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
|
; RUN: opt -disable-output -passes="loop-mssa(loop-rotate),print<memoryssa>" -verify-memoryssa < %s 2>&1 | FileCheck %s
; CHECK: entry:
; CHECK-NEXT: 3 = MemoryDef(liveOnEntry)
; CHECK-NEXT: store ptr null, ptr %p, align 8
; CHECK-NEXT: MemoryUse(3)
; CHECK-NEXT: %val11 = load ptr, ptr %p, align 8
; CHECK: loop.latch:
; CHECK-NEXT: 5 = MemoryPhi({loop.latch,1},{loop.latch.lr.ph,3})
; CHECK-NEXT: MemoryUse(5)
; CHECK-NEXT: %val2 = load ptr, ptr %p, align 8
; CHECK-NEXT: 1 = MemoryDef(5)
; CHECK-NEXT: store ptr null, ptr %p, align 8
; CHECK-NEXT: MemoryUse(1)
; CHECK-NEXT: %val1 = load ptr, ptr %p, align 8
; CHECK: exit:
; CHECK-NEXT: 4 = MemoryPhi({entry,3},{loop.exit_crit_edge,1})
define void @test(ptr %p) {
entry:
br label %loop
loop:
store ptr null, ptr %p
%val1 = load ptr, ptr %p
%cmp = icmp eq ptr %val1, null
br i1 %cmp, label %exit, label %loop.latch
loop.latch:
%val2 = load ptr, ptr %p
br label %loop
exit:
ret void
}
|
