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Diffstat (limited to 'llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg-multilevel.ll')
| -rw-r--r-- | llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg-multilevel.ll | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg-multilevel.ll b/llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg-multilevel.ll new file mode 100644 index 00000000000..f5b61687ad7 --- /dev/null +++ b/llvm/test/Analysis/CFLAliasAnalysis/Steensgaard/interproc-store-arg-multilevel.ll @@ -0,0 +1,48 @@ +; This testcase ensures that CFL AA answers queries soundly when callee tries +; to mutate the memory pointed to by its parameters + +; RUN: opt < %s -disable-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s +; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s + +declare noalias i8* @malloc(i64) + +define void @store_arg_multilevel_callee(i32*** %arg1, i32* %arg2) { + %ptr = call noalias i8* @malloc(i64 8) + %ptr_cast = bitcast i8* %ptr to i32** + store i32* %arg2, i32** %ptr_cast + store i32** %ptr_cast, i32*** %arg1 + ret void +} +; CHECK-LABEL: Function: test_store_arg_multilevel +; CHECK: NoAlias: i32* %a, i32** %lpp +; CHECK: NoAlias: i32* %b, i32** %lpp +; CHECK: MayAlias: i32** %lpp, i32** %p +; CHECK: MayAlias: i32* %a, i32* %lpp_deref +; CHECK: MayAlias: i32* %b, i32* %lpp_deref +; CHECK: NoAlias: i32* %lpp_deref, i32** %p +; CHECK: NoAlias: i32* %lpp_deref, i32*** %pp +; CHECK: NoAlias: i32* %lpp_deref, i32** %lpp +; CHECK: MayAlias: i32* %a, i32* %lp +; CHECK: NoAlias: i32* %lp, i32*** %pp +; CHECK: NoAlias: i32* %lp, i32** %lpp +; CHECK: MayAlias: i32* %lp, i32* %lpp_deref + +; We could've proven the following facts if the analysis were inclusion-based: +; NoAlias: i32* %a, i32* %b +; NoAlias: i32* %b, i32* %lp +define void @test_store_arg_multilevel() { + %a = alloca i32, align 4 + %b = alloca i32, align 4 + %p = alloca i32*, align 8 + %pp = alloca i32**, align 8 + + store i32* %a, i32** %p + store i32** %p, i32*** %pp + call void @store_arg_multilevel_callee(i32*** %pp, i32* %b) + + %lpp = load i32**, i32*** %pp + %lpp_deref = load i32*, i32** %lpp + %lp = load i32*, i32** %p + + ret void +}
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