1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -mtriple=x86_64-linux -codegenprepare -S < %s | FileCheck %s
3
4declare { i64, i1 } @llvm.uadd.with.overflow.i64(i64, i64)
5
6define i32 @test_01(i32* %p, i64 %len, i32 %x) {
7; CHECK-LABEL: @test_01(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br label [[LOOP:%.*]]
10; CHECK:       loop:
11; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[MATH:%.*]], [[BACKEDGE:%.*]] ], [ [[LEN:%.*]], [[ENTRY:%.*]] ]
12; CHECK-NEXT:    [[TMP0:%.*]] = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 [[IV]], i64 1)
13; CHECK-NEXT:    [[MATH]] = extractvalue { i64, i1 } [[TMP0]], 0
14; CHECK-NEXT:    [[OV:%.*]] = extractvalue { i64, i1 } [[TMP0]], 1
15; CHECK-NEXT:    br i1 [[OV]], label [[EXIT:%.*]], label [[BACKEDGE]]
16; CHECK:       backedge:
17; CHECK-NEXT:    [[SUNKADDR3:%.*]] = mul i64 [[MATH]], 4
18; CHECK-NEXT:    [[TMP1:%.*]] = bitcast i32* [[P:%.*]] to i8*
19; CHECK-NEXT:    [[SUNKADDR4:%.*]] = getelementptr i8, i8* [[TMP1]], i64 [[SUNKADDR3]]
20; CHECK-NEXT:    [[TMP2:%.*]] = bitcast i8* [[SUNKADDR4]] to i32*
21; CHECK-NEXT:    [[LOADED:%.*]] = load atomic i32, i32* [[TMP2]] unordered, align 4
22; CHECK-NEXT:    [[COND_2:%.*]] = icmp eq i32 [[LOADED]], [[X:%.*]]
23; CHECK-NEXT:    br i1 [[COND_2]], label [[FAILURE:%.*]], label [[LOOP]]
24; CHECK:       exit:
25; CHECK-NEXT:    ret i32 -1
26; CHECK:       failure:
27; CHECK-NEXT:    unreachable
28;
29entry:
30  br label %loop
31
32loop:                                             ; preds = %backedge, %entry
33  %iv = phi i64 [ %math, %backedge ], [ %len, %entry ]
34  %0 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %iv, i64 1)
35  %math = extractvalue { i64, i1 } %0, 0
36  %ov = extractvalue { i64, i1 } %0, 1
37  br i1 %ov, label %exit, label %backedge
38
39backedge:                                         ; preds = %loop
40  %sunkaddr = mul i64 %iv, 4
41  %1 = bitcast i32* %p to i8*
42  %sunkaddr1 = getelementptr i8, i8* %1, i64 %sunkaddr
43  %sunkaddr2 = getelementptr i8, i8* %sunkaddr1, i64 4
44  %2 = bitcast i8* %sunkaddr2 to i32*
45  %loaded = load atomic i32, i32* %2 unordered, align 4
46  %cond_2 = icmp eq i32 %loaded, %x
47  br i1 %cond_2, label %failure, label %loop
48
49exit:                                             ; preds = %loop
50  ret i32 -1
51
52failure:                                          ; preds = %backedge
53  unreachable
54}
55