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
43
44
45
46
| ; RUN: opt -hexagon-loop-idiom -loop-deletion -gvn -S < %s
; REQUIRES: asserts
; This tests that the HexagonLoopIdiom pass does not mark LCSSA information
; as preserved. The pass calls SimplifyInstruction is a couple of places,
; which can invalidate LCSSA. Specifically, the uses of a LCSSA phi variable
; are replaced by the incoming value.
define hidden void @test() local_unnamed_addr #0 {
entry:
br label %if.then63
if.then63:
br i1 undef, label %do.body311, label %if.end375
do.body311:
br i1 undef, label %do.end318, label %do.body311
do.end318:
br i1 undef, label %if.end322, label %if.end375
if.end322:
%sub325 = sub i32 undef, undef
br i1 undef, label %do.end329, label %do.body311
do.end329:
%sub325.lcssa = phi i32 [ %sub325, %if.end322 ]
br label %do.body330
do.body330:
%row_width.7 = phi i32 [ %sub325.lcssa, %do.end329 ], [ %dec334, %do.body330 ]
%sp.5 = phi i8* [ undef, %do.end329 ], [ %incdec.ptr331, %do.body330 ]
%dp.addr.5 = phi i8* [ undef, %do.end329 ], [ %incdec.ptr332, %do.body330 ]
%0 = load i8, i8* %sp.5, align 1
store i8 %0, i8* %dp.addr.5, align 1
%incdec.ptr332 = getelementptr inbounds i8, i8* %dp.addr.5, i32 1
%incdec.ptr331 = getelementptr inbounds i8, i8* %sp.5, i32 1
%dec334 = add i32 %row_width.7, -1
%cmp335 = icmp eq i32 %dec334, 0
br i1 %cmp335, label %if.end375, label %do.body330
if.end375:
ret void
}
attributes #0 = { nounwind }
|