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
|
; RUN: opt < %s -indvars -replexitval=always -S | FileCheck %s --check-prefix=ALWAYS
; RUN: opt < %s -indvars -replexitval=never -S | FileCheck %s --check-prefix=NEVER
; RUN: opt < %s -indvars -replexitval=cheap -scev-cheap-expansion-budget=1 -S | FileCheck %s --check-prefix=CHEAP
; rewriteLoopExitValues() must rewrite all or none of a PHI's values from a given block.
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
@a = common global i8 0, align 1
define internal fastcc void @d(i8* %c) unnamed_addr #0 {
entry:
%cmp = icmp ule i8* %c, getelementptr inbounds (i8, i8* @a, i64 65535)
%add.ptr = getelementptr inbounds i8, i8* %c, i64 -65535
br label %while.cond
while.cond:
br i1 icmp ne (i8 0, i8 0), label %cont, label %while.end
cont:
%a.mux = select i1 %cmp, i8* @a, i8* %add.ptr
switch i64 0, label %while.cond [
i64 -1, label %handler.pointer_overflow.i
i64 0, label %handler.pointer_overflow.i
]
handler.pointer_overflow.i:
%a.mux.lcssa4 = phi i8* [ %a.mux, %cont ], [ %a.mux, %cont ]
; ALWAYS: [ %scevgep, %cont ], [ %scevgep, %cont ]
; NEVER: [ %a.mux, %cont ], [ %a.mux, %cont ]
; In cheap mode, use either one as long as it's consistent.
; CHEAP: [ %[[VAL:.*]], %cont ], [ %[[VAL]], %cont ]
%x5 = ptrtoint i8* %a.mux.lcssa4 to i64
br label %while.end
while.end:
ret void
}
|
