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Add Alignment field to ParameterAttributes and

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treat more or less rationally in interface
functions, subject to change.  No functional change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47352 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2008-02-19 23:51:49 +00:00
parent e9c608d6cc
commit 6167c3fcda
2 changed files with 25 additions and 1 deletions
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2
include/llvm/ParameterAttributes.h
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@ -47,6 +47,8 @@ const Attributes ByVal = 1<<7; ///< Pass structure by value
const Attributes Nest = 1<<8; ///< Nested function static chain
const Attributes ReadNone = 1<<9; ///< Function does not access memory
const Attributes ReadOnly = 1<<10; ///< Function only reads from memory
const Attributes Alignment = 0xffff<<16; ///< Alignment of parameter (16 bits)
// 0 = unknown, else in clear (not log)
/// @brief Attributes that only apply to function parameters.
const Attributes ParameterOnly = ByVal | InReg | Nest | StructRet;

24
lib/VMCore/ParameterAttributes.cpp
View File

@ -14,6 +14,7 @@
#include "llvm/ParameterAttributes.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Support/ManagedStatic.h"
#include <sstream>
using namespace llvm;
@ -68,13 +69,20 @@ ParamAttrsList::getParamAttrsText(ParameterAttributes Attrs) {
Result += "readnone ";
if (Attrs & ParamAttr::ReadOnly)
Result += "readonly ";
if (Attrs & ParamAttr::Alignment) {
std::stringstream s;
s << ((Attrs & ParamAttr::Alignment) >> 16);
Result += "align ";
Result += s.str();
Result += " ";
}
return Result;
}
void ParamAttrsList::Profile(FoldingSetNodeID &ID,
const ParamAttrsVector &Attrs) {
for (unsigned i = 0; i < Attrs.size(); ++i)
ID.AddInteger(unsigned(Attrs[i].attrs) << 16 | unsigned(Attrs[i].index));
ID.AddInteger(uint64_t(Attrs[i].attrs) << 16 | unsigned(Attrs[i].index));
}
const ParamAttrsList *
@ -173,6 +181,15 @@ ParamAttrsList::includeAttrs(const ParamAttrsList *PAL,
uint16_t idx, ParameterAttributes attrs) {
ParameterAttributes OldAttrs = PAL ? PAL->getParamAttrs(idx) :
ParamAttr::None;
#ifndef NDEBUG
// FIXME it is not obvious how this should work for alignment.
// For now, say we can't change a known alignment.
ParameterAttributes OldAlign = OldAttrs & ParamAttr::Alignment;
ParameterAttributes NewAlign = attrs & ParamAttr::Alignment;
assert(!OldAlign || !NewAlign || OldAlign == NewAlign &&
"Attempt to change alignment!");
#endif
ParameterAttributes NewAttrs = OldAttrs | attrs;
if (NewAttrs == OldAttrs)
return PAL;
@ -185,6 +202,11 @@ ParamAttrsList::includeAttrs(const ParamAttrsList *PAL,
const ParamAttrsList *
ParamAttrsList::excludeAttrs(const ParamAttrsList *PAL,
uint16_t idx, ParameterAttributes attrs) {
#ifndef NDEBUG
// FIXME it is not obvious how this should work for alignment.
// For now, say we can't pass in alignment, which no current use does.
assert(!(attrs & ParamAttr::Alignment) && "Attempt to exclude alignment!");
#endif
ParameterAttributes OldAttrs = PAL ? PAL->getParamAttrs(idx) :
ParamAttr::None;
ParameterAttributes NewAttrs = OldAttrs & ~attrs;