2017-03-01 21:19:51 +08:00
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; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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declare void @readonly_attr(i8* readonly nocapture)
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declare void @writeonly_attr(i8* writeonly nocapture)
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declare void @readnone_attr(i8* readnone nocapture)
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declare void @readonly_func(i8* nocapture) readonly
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declare void @writeonly_func(i8* nocapture) writeonly
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declare void @readnone_func(i8* nocapture) readnone
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declare void @read_write(i8* writeonly nocapture, i8* readonly nocapture, i8* readnone nocapture)
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declare void @func()
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define void @test(i8* noalias %p) {
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entry:
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call void @readonly_attr(i8* %p)
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call void @readonly_func(i8* %p)
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call void @writeonly_attr(i8* %p)
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call void @writeonly_func(i8* %p)
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call void @readnone_attr(i8* %p)
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call void @readnone_func(i8* %p)
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call void @read_write(i8* %p, i8* %p, i8* %p)
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call void @func() ["deopt" (i8* %p)]
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call void @writeonly_attr(i8* %p) ["deopt" (i8* %p)]
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ret void
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}
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[ModRefInfo] Add must alias info to ModRefInfo.
Summary:
Add an additional bit to ModRefInfo, ModRefInfo::Must, to be cleared for known must aliases.
Shift existing Mod/Ref/ModRef values to include an additional most
significant bit. Update wrappers that modify ModRefInfo values to
reflect the change.
Notes:
* ModRefInfo::Must is almost entirely cleared in the AAResults methods, the remaining changes are trying to preserve it.
* Only some small changes to make custom AA passes set ModRefInfo::Must (BasicAA).
* GlobalsModRef already declares a bit, who's meaning overlaps with the most significant bit in ModRefInfo (MayReadAnyGlobal). No changes to shift the value of MayReadAnyGlobal (see AlignedMap). FunctionInfo.getModRef() ajusts most significant bit so correctness is preserved, but the Must info is lost.
* There are cases where the ModRefInfo::Must is not set, e.g. 2 calls that only read will return ModRefInfo::NoModRef, though they may read from exactly the same location.
Reviewers: dberlin, hfinkel, george.burgess.iv
Subscribers: llvm-commits, sanjoy
Differential Revision: https://reviews.llvm.org/D38862
llvm-svn: 321309
2017-12-22 05:41:53 +08:00
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; CHECK: Just Ref (MustAlias): Ptr: i8* %p <-> call void @readonly_attr(i8* %p)
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2017-03-01 21:19:51 +08:00
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; CHECK: Just Ref: Ptr: i8* %p <-> call void @readonly_func(i8* %p)
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[ModRefInfo] Add must alias info to ModRefInfo.
Summary:
Add an additional bit to ModRefInfo, ModRefInfo::Must, to be cleared for known must aliases.
Shift existing Mod/Ref/ModRef values to include an additional most
significant bit. Update wrappers that modify ModRefInfo values to
reflect the change.
Notes:
* ModRefInfo::Must is almost entirely cleared in the AAResults methods, the remaining changes are trying to preserve it.
* Only some small changes to make custom AA passes set ModRefInfo::Must (BasicAA).
* GlobalsModRef already declares a bit, who's meaning overlaps with the most significant bit in ModRefInfo (MayReadAnyGlobal). No changes to shift the value of MayReadAnyGlobal (see AlignedMap). FunctionInfo.getModRef() ajusts most significant bit so correctness is preserved, but the Must info is lost.
* There are cases where the ModRefInfo::Must is not set, e.g. 2 calls that only read will return ModRefInfo::NoModRef, though they may read from exactly the same location.
Reviewers: dberlin, hfinkel, george.burgess.iv
Subscribers: llvm-commits, sanjoy
Differential Revision: https://reviews.llvm.org/D38862
llvm-svn: 321309
2017-12-22 05:41:53 +08:00
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; CHECK: Just Mod (MustAlias): Ptr: i8* %p <-> call void @writeonly_attr(i8* %p)
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2017-03-01 21:19:51 +08:00
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; CHECK: Just Mod: Ptr: i8* %p <-> call void @writeonly_func(i8* %p)
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; CHECK: NoModRef: Ptr: i8* %p <-> call void @readnone_attr(i8* %p)
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; CHECK: NoModRef: Ptr: i8* %p <-> call void @readnone_func(i8* %p)
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; CHECK: Both ModRef: Ptr: i8* %p <-> call void @read_write(i8* %p, i8* %p, i8* %p)
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[ModRefInfo] Add must alias info to ModRefInfo.
Summary:
Add an additional bit to ModRefInfo, ModRefInfo::Must, to be cleared for known must aliases.
Shift existing Mod/Ref/ModRef values to include an additional most
significant bit. Update wrappers that modify ModRefInfo values to
reflect the change.
Notes:
* ModRefInfo::Must is almost entirely cleared in the AAResults methods, the remaining changes are trying to preserve it.
* Only some small changes to make custom AA passes set ModRefInfo::Must (BasicAA).
* GlobalsModRef already declares a bit, who's meaning overlaps with the most significant bit in ModRefInfo (MayReadAnyGlobal). No changes to shift the value of MayReadAnyGlobal (see AlignedMap). FunctionInfo.getModRef() ajusts most significant bit so correctness is preserved, but the Must info is lost.
* There are cases where the ModRefInfo::Must is not set, e.g. 2 calls that only read will return ModRefInfo::NoModRef, though they may read from exactly the same location.
Reviewers: dberlin, hfinkel, george.burgess.iv
Subscribers: llvm-commits, sanjoy
Differential Revision: https://reviews.llvm.org/D38862
llvm-svn: 321309
2017-12-22 05:41:53 +08:00
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; CHECK: Just Ref (MustAlias): Ptr: i8* %p <-> call void @func() [ "deopt"(i8* %p) ]
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2017-03-01 21:19:51 +08:00
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; CHECK: Both ModRef: Ptr: i8* %p <-> call void @writeonly_attr(i8* %p) [ "deopt"(i8* %p) ]
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