forked from OSchip/llvm-project
53 lines
1.1 KiB
LLVM
53 lines
1.1 KiB
LLVM
; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
|
|
define void @F(i8*) {
|
|
br i1 true, label %left, label %right
|
|
left:
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
store i8 16, i8* %0
|
|
br label %merge
|
|
right:
|
|
br label %merge
|
|
|
|
merge:
|
|
; CHECK-NOT: 2 = MemoryPhi
|
|
ret void
|
|
}
|
|
|
|
define void @F2(i8*) {
|
|
br i1 true, label %left, label %right
|
|
left:
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
store i8 16, i8* %0
|
|
br label %merge
|
|
right:
|
|
br label %merge
|
|
|
|
merge:
|
|
; CHECK: 2 = MemoryPhi({left,1},{right,liveOnEntry})
|
|
%c = load i8, i8* %0
|
|
ret void
|
|
}
|
|
|
|
; Ensure we treat def-only blocks as though they have uses for phi placement.
|
|
; CHECK-LABEL: define void @F3
|
|
define void @F3() {
|
|
%a = alloca i8
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: store i8 0, i8* %a
|
|
store i8 0, i8* %a
|
|
br i1 undef, label %if.then, label %if.end
|
|
|
|
if.then:
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 1, i8* %a
|
|
store i8 1, i8* %a
|
|
br label %if.end
|
|
|
|
if.end:
|
|
; CHECK: 4 = MemoryPhi({%0,1},{if.then,2})
|
|
; CHECK: 3 = MemoryDef(4)
|
|
; CHECK-NEXT: store i8 2, i8* %a
|
|
store i8 2, i8* %a
|
|
ret void
|
|
}
|