1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=indvars -S < %s | FileCheck %s
; Check the case where one exit has a pointer EC, and the other doesn't.
; Note that this test case is really really fragile. Removing any
; instruction in the below causes the result to differ. Note that the lack
; of a data layout (with pointer size info) is critical to getting a pointer
; EC returned by SCEV.
@global = external global [0 x i8], align 1
define void @foo() {
; CHECK-LABEL: @foo(
; CHECK-NEXT: bb:
; CHECK-NEXT: br label [[BB3:%.*]]
; CHECK: bb3:
; CHECK-NEXT: [[TMP6:%.*]] = load i8, ptr getelementptr inbounds (i8, ptr @global, i64 1), align 1
; CHECK-NEXT: br i1 false, label [[BB7:%.*]], label [[BB11:%.*]]
; CHECK: bb7:
; CHECK-NEXT: [[TMP8:%.*]] = zext i8 [[TMP6]] to i64
; CHECK-NEXT: br i1 true, label [[BB11]], label [[BB3]]
; CHECK: bb11:
; CHECK-NEXT: ret void
;
bb:
br label %bb3
bb3: ; preds = %bb7, %bb2
%tmp = phi ptr [ %tmp4, %bb7 ], [ getelementptr inbounds ([0 x i8], ptr @global, i64 0, i64 2), %bb ]
%tmp4 = getelementptr inbounds i8, ptr %tmp, i64 -1
%tmp6 = load i8, ptr %tmp4, align 1
%tmp5 = icmp ugt ptr %tmp4, getelementptr inbounds ([0 x i8], ptr @global, i64 0, i64 500)
br i1 %tmp5, label %bb7, label %bb11
bb7: ; preds = %bb3
%tmp8 = zext i8 %tmp6 to i64
%tmp10 = icmp eq i16 0, 0
br i1 %tmp10, label %bb11, label %bb3
bb11: ; preds = %bb7, %bb3
ret void
}
|
