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 < %s -basicaa -newgvn -S | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
define void @patatino(i8* %blah) {
; CHECK-LABEL: @patatino(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: [[MEH:%.*]] = phi i8* [ [[BLAH:%.*]], [[ENTRY:%.*]] ], [ null, [[WHILE_BODY:%.*]] ]
; CHECK-NEXT: switch i32 undef, label [[WHILE_BODY]] [
; CHECK-NEXT: i32 666, label [[WHILE_END:%.*]]
; CHECK-NEXT: ]
; CHECK: while.body:
; CHECK-NEXT: br label [[WHILE_COND]]
; CHECK: while.end:
; CHECK-NEXT: store i8 0, i8* [[MEH]], align 1
; CHECK-NEXT: store i8 0, i8* [[BLAH]], align 1
; CHECK-NEXT: ret void
;
entry:
br label %while.cond
while.cond:
%meh = phi i8* [ %blah, %entry ], [ null, %while.body ]
switch i32 undef, label %while.body [
i32 666, label %while.end
]
while.body:
br label %while.cond
while.end:
;; These two stores will initially be considered equivalent, but then proven not.
;; the second store would previously end up deciding it's equivalent to a previous
;; store, but it was really just finding an optimistic version of itself
;; in the congruence class.
store i8 0, i8* %meh, align 1
store i8 0, i8* %blah, align 1
ret void
}
|
