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
|
; RUN: opt -passes='print<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
; TODO: The load's MemoryUse can be defined by liveOnEntry. Since
; %p2 is a loop invariant and the MemoryLoc of load instr and store inst in
; loop block are NoAlias
;
; CHECK: MemoryUse(2)
; CHECK: %val = load i32, ptr %p2
define void @gep(ptr %ptr) {
entry:
%p1 = getelementptr i32, ptr %ptr, i32 1
br label %tmp
tmp:
%p2 = getelementptr i32, ptr %p1, i32 1
br label %loop
loop:
%x = phi i32 [ 0, %tmp ], [ %x.inc, %loop ]
%val = load i32, ptr %p2
%p3 = getelementptr i32, ptr %p2, i32 1
store volatile i32 0, ptr %p3
%x.inc = add i32 %x, %val
br label %loop
}
; CHECK: MemoryUse(2)
; CHECK-NEXT: %val = load i32, ptr %p2
define void @load_entry_block(ptr %ptr, ptr %addr) {
entry:
%p1 = load ptr, ptr %ptr
br label %tmp
tmp:
%p2 = getelementptr i32, ptr %p1, i32 1
br label %loop
loop:
%x = phi i32 [ 0, %tmp ], [ %x.inc, %loop ]
%val = load i32, ptr %p2
%p3 = getelementptr i32, ptr %p2, i32 1
store volatile i32 0, ptr %p3
%x.inc = add i32 %x, %val
br label %loop
}
|
