forked from OSchip/llvm-project
55 lines
1.8 KiB
LLVM
55 lines
1.8 KiB
LLVM
; RUN: opt < %s -disable-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s
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; When merging MustAlias and PartialAlias, merge to PartialAlias
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; instead of MayAlias.
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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"
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; FIXME: This could be PartialAlias but CFLSteensAA can't currently prove it
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; CHECK: MayAlias: i16* %bigbase0, i8* %phi
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define i8 @test0(i1 %x) {
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entry:
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%base = alloca i8, align 4
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%baseplusone = getelementptr i8, i8* %base, i64 1
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br i1 %x, label %red, label %green
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red:
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br label %green
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green:
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%phi = phi i8* [ %baseplusone, %red ], [ %base, %entry ]
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store i8 0, i8* %phi
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%bigbase0 = bitcast i8* %base to i16*
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store i16 -1, i16* %bigbase0
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%loaded = load i8, i8* %phi
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ret i8 %loaded
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}
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; FIXME: This could be PartialAlias but CFLSteensAA can't currently prove it
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; CHECK: MayAlias: i16* %bigbase1, i8* %sel
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define i8 @test1(i1 %x) {
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entry:
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%base = alloca i8, align 4
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%baseplusone = getelementptr i8, i8* %base, i64 1
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%sel = select i1 %x, i8* %baseplusone, i8* %base
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store i8 0, i8* %sel
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%bigbase1 = bitcast i8* %base to i16*
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store i16 -1, i16* %bigbase1
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%loaded = load i8, i8* %sel
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ret i8 %loaded
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}
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; Incoming pointer arguments should not be PartialAlias because we do not know their initial state
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; even if they are nocapture
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; CHECK: MayAlias: double* %A, double* %Index
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define void @testr2(double* nocapture readonly %A, double* nocapture readonly %Index) {
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%arrayidx22 = getelementptr inbounds double, double* %Index, i64 2
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%1 = load double, double* %arrayidx22
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%arrayidx25 = getelementptr inbounds double, double* %A, i64 2
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%2 = load double, double* %arrayidx25
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%mul26 = fmul double %1, %2
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ret void
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}
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