1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -loop-reduce < %s | FileCheck %s
3
4target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
5target triple = "x86_64-unknown-linux-gnu"
6
7declare void @maybe_throws()
8declare void @use1(i1)
9
10define void @is_not_null(i8* %baseptr) local_unnamed_addr align 2 personality i8* undef {
11; CHECK-LABEL: @is_not_null(
12; CHECK-NEXT:  preheader:
13; CHECK-NEXT:    br label [[HEADER:%.*]]
14; CHECK:       header:
15; CHECK-NEXT:    [[PTR:%.*]] = phi i8* [ [[INCPTR:%.*]], [[LATCH:%.*]] ], [ [[BASEPTR:%.*]], [[PREHEADER:%.*]] ]
16; CHECK-NEXT:    invoke void @maybe_throws()
17; CHECK-NEXT:    to label [[LATCH]] unwind label [[LPAD:%.*]]
18; CHECK:       lpad:
19; CHECK-NEXT:    [[TMP0:%.*]] = landingpad { i8*, i32 }
20; CHECK-NEXT:    catch i8* null
21; CHECK-NEXT:    [[PTR_IS_NOT_NULL:%.*]] = icmp ne i8* [[PTR]], null
22; CHECK-NEXT:    call void @use1(i1 [[PTR_IS_NOT_NULL]])
23; CHECK-NEXT:    ret void
24; CHECK:       latch:
25; CHECK-NEXT:    [[INCPTR]] = getelementptr inbounds i8, i8* [[PTR]], i64 1
26; CHECK-NEXT:    br label [[HEADER]]
27;
28preheader:
29  br label %header
30
31header:
32  %ptr = phi i8* [ %incptr, %latch ], [ %baseptr, %preheader ]
33  invoke void @maybe_throws() to label %latch unwind label %lpad
34
35lpad:
36  landingpad { i8*, i32 } catch i8* null
37  %ptr_is_not_null = icmp ne i8* %ptr, null
38  call void @use1(i1 %ptr_is_not_null)
39  ret void
40
41latch:
42  %incptr = getelementptr inbounds i8, i8* %ptr, i64 1
43  br label %header
44}
45