mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-25 14:02:52 +02:00
9672c87c77
r270777 improved the precision of alloca vs. inbounbds GEP alias queries: if we have (a) an inbounds GEP and (b) a pointer based on an alloca, and the beginning of the object the GEP points to would have a negative offset with respect to the alloca, then the GEP can not alias pointer (b). This makes the same logic fire when (b) is based on a GlobalVariable instead of an alloca. Differential Revision: http://reviews.llvm.org/D20652 llvm-svn: 270893
99 lines
3.7 KiB
LLVM
99 lines
3.7 KiB
LLVM
; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
|
|
target triple = "i386-unknown-linux-gnu"
|
|
|
|
declare i32* @random.i32(i32* %ptr)
|
|
|
|
; CHECK-LABEL: Function: arr:
|
|
; CHECK-DAG: MayAlias: i32* %alloca, i32* %p0
|
|
; CHECK-DAG: NoAlias: i32* %alloca, i32* %p1
|
|
define void @arr() {
|
|
%alloca = alloca i32, i32 4
|
|
%random = call i32* @random.i32(i32* %alloca)
|
|
%p0 = getelementptr inbounds i32, i32* %random, i32 0
|
|
%p1 = getelementptr inbounds i32, i32* %random, i32 1
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: Function: arg:
|
|
; CHECK-DAG: MayAlias: i32* %arg, i32* %p0
|
|
; CHECK-DAG: MayAlias: i32* %arg, i32* %p1
|
|
define void @arg(i32* %arg) {
|
|
%random = call i32* @random.i32(i32* %arg)
|
|
%p0 = getelementptr inbounds i32, i32* %random, i32 0
|
|
%p1 = getelementptr inbounds i32, i32* %random, i32 1
|
|
ret void
|
|
}
|
|
|
|
@gv = global i32 1
|
|
; CHECK-LABEL: Function: global:
|
|
; CHECK-DAG: MayAlias: i32* %p0, i32* @gv
|
|
; CHECK-DAG: NoAlias: i32* %p1, i32* @gv
|
|
define void @global() {
|
|
%random = call i32* @random.i32(i32* @gv)
|
|
%p0 = getelementptr inbounds i32, i32* %random, i32 0
|
|
%p1 = getelementptr inbounds i32, i32* %random, i32 1
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: Function: struct:
|
|
; CHECK-DAG: MayAlias: i32* %f0, i32* %p0
|
|
; CHECK-DAG: MayAlias: i32* %f1, i32* %p0
|
|
; CHECK-DAG: NoAlias: i32* %f0, i32* %p1
|
|
; CHECK-DAG: MayAlias: i32* %f1, i32* %p1
|
|
%struct = type { i32, i32, i32 }
|
|
define void @struct() {
|
|
%alloca = alloca %struct
|
|
%alloca.i32 = bitcast %struct* %alloca to i32*
|
|
%random = call i32* @random.i32(i32* %alloca.i32)
|
|
%f0 = getelementptr inbounds %struct, %struct* %alloca, i32 0, i32 0
|
|
%f1 = getelementptr inbounds %struct, %struct* %alloca, i32 0, i32 1
|
|
%p0 = getelementptr inbounds i32, i32* %random, i32 0
|
|
%p1 = getelementptr inbounds i32, i32* %random, i32 1
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: Function: complex1:
|
|
; CHECK-DAG: MayAlias: i32* %a2.0, i32* %r2.0
|
|
; CHECK-DAG: NoAlias: i32* %a2.0, i32* %r2.1
|
|
; CHECK-DAG: MayAlias: i32* %a2.0, i32* %r2.i
|
|
; CHECK-DAG: MayAlias: i32* %a2.0, i32* %r2.1i
|
|
; CHECK-DAG: NoAlias: i32* %a1, i32* %r2.0
|
|
; CHECK-DAG: NoAlias: i32* %a1, i32* %r2.1
|
|
; CHECK-DAG: NoAlias: i32* %a1, i32* %r2.i
|
|
; CHECK-DAG: NoAlias: i32* %a1, i32* %r2.1i
|
|
%complex = type { i32, i32, [4 x i32] }
|
|
define void @complex1(i32 %i) {
|
|
%alloca = alloca %complex
|
|
%alloca.i32 = bitcast %complex* %alloca to i32*
|
|
%r.i32 = call i32* @random.i32(i32* %alloca.i32)
|
|
%random = bitcast i32* %r.i32 to %complex*
|
|
%a1 = getelementptr inbounds %complex, %complex* %alloca, i32 0, i32 1
|
|
%a2.0 = getelementptr inbounds %complex, %complex* %alloca, i32 0, i32 2, i32 0
|
|
%r2.0 = getelementptr inbounds %complex, %complex* %random, i32 0, i32 2, i32 0
|
|
%r2.1 = getelementptr inbounds %complex, %complex* %random, i32 0, i32 2, i32 1
|
|
%r2.i = getelementptr inbounds %complex, %complex* %random, i32 0, i32 2, i32 %i
|
|
%r2.1i = getelementptr inbounds i32, i32* %r2.1, i32 %i
|
|
ret void
|
|
}
|
|
|
|
; CHECK-LABEL: Function: complex2:
|
|
; CHECK-DAG: NoAlias: i32* %alloca, i32* %p120
|
|
; CHECK-DAG: NoAlias: i32* %alloca, i32* %pi20
|
|
; CHECK-DAG: NoAlias: i32* %alloca, i32* %pij1
|
|
; CHECK-DAG: MayAlias: i32* %a3, i32* %pij1
|
|
%inner = type { i32, i32 }
|
|
%outer = type { i32, i32, [10 x %inner] }
|
|
declare %outer* @rand_outer(i32* %p)
|
|
define void @complex2(i32 %i, i32 %j) {
|
|
%alloca = alloca i32, i32 128
|
|
%a3 = getelementptr inbounds i32, i32* %alloca, i32 3
|
|
%random = call %outer* @rand_outer(i32* %alloca)
|
|
%p120 = getelementptr inbounds %outer, %outer* %random, i32 1, i32 2, i32 2, i32 0
|
|
%pi20 = getelementptr inbounds %outer, %outer* %random, i32 %i, i32 2, i32 2, i32 0
|
|
%pij1 = getelementptr inbounds %outer, %outer* %random, i32 %i, i32 2, i32 %j, i32 1
|
|
ret void
|
|
}
|
|
|