [[LSR_IV_NEXT]]
27; CHECK-NEXT:    br label [[FOR_END5]]
28; CHECK:       for.end5:
29; CHECK-NEXT:    ret void
30;
31entry:
32  br label %for.cond
33
34for.cond:
35  %g.0 = phi i32 [ 0, %entry ], [ %dec, %for.cond ]
36  %tobool = icmp eq i32 %x, 0
37  %dec = add nsw i32 %g.0, -1
38  br i1 %tobool, label %for.cond, label %for.end
39
40for.end:
41  %tmp1 = load i32, ptr @d, align 4
42  %add = add nsw i32 %tmp1, %g.0
43  %tmp2 = load i32, ptr @d, align 4
44  %tobool26 = icmp eq i32 %x, 0
45  br i1 %tobool26, label %for.end5, label %for.body.lr.ph
46
47for.body.lr.ph:
48  %tobool3 = icmp ne i32 %tmp2, %add
49  br label %for.end5
50
51for.end5:
52  ret void
53}
54
55
56