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Add InaccessibleMemOnly and inaccessibleMemOrArgMemOnly attributes

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Summary:
This patch introduces two new function attributes 

InaccessibleMemOnly: This attribute indicates that the function may only access memory that is not accessible by the program/IR being compiled. This is a weaker form of ReadNone.
inaccessibleMemOrArgMemOnly: This attribute indicates that the function may only access memory that is either not accessible by the program/IR being compiled, or is pointed to by its pointer arguments. This is a weaker form of  ArgMemOnly

Test cases have been updated. This revision uses this (d001932f3a) as reference.

Reviewers: jmolloy, hfinkel

Subscribers: reames, joker.eph, llvm-commits

Differential Revision: http://reviews.llvm.org/D15499

llvm-svn: 255778
This commit is contained in:
Vaivaswatha Nagaraj
2015-12-16 16:16:19 +00:00
parent 10120189ab
commit fb3f4907c0
19 changed files with 105 additions and 14 deletions
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4
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -178,6 +178,10 @@ static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
return bitc::ATTR_KIND_IN_ALLOCA;
case Attribute::Cold:
return bitc::ATTR_KIND_COLD;
case Attribute::InaccessibleMemOnly:
return bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY;
case Attribute::InaccessibleMemOrArgMemOnly:
return bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY;
case Attribute::InlineHint:
return bitc::ATTR_KIND_INLINE_HINT;
case Attribute::InReg: