57d57b1afd
With opaque pointers, we cannot use the pointer element type to determine the LocationSize for the AA query. Instead, -aa-eval tests are now required to have an explicit load or store for any pointer they want to compute alias results for, and the load/store types are used to determine the location size. This may affect ordering of results, and sorting within one result, as the type is not considered part of the sorted string anymore. To somewhat minimize the churn, printing still uses faux typed pointer notation.
194 lines
6.8 KiB
LLVM
194 lines
6.8 KiB
LLVM
; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i386-unknown-linux-gnu"
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declare i32* @random.i32(i32* %ptr)
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declare i8* @random.i8(i32* %ptr)
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; CHECK-LABEL: Function: arr:
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; CHECK-DAG: MayAlias: i32* %alloca, i32* %p0
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; CHECK-DAG: NoAlias: i32* %alloca, i32* %p1
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define void @arr() {
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%alloca = alloca i32, i32 4
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%random = call i32* @random.i32(i32* %alloca)
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%p0 = getelementptr inbounds i32, i32* %random, i32 0
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%p1 = getelementptr inbounds i32, i32* %random, i32 1
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load i32, i32* %alloca
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load i32, i32* %p0
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load i32, i32* %p1
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ret void
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}
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; CHECK-LABEL: Function: arg:
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; CHECK-DAG: MayAlias: i32* %arg, i32* %p0
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; CHECK-DAG: MayAlias: i32* %arg, i32* %p1
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define void @arg(i32* %arg) {
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%random = call i32* @random.i32(i32* %arg)
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%p0 = getelementptr inbounds i32, i32* %random, i32 0
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%p1 = getelementptr inbounds i32, i32* %random, i32 1
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load i32, i32* %arg
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load i32, i32* %p0
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load i32, i32* %p1
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ret void
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}
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@gv = global i32 1
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; CHECK-LABEL: Function: global:
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; CHECK-DAG: MayAlias: i32* %p0, i32* @gv
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; CHECK-DAG: NoAlias: i32* %p1, i32* @gv
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define void @global() {
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%random = call i32* @random.i32(i32* @gv)
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%p0 = getelementptr inbounds i32, i32* %random, i32 0
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%p1 = getelementptr inbounds i32, i32* %random, i32 1
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load i32, i32* @gv
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load i32, i32* %p0
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load i32, i32* %p1
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ret void
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}
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; CHECK-LABEL: Function: struct:
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; CHECK-DAG: MayAlias: i32* %f0, i32* %p0
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; CHECK-DAG: MayAlias: i32* %f1, i32* %p0
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; CHECK-DAG: NoAlias: i32* %f0, i32* %p1
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; CHECK-DAG: MayAlias: i32* %f1, i32* %p1
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%struct = type { i32, i32, i32 }
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define void @struct() {
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%alloca = alloca %struct
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%alloca.i32 = bitcast %struct* %alloca to i32*
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%random = call i32* @random.i32(i32* %alloca.i32)
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%f0 = getelementptr inbounds %struct, %struct* %alloca, i32 0, i32 0
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%f1 = getelementptr inbounds %struct, %struct* %alloca, i32 0, i32 1
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%p0 = getelementptr inbounds i32, i32* %random, i32 0
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%p1 = getelementptr inbounds i32, i32* %random, i32 1
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load i32, i32* %f0
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load i32, i32* %f1
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load i32, i32* %p0
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load i32, i32* %p1
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ret void
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}
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; CHECK-LABEL: Function: complex1:
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; CHECK-DAG: MayAlias: i32* %a2.0, i32* %r2.0
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; CHECK-DAG: NoAlias: i32* %a2.0, i32* %r2.1
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; CHECK-DAG: MayAlias: i32* %a2.0, i32* %r2.i
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; CHECK-DAG: MayAlias: i32* %a2.0, i32* %r2.1i
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; CHECK-DAG: NoAlias: i32* %a1, i32* %r2.0
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; CHECK-DAG: NoAlias: i32* %a1, i32* %r2.1
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; CHECK-DAG: MayAlias: i32* %a1, i32* %r2.i
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; CHECK-DAG: MayAlias: i32* %a1, i32* %r2.1i
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%complex = type { i32, i32, [4 x i32] }
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define void @complex1(i32 %i) {
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%alloca = alloca %complex
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%alloca.i32 = bitcast %complex* %alloca to i32*
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%r.i32 = call i32* @random.i32(i32* %alloca.i32)
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%random = bitcast i32* %r.i32 to %complex*
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%a1 = getelementptr inbounds %complex, %complex* %alloca, i32 0, i32 1
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%a2.0 = getelementptr inbounds %complex, %complex* %alloca, i32 0, i32 2, i32 0
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%r2.0 = getelementptr inbounds %complex, %complex* %random, i32 0, i32 2, i32 0
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%r2.1 = getelementptr inbounds %complex, %complex* %random, i32 0, i32 2, i32 1
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%r2.i = getelementptr inbounds %complex, %complex* %random, i32 0, i32 2, i32 %i
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%r2.1i = getelementptr inbounds i32, i32* %r2.1, i32 %i
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load i32, i32* %a2.0
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load i32, i32* %a1
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load i32, i32* %r2.0
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load i32, i32* %r2.1
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load i32, i32* %r2.i
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load i32, i32* %r2.1i
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ret void
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}
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; CHECK-LABEL: Function: complex2:
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; CHECK-DAG: NoAlias: i32* %alloca, i32* %p120
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; CHECK-DAG: MayAlias: i32* %alloca, i32* %pi20
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; CHECK-DAG: MayAlias: i32* %alloca, i32* %pij1
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; CHECK-DAG: MayAlias: i32* %a3, i32* %pij1
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%inner = type { i32, i32 }
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%outer = type { i32, i32, [10 x %inner] }
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declare %outer* @rand_outer(i32* %p)
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define void @complex2(i32 %i, i32 %j) {
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%alloca = alloca i32, i32 128
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%a3 = getelementptr inbounds i32, i32* %alloca, i32 3
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%random = call %outer* @rand_outer(i32* %alloca)
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%p120 = getelementptr inbounds %outer, %outer* %random, i32 1, i32 2, i32 2, i32 0
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%pi20 = getelementptr inbounds %outer, %outer* %random, i32 %i, i32 2, i32 2, i32 0
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%pij1 = getelementptr inbounds %outer, %outer* %random, i32 %i, i32 2, i32 %j, i32 1
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load i32, i32* %alloca
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load i32, i32* %a3
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load i32, i32* %p120
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load i32, i32* %pi20
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load i32, i32* %pij1
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ret void
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}
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; CHECK-LABEL: Function: pointer_offset:
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; CHECK-DAG: MayAlias: i32** %add.ptr, i32** %p1
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; CHECK-DAG: MayAlias: i32** %add.ptr, i32** %q2
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%struct.X = type { i32*, i32* }
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define i32 @pointer_offset(i32 signext %i, i32 signext %j, i32 zeroext %off) {
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entry:
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%i.addr = alloca i32
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%j.addr = alloca i32
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%x = alloca %struct.X
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store i32 %i, i32* %i.addr
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store i32 %j, i32* %j.addr
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%0 = bitcast %struct.X* %x to i8*
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%p1 = getelementptr inbounds %struct.X, %struct.X* %x, i32 0, i32 0
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store i32* %i.addr, i32** %p1
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%q2 = getelementptr inbounds %struct.X, %struct.X* %x, i32 0, i32 1
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store i32* %j.addr, i32** %q2
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%add.ptr = getelementptr inbounds i32*, i32** %q2, i32 %off
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%1 = load i32*, i32** %add.ptr
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%2 = load i32, i32* %1
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ret i32 %2
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}
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; CHECK-LABEL: Function: one_size_unknown:
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; CHECK: NoModRef: Ptr: i8* %p.minus1 <-> call void @llvm.memset.p0i8.i32(i8* %p, i8 0, i32 %size, i1 false)
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define void @one_size_unknown(i8* %p, i32 %size) {
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%p.minus1 = getelementptr inbounds i8, i8* %p, i32 -1
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call void @llvm.memset.p0i8.i32(i8* %p, i8 0, i32 %size, i1 false)
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load i8, i8* %p.minus1
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ret void
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}
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; If part of the addressing is done with non-inbounds GEPs, we can't use
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; properties implied by the last gep w/the whole offset. In this case,
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; %random = %alloc - 4 bytes is well defined, and results in %step == %alloca,
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; leaving %p as an entirely inbounds gep pointing inside %alloca
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; CHECK-LABEL: Function: all_inbounds:
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; CHECK: MayAlias: i32* %alloca, i8* %p0
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; CHECK: MayAlias: i32* %alloca, i8* %p1
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define void @all_inbounds() {
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%alloca = alloca i32, i32 4
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%random = call i8* @random.i8(i32* %alloca)
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%p0 = getelementptr inbounds i8, i8* %random, i8 0
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%step = getelementptr i8, i8* %random, i8 4
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%p1 = getelementptr inbounds i8, i8* %step, i8 2
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load i32, i32* %alloca
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load i8, i8* %p0
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load i8, i8* %p1
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ret void
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}
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; For all values of %x, %p0 and %p1 can't alias because %random would
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; have to be out of bounds (and thus a contradiction) for them to be equal.
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; CHECK-LABEL: Function: common_factor:
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; CHECK: NoAlias: i32* %p0, i32* %p1
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define void @common_factor(i32 %x) {
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%alloca = alloca i32, i32 4
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%random = call i8* @random.i8(i32* %alloca)
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%p0 = getelementptr inbounds i32, i32* %alloca, i32 %x
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%step = getelementptr inbounds i8, i8* %random, i8 4
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%step.bitcast = bitcast i8* %step to i32*
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%p1 = getelementptr inbounds i32, i32* %step.bitcast, i32 %x
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load i32, i32* %p0
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load i32, i32* %p1
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ret void
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}
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declare void @llvm.memset.p0i8.i32(i8*, i8, i32, i1)
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