| ; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s |
| |
| target 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" |
| |
| ; BasicAA's guard against use-def cycles shouldn't prevent it from |
| ; analyzing use-def dags. |
| |
| ; CHECK: MustAlias: i8* %base, i8* %phi |
| ; CHECK: MustAlias: i8* %phi, i8* %wwa |
| ; CHECK: MustAlias: i8* %phi, i8* %wwb |
| ; CHECK: MustAlias: i16* %bigbase, i8* %phi |
| define i8 @foo(i8* %base, i1 %x, i1 %w) { |
| entry: |
| br i1 %w, label %wa, label %wb |
| wa: |
| %wwa = bitcast i8* %base to i8* |
| br label %wc |
| wb: |
| %wwb = bitcast i8* %base to i8* |
| br label %wc |
| wc: |
| %first = phi i8* [ %wwa, %wa ], [ %wwb, %wb ] |
| %fc = bitcast i8* %first to i8* |
| br i1 %x, label %xa, label %xb |
| xa: |
| %xxa = bitcast i8* %fc to i8* |
| br label %xc |
| xb: |
| %xxb = bitcast i8* %fc to i8* |
| br label %xc |
| xc: |
| %phi = phi i8* [ %xxa, %xa ], [ %xxb, %xb ] |
| |
| store i8 0, i8* %phi |
| |
| %bigbase = bitcast i8* %base to i16* |
| store i16 -1, i16* %bigbase |
| |
| %loaded = load i8, i8* %phi |
| ret i8 %loaded |
| } |
