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Commit first round work of PR1373. "noalias" is now fully supported in

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VMCore, BitCode, and Assembly. Documentation and test case paramattrs.ll
updated also.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37432 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Zhou Sheng 2007-06-05 05:28:26 +00:00
parent 45beb482c4
commit febca3499e
7 changed files with 18 additions and 6 deletions
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3
docs/LangRef.html
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@ -784,6 +784,9 @@ a power of 2.</p>
<dt><tt>sret</tt></dt>
<dd>This indicates that the parameter specifies the address of a structure
that is the return value of the function in the source program.</dd>
<dt><tt>noalias</tt></dt>
<dd>This indicates that the parameter not alias any other object or any
other "noalias" objects during the function call.
<dt><tt>noreturn</tt></dt>
<dd>This function attribute indicates that the function never returns. This
indicates to LLVM that every call to this function should be treated as if

3
include/llvm/ParameterAttributes.h
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@ -35,7 +35,8 @@ enum Attributes {
NoReturn = 1 << 2, ///< mark the function as not returning
InReg = 1 << 3, ///< force argument to be passed in register
StructRet = 1 << 4, ///< hidden pointer to structure to return
NoUnwind = 1 << 5 ///< Function doesn't unwind stack
NoUnwind = 1 << 5, ///< Function doesn't unwind stack
NoAlias = 1 << 6 ///< Considered to not alias after call.
};
}

1
lib/AsmParser/Lexer.l
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@ -229,6 +229,7 @@ inreg { return INREG; }
sret { return SRET; }
nounwind { return NOUNWIND; }
noreturn { return NORETURN; }
noalias { return NOALIAS; }
void { RET_TY(Type::VoidTy, VOID); }
float { RET_TY(Type::FloatTy, FLOAT); }

11
lib/AsmParser/llvmAsmParser.y
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@ -1101,7 +1101,7 @@ Module *llvm::RunVMAsmParser(const char * AsmString, Module * M) {
%token <OtherOpVal> EXTRACTELEMENT INSERTELEMENT SHUFFLEVECTOR
// Function Attributes
%token NORETURN INREG SRET NOUNWIND
%token NORETURN INREG SRET NOUNWIND NOALIAS
// Visibility Styles
%token DEFAULT HIDDEN PROTECTED
@ -1224,10 +1224,11 @@ OptCallingConv : /*empty*/ { $$ = CallingConv::C; } |
CHECK_FOR_ERROR
};
ParamAttr : ZEXT { $$ = ParamAttr::ZExt; }
| SEXT { $$ = ParamAttr::SExt; }
| INREG { $$ = ParamAttr::InReg; }
| SRET { $$ = ParamAttr::StructRet; }
ParamAttr : ZEXT { $$ = ParamAttr::ZExt; }
| SEXT { $$ = ParamAttr::SExt; }
| INREG { $$ = ParamAttr::InReg; }
| SRET { $$ = ParamAttr::StructRet; }
| NOALIAS { $$ = ParamAttr::NoAlias; }
;
OptParamAttrs : /* empty */ { $$ = ParamAttr::None; }

2
lib/VMCore/Function.cpp
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@ -99,6 +99,8 @@ ParamAttrsList::getParamAttrsText(uint16_t Attrs) {
Result += "nounwind ";
if (Attrs & ParamAttr::InReg)
Result += "inreg ";
if (Attrs & ParamAttr::NoAlias)
Result += "noalias ";
if (Attrs & ParamAttr::StructRet)
Result += "sret ";
return Result;

2
test/Feature/paramattrs.ll
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@ -8,6 +8,8 @@
declare i16 @"test"(i16 sext %arg) sext
declare i8 @"test2" (i16 zext %a2) zext
declare i32 @"test3"(i32* noalias %p)
declare void @exit(i32) noreturn nounwind
define i32 @main(i32 %argc, i8 **%argv) nounwind inreg {

2
tools/llvm2cpp/CppWriter.cpp
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@ -473,6 +473,8 @@ CppWriter::printTypeInternal(const Type* Ty) {
Out << " | ParamAttr::SExt";
if (attrs & ParamAttr::ZExt)
Out << " | ParamAttr::ZExt";
if (attrs & ParamAttr::NoAlias)
Out << " | ParamAttr::NoAlias";
if (attrs & ParamAttr::StructRet)
Out << " | ParamAttr::StructRet";
if (attrs & ParamAttr::InReg)