source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/BasicAA/dag.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 1.1 KB
Line 
1; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s
2
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 from
6; analyzing use-def dags.
7
8; CHECK: MustAlias:  i8* %base, i8* %phi
9; CHECK: MustAlias: i8* %phi, i8* %wwa
10; CHECK: MustAlias: i8* %phi, i8* %wwb
11; CHECK: MustAlias: i16* %bigbase, i8* %phi
12define i8 @foo(i8* %base, i1 %x, i1 %w) {
13entry:
14  br i1 %w, label %wa, label %wb
15wa:
16  %wwa = bitcast i8* %base to i8*
17  br label %wc
18wb:
19  %wwb = bitcast i8* %base to i8*
20  br label %wc
21wc:
22  %first = phi i8* [ %wwa, %wa ], [ %wwb, %wb ]
23  %fc = bitcast i8* %first to i8*
24  br i1 %x, label %xa, label %xb
25xa:
26  %xxa = bitcast i8* %fc to i8*
27  br label %xc
28xb:
29  %xxb = bitcast i8* %fc to i8*
30  br label %xc
31xc:
32  %phi = phi i8* [ %xxa, %xa ], [ %xxb, %xb ]
33
34  store i8 0, i8* %phi
35
36  %bigbase = bitcast i8* %base to i16*
37  store i16 -1, i16* %bigbase
38
39  %loaded = load i8, i8* %phi
40  ret i8 %loaded
41}
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