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| author | Hal Finkel <hfinkel@anl.gov> | 2016-07-11 01:32:20 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2016-07-11 01:32:20 +0000 |
| commit | 5c12d8fe8f7ac9a3ec13ddad1561d63477e014f6 (patch) | |
| tree | dd44cb608cfc199b1e9db70058b537669b386dcb /llvm/test | |
| parent | 47646c09818bd3571d72b3f0e312b1f301ec66ee (diff) | |
| download | bcm5719-llvm-5c12d8fe8f7ac9a3ec13ddad1561d63477e014f6.tar.gz bcm5719-llvm-5c12d8fe8f7ac9a3ec13ddad1561d63477e014f6.zip | |
BasicAA should look through functions with returned arguments
Motivated by the work on the llvm.noalias intrinsic, teach BasicAA to look
through returned-argument functions when answering queries. This is essential
so that we don't loose all other AA information when supplementing with
llvm.noalias.
Differential Revision: http://reviews.llvm.org/D9383
llvm-svn: 275035
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/Analysis/BasicAA/returned.ll | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/llvm/test/Analysis/BasicAA/returned.ll b/llvm/test/Analysis/BasicAA/returned.ll new file mode 100644 index 00000000000..c6ef6806140 --- /dev/null +++ b/llvm/test/Analysis/BasicAA/returned.ll @@ -0,0 +1,45 @@ +; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s + +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" + +%struct = type { i32, i32, i32 } + +; CHECK-LABEL: test_simple + +; CHECK-DAG: MustAlias: %struct* %st, %struct* %sta + +; CHECK-DAG: PartialAlias: %struct* %st, i32* %x +; CHECK-DAG: PartialAlias: %struct* %st, i32* %y +; CHECK-DAG: PartialAlias: %struct* %st, i32* %z + +; CHECK-DAG: NoAlias: i32* %x, i32* %y +; CHECK-DAG: NoAlias: i32* %x, i32* %z +; CHECK-DAG: NoAlias: i32* %y, i32* %z + +; CHECK-DAG: PartialAlias: %struct* %st, %struct* %y_12 +; CHECK-DAG: PartialAlias: %struct* %y_12, i32* %x +; CHECK-DAG: PartialAlias: i32* %x, i80* %y_10 + +; CHECK-DAG: PartialAlias: %struct* %st, i64* %y_8 +; CHECK-DAG: PartialAlias: i32* %z, i64* %y_8 +; CHECK-DAG: NoAlias: i32* %x, i64* %y_8 + +; CHECK-DAG: MustAlias: %struct* %y_12, i32* %y +; CHECK-DAG: MustAlias: i32* %y, i64* %y_8 +; CHECK-DAG: MustAlias: i32* %y, i80* %y_10 + +define void @test_simple(%struct* %st, i64 %i, i64 %j, i64 %k) { + %x = getelementptr %struct, %struct* %st, i64 %i, i32 0 + %y = getelementptr %struct, %struct* %st, i64 %j, i32 1 + %sta = call %struct* @func2(%struct* %st) + %z = getelementptr %struct, %struct* %sta, i64 %k, i32 2 + %y_12 = bitcast i32* %y to %struct* + %y_10 = bitcast i32* %y to i80* + %ya = call i32* @func1(i32* %y) + %y_8 = bitcast i32* %ya to i64* + ret void +} + +declare i32* @func1(i32* returned) nounwind +declare %struct* @func2(%struct* returned) nounwind + |
