forked from OSchip/llvm-project
182 lines
4.5 KiB
LLVM
182 lines
4.5 KiB
LLVM
; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
|
|
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
|
|
|
|
; %ptr can't alias %local, so we should be able to optimize the use of %local to
|
|
; point to the store to %local.
|
|
; CHECK-LABEL: define void @check
|
|
define void @check(i8* %ptr, i1 %bool) {
|
|
entry:
|
|
%local = alloca i8, align 1
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: store i8 0, i8* %local, align 1
|
|
store i8 0, i8* %local, align 1
|
|
br i1 %bool, label %if.then, label %if.end
|
|
|
|
if.then:
|
|
%p2 = getelementptr inbounds i8, i8* %ptr, i32 1
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 0, i8* %p2, align 1
|
|
store i8 0, i8* %p2, align 1
|
|
br label %if.end
|
|
|
|
if.end:
|
|
; CHECK: 3 = MemoryPhi({entry,1},{if.then,2})
|
|
; CHECK: MemoryUse(1)
|
|
; CHECK-NEXT: load i8, i8* %local, align 1
|
|
load i8, i8* %local, align 1
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: define void @check2
|
|
define void @check2(i1 %val1, i1 %val2, i1 %val3) {
|
|
entry:
|
|
%local = alloca i8, align 1
|
|
%local2 = alloca i8, align 1
|
|
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: store i8 0, i8* %local
|
|
store i8 0, i8* %local
|
|
br i1 %val1, label %if.then, label %phi.3
|
|
|
|
if.then:
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 2, i8* %local2
|
|
store i8 2, i8* %local2
|
|
br i1 %val2, label %phi.2, label %phi.3
|
|
|
|
phi.3:
|
|
; CHECK: 5 = MemoryPhi({entry,1},{if.then,2})
|
|
; CHECK: 3 = MemoryDef(5)
|
|
; CHECK-NEXT: store i8 3, i8* %local2
|
|
store i8 3, i8* %local2
|
|
br i1 %val3, label %phi.2, label %phi.1
|
|
|
|
phi.2:
|
|
; CHECK: 6 = MemoryPhi({if.then,2},{phi.3,3})
|
|
; CHECK: 4 = MemoryDef(6)
|
|
; CHECK-NEXT: store i8 4, i8* %local2
|
|
store i8 4, i8* %local2
|
|
br label %phi.1
|
|
|
|
phi.1:
|
|
; Order matters here; phi.2 needs to come before phi.3, because that's the order
|
|
; they're visited in.
|
|
; CHECK: 7 = MemoryPhi({phi.2,4},{phi.3,3})
|
|
; CHECK: MemoryUse(1)
|
|
; CHECK-NEXT: load i8, i8* %local
|
|
load i8, i8* %local
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: define void @cross_phi
|
|
define void @cross_phi(i8* noalias %p1, i8* noalias %p2) {
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: store i8 0, i8* %p1
|
|
store i8 0, i8* %p1
|
|
; CHECK: MemoryUse(1)
|
|
; CHECK-NEXT: load i8, i8* %p1
|
|
load i8, i8* %p1
|
|
br i1 undef, label %a, label %b
|
|
|
|
a:
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 0, i8* %p2
|
|
store i8 0, i8* %p2
|
|
br i1 undef, label %c, label %d
|
|
|
|
b:
|
|
; CHECK: 3 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 1, i8* %p2
|
|
store i8 1, i8* %p2
|
|
br i1 undef, label %c, label %d
|
|
|
|
c:
|
|
; CHECK: 6 = MemoryPhi({a,2},{b,3})
|
|
; CHECK: 4 = MemoryDef(6)
|
|
; CHECK-NEXT: store i8 2, i8* %p2
|
|
store i8 2, i8* %p2
|
|
br label %e
|
|
|
|
d:
|
|
; CHECK: 7 = MemoryPhi({a,2},{b,3})
|
|
; CHECK: 5 = MemoryDef(7)
|
|
; CHECK-NEXT: store i8 3, i8* %p2
|
|
store i8 3, i8* %p2
|
|
br label %e
|
|
|
|
e:
|
|
; 8 = MemoryPhi({c,4},{d,5})
|
|
; CHECK: MemoryUse(1)
|
|
; CHECK-NEXT: load i8, i8* %p1
|
|
load i8, i8* %p1
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: define void @looped
|
|
define void @looped(i8* noalias %p1, i8* noalias %p2) {
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: store i8 0, i8* %p1
|
|
store i8 0, i8* %p1
|
|
br label %loop.1
|
|
|
|
loop.1:
|
|
; CHECK: 5 = MemoryPhi({%0,1},{loop.3,4})
|
|
; CHECK: 2 = MemoryDef(5)
|
|
; CHECK-NEXT: store i8 0, i8* %p2
|
|
store i8 0, i8* %p2
|
|
br i1 undef, label %loop.2, label %loop.3
|
|
|
|
loop.2:
|
|
; CHECK: 6 = MemoryPhi({loop.1,2},{loop.3,4})
|
|
; CHECK: 3 = MemoryDef(6)
|
|
; CHECK-NEXT: store i8 1, i8* %p2
|
|
store i8 1, i8* %p2
|
|
br label %loop.3
|
|
|
|
loop.3:
|
|
; CHECK: 7 = MemoryPhi({loop.1,2},{loop.2,3})
|
|
; CHECK: 4 = MemoryDef(7)
|
|
; CHECK-NEXT: store i8 2, i8* %p2
|
|
store i8 2, i8* %p2
|
|
; CHECK: MemoryUse(1)
|
|
; CHECK-NEXT: load i8, i8* %p1
|
|
load i8, i8* %p1
|
|
br i1 undef, label %loop.2, label %loop.1
|
|
}
|
|
|
|
; CHECK-LABEL: define void @looped_visitedonlyonce
|
|
define void @looped_visitedonlyonce(i8* noalias %p1, i8* noalias %p2) {
|
|
br label %while.cond
|
|
|
|
while.cond:
|
|
; CHECK: 4 = MemoryPhi({%0,liveOnEntry},{if.end,3})
|
|
; CHECK-NEXT: br i1 undef, label %if.then, label %if.end
|
|
br i1 undef, label %if.then, label %if.end
|
|
|
|
if.then:
|
|
; CHECK: 1 = MemoryDef(4)
|
|
; CHECK-NEXT: store i8 0, i8* %p1
|
|
store i8 0, i8* %p1
|
|
br i1 undef, label %if.end, label %if.then2
|
|
|
|
if.then2:
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: store i8 1, i8* %p2
|
|
store i8 1, i8* %p2
|
|
br label %if.end
|
|
|
|
if.end:
|
|
; CHECK: 5 = MemoryPhi({while.cond,4},{if.then,1},{if.then2,2})
|
|
; CHECK: MemoryUse(5)
|
|
; CHECK-NEXT: load i8, i8* %p1
|
|
load i8, i8* %p1
|
|
; CHECK: 3 = MemoryDef(5)
|
|
; CHECK-NEXT: store i8 2, i8* %p2
|
|
store i8 2, i8* %p2
|
|
; CHECK: MemoryUse(5)
|
|
; CHECK-NEXT: load i8, i8* %p1
|
|
load i8, i8* %p1
|
|
br label %while.cond
|
|
}
|
|
|