38 lines · plain
1; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s2 3target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"4 5; BasicAA's guard against use-def cycles shouldn't prevent it from6; analyzing use-def dags.7 8; CHECK: MustAlias: i8* %base, i8* %phi9; CHECK: MustAlias: i16* %base, i8* %base10; CHECK: MustAlias: i16* %base, i8* %phi11define i8 @foo(ptr %base, i1 %x, i1 %w) {12entry:13 load i8, ptr %base14 br i1 %w, label %wa, label %wb15wa:16 load i8, ptr %base17 br label %wc18wb:19 load i8, ptr %base20 br label %wc21wc:22 %first = phi ptr [ %base, %wa ], [ %base, %wb ]23 br i1 %x, label %xa, label %xb24xa:25 br label %xc26xb:27 br label %xc28xc:29 %phi = phi ptr [ %first, %xa ], [ %first, %xb ]30 31 store i8 0, ptr %phi32 33 store i16 -1, ptr %base34 35 %loaded = load i8, ptr %phi36 ret i8 %loaded37}38