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- ; 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
- }
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