57d57b1afd
With opaque pointers, we cannot use the pointer element type to determine the LocationSize for the AA query. Instead, -aa-eval tests are now required to have an explicit load or store for any pointer they want to compute alias results for, and the load/store types are used to determine the location size. This may affect ordering of results, and sorting within one result, as the type is not considered part of the sorted string anymore. To somewhat minimize the churn, printing still uses faux typed pointer notation.
45 lines
1.2 KiB
LLVM
45 lines
1.2 KiB
LLVM
; RUN: opt < %s -aa-pipeline=basic-aa -passes=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:
|
|
load i8, i8* %base
|
|
br i1 %w, label %wa, label %wb
|
|
wa:
|
|
%wwa = bitcast i8* %base to i8*
|
|
load i8, i8* %wwa
|
|
br label %wc
|
|
wb:
|
|
%wwb = bitcast i8* %base to i8*
|
|
load i8, i8* %wwb
|
|
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
|
|
}
|