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Define Neon load/store intrinsics for Clang as macros instead of functions.

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This is needed so the front-end can see "aligned" attributes on the type
for the pointer arguments.  Radar 9311427.

llvm-svn: 129964
This commit is contained in:
Bob Wilson 2011-04-22 00:37:01 +00:00
parent 717fc5112a
commit dbe2447934
1 changed files with 51 additions and 15 deletions
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66
utils/TableGen/NeonEmitter.cpp
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@ -462,9 +462,34 @@ static std::string MangleName(const std::string &name, StringRef typestr,
return s;
}
/// UseMacro - Examine the prototype string to determine if the intrinsic
/// should be defined as a preprocessor macro instead of an inline function.
static bool UseMacro(const std::string &proto) {
// If this builtin takes an immediate argument, we need to #define it rather
// than use a standard declaration, so that SemaChecking can range check
// the immediate passed by the user.
if (proto.find('i') != std::string::npos)
return true;
// Pointer arguments need to use macros to avoid hiding aligned attributes
// from the pointer type.
if (proto.find('p') != std::string::npos ||
proto.find('c') != std::string::npos)
return true;
return false;
}
/// MacroArgUsedDirectly - Return true if argument i for an intrinsic that is
/// defined as a macro should be accessed directly instead of being first
/// assigned to a local temporary.
static bool MacroArgUsedDirectly(const std::string &proto, unsigned i) {
return (proto[i] == 'i' || proto[i] == 'p' || proto[i] == 'c');
}
// Generate the string "(argtype a, argtype b, ...)"
static std::string GenArgs(const std::string &proto, StringRef typestr) {
bool define = proto.find('i') != std::string::npos;
bool define = UseMacro(proto);
char arg = 'a';
std::string s;
@ -472,10 +497,10 @@ static std::string GenArgs(const std::string &proto, StringRef typestr) {
for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
if (define) {
// Immediate macro arguments are used directly instead of being assigned
// Some macro arguments are used directly instead of being assigned
// to local temporaries; prepend an underscore prefix to make their
// names consistent with the local temporaries.
if (proto[i] == 'i')
if (MacroArgUsedDirectly(proto, i))
s += "__";
} else {
s += TypeString(proto[i], typestr) + " __";
@ -494,11 +519,28 @@ static std::string GenArgs(const std::string &proto, StringRef typestr) {
static std::string GenMacroLocals(const std::string &proto, StringRef typestr) {
char arg = 'a';
std::string s;
bool generatedLocal = false;
for (unsigned i = 1, e = proto.size(); i != e; ++i, ++arg) {
// Do not create a temporary for an immediate argument.
// That would defeat the whole point of using a macro!
if (proto[i] == 'i') continue;
if (proto[i] == 'i')
continue;
generatedLocal = true;
// For other (non-immediate) arguments that are used directly, a local
// temporary is still needed to get the correct type checking, even though
// that temporary is not used for anything.
if (MacroArgUsedDirectly(proto, i)) {
s += TypeString(proto[i], typestr) + " __";
s.push_back(arg);
s += "_ = (__";
s.push_back(arg);
s += "); (void)__";
s.push_back(arg);
s += "_; ";
continue;
}
s += TypeString(proto[i], typestr) + " __";
s.push_back(arg);
@ -507,7 +549,8 @@ static std::string GenMacroLocals(const std::string &proto, StringRef typestr) {
s += "); ";
}
s += "\\\n ";
if (generatedLocal)
s += "\\\n ";
return s;
}
@ -568,11 +611,7 @@ static std::string GenOpString(OpKind op, const std::string &proto,
StringRef typestr) {
bool quad;
unsigned nElts = GetNumElements(typestr, quad);
// If this builtin takes an immediate argument, we need to #define it rather
// than use a standard declaration, so that SemaChecking can range check
// the immediate passed by the user.
bool define = proto.find('i') != std::string::npos;
bool define = UseMacro(proto);
std::string ts = TypeString(proto[0], typestr);
std::string s;
@ -858,10 +897,7 @@ static std::string GenBuiltin(const std::string &name, const std::string &proto,
// sret-like argument.
bool sret = (proto[0] >= '2' && proto[0] <= '4');
// If this builtin takes an immediate argument, we need to #define it rather
// than use a standard declaration, so that SemaChecking can range check
// the immediate passed by the user.
bool define = proto.find('i') != std::string::npos;
bool define = UseMacro(proto);
// Check if the prototype has a scalar operand with the type of the vector
// elements. If not, bitcasting the args will take care of arg checking.
@ -999,7 +1035,7 @@ static std::string GenIntrinsic(const std::string &name,
StringRef outTypeStr, StringRef inTypeStr,
OpKind kind, ClassKind classKind) {
assert(!proto.empty() && "");
bool define = proto.find('i') != std::string::npos;
bool define = UseMacro(proto);
std::string s;
// static always inline + return type