Add new TargetInfo hooks for getting the set of target-specific #defines.
llvm-svn: 38979
This commit is contained in:
parent
1f5ad11409
commit
2194ddc83d
|
@ -13,9 +13,13 @@
|
|||
|
||||
#include "clang/Basic/TargetInfo.h"
|
||||
#include "clang/Basic/Diagnostic.h"
|
||||
#include <map>
|
||||
using namespace llvm;
|
||||
using namespace clang;
|
||||
|
||||
void TargetInfoImpl::ANCHOR() {} // out-of-line virtual method for class.
|
||||
|
||||
|
||||
/// DiagnoseNonPortability - When a use of a non-portable target feature is
|
||||
/// used, this method emits the diagnostic and marks the translation unit as
|
||||
/// non-portable.
|
||||
|
@ -24,6 +28,112 @@ void TargetInfo::DiagnoseNonPortability(SourceLocation Loc, unsigned DiagKind) {
|
|||
if (Diag) Diag->Report(Loc, DiagKind);
|
||||
}
|
||||
|
||||
/// GetTargetDefineMap - Get the set of target #defines in an associative
|
||||
/// collection for easy lookup.
|
||||
static void GetTargetDefineMap(const TargetInfoImpl *Target,
|
||||
std::map<std::string, std::string> &Map) {
|
||||
std::vector<std::string> PrimaryDefines;
|
||||
Target->getTargetDefines(PrimaryDefines);
|
||||
|
||||
while (!PrimaryDefines.empty()) {
|
||||
const char *Str = PrimaryDefines.back().c_str();
|
||||
if (const char *Equal = strchr(Str, '=')) {
|
||||
// Split at the '='.
|
||||
Map.insert(std::make_pair(std::string(Str, Equal),
|
||||
std::string(Equal+1,
|
||||
Str+PrimaryDefines.back().size())));
|
||||
} else {
|
||||
// Remember "macroname=1".
|
||||
Map.insert(std::make_pair(PrimaryDefines.back(), std::string("1")));
|
||||
}
|
||||
PrimaryDefines.pop_back();
|
||||
}
|
||||
}
|
||||
|
||||
/// getTargetDefines - Appends the target-specific #define values for this
|
||||
/// target set to the specified buffer.
|
||||
void TargetInfo::getTargetDefines(std::vector<char> &Buffer) {
|
||||
// This is tricky in the face of secondary targets. Specifically,
|
||||
// target-specific #defines that are present and identical across all
|
||||
// secondary targets are turned into #defines, #defines that are present in
|
||||
// the primary target but are missing or different in the secondary targets
|
||||
// are turned into #define_target, and #defines that are not defined in the
|
||||
// primary, but are defined in a secondary are turned into
|
||||
// #define_other_target. This allows the preprocessor to correctly track uses
|
||||
// of target-specific macros.
|
||||
|
||||
// Get the set of primary #defines.
|
||||
std::map<std::string, std::string> PrimaryDefines;
|
||||
GetTargetDefineMap(PrimaryTarget, PrimaryDefines);
|
||||
|
||||
// Get the sets of secondary #defines.
|
||||
std::vector<std::map<std::string, std::string> > SecondaryDefines;
|
||||
SecondaryDefines.resize(SecondaryTargets.size());
|
||||
for (unsigned i = 0, e = SecondaryTargets.size(); i != e; ++i)
|
||||
GetTargetDefineMap(SecondaryTargets[i], SecondaryDefines[i]);
|
||||
|
||||
// Loop over all defines in the primary target, processing them until we run
|
||||
// out.
|
||||
while (!PrimaryDefines.empty()) {
|
||||
std::string DefineName = PrimaryDefines.begin()->first;
|
||||
std::string DefineValue = PrimaryDefines.begin()->second;
|
||||
PrimaryDefines.erase(PrimaryDefines.begin());
|
||||
|
||||
// Check to see whether all secondary targets have this #define and whether
|
||||
// it is to the same value. Remember if not, but remove the #define from
|
||||
// their collection in any case if they have it.
|
||||
bool isPortable = true;
|
||||
|
||||
for (unsigned i = 0, e = SecondaryDefines.size(); i != e; ++i) {
|
||||
std::map<std::string, std::string>::iterator I =
|
||||
SecondaryDefines[i].find(DefineName);
|
||||
if (I == SecondaryDefines[i].end()) {
|
||||
// Secondary target doesn't have this #define.
|
||||
isPortable = false;
|
||||
} else {
|
||||
// Secondary target has this define, remember if it disagrees.
|
||||
if (isPortable)
|
||||
isPortable = I->second == DefineValue;
|
||||
// Remove it from the secondary target unconditionally.
|
||||
SecondaryDefines[i].erase(I);
|
||||
}
|
||||
}
|
||||
|
||||
// If this define is non-portable, turn it into #define_target, otherwise
|
||||
// just use #define.
|
||||
const char *Command = isPortable ? "#define " : "#define_target ";
|
||||
Buffer.insert(Buffer.end(), Command, Command+strlen(Command));
|
||||
|
||||
// Insert "defname defvalue\n".
|
||||
Buffer.insert(Buffer.end(), DefineName.begin(), DefineName.end());
|
||||
Buffer.push_back(' ');
|
||||
Buffer.insert(Buffer.end(), DefineValue.begin(), DefineValue.end());
|
||||
Buffer.push_back('\n');
|
||||
}
|
||||
|
||||
// Now that all of the primary target's defines have been handled and removed
|
||||
// from the secondary target's define sets, go through the remaining secondary
|
||||
// target's #defines and taint them.
|
||||
for (unsigned i = 0, e = SecondaryDefines.size(); i != e; ++i) {
|
||||
std::map<std::string, std::string> &Defs = SecondaryDefines[i];
|
||||
while (!Defs.empty()) {
|
||||
const std::string &DefName = Defs.begin()->first;
|
||||
|
||||
// Insert "#define_other_target defname".
|
||||
const char *Command = "#define_other_target ";
|
||||
Buffer.insert(Buffer.end(), Command, Command+strlen(Command));
|
||||
Buffer.insert(Buffer.end(), DefName.begin(), DefName.end());
|
||||
Buffer.push_back('\n');
|
||||
|
||||
// If any other secondary targets have this same define, remove it from
|
||||
// them to avoid duplicate #define_other_target directives.
|
||||
for (unsigned j = i+1; j != e; ++j)
|
||||
SecondaryDefines[j].erase(DefName);
|
||||
|
||||
Defs.erase(Defs.begin());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// ComputeWCharWidth - Determine the width of the wchar_t type for the primary
|
||||
/// target, diagnosing whether this is non-portable across the secondary
|
||||
|
|
|
@ -16,6 +16,7 @@
|
|||
|
||||
#include "clang/Basic/SourceLocation.h"
|
||||
#include <vector>
|
||||
#include <string>
|
||||
|
||||
namespace llvm {
|
||||
namespace clang {
|
||||
|
@ -85,6 +86,10 @@ public:
|
|||
|
||||
///===---- Target property query methods --------------------------------===//
|
||||
|
||||
/// getTargetDefines - Appends the target-specific #define values for this
|
||||
/// target set to the specified buffer.
|
||||
void getTargetDefines(std::vector<char> &DefineBuffer);
|
||||
|
||||
/// getWCharWidth - Return the size of wchar_t in bytes.
|
||||
///
|
||||
unsigned getWCharWidth(SourceLocation Loc) {
|
||||
|
@ -108,11 +113,19 @@ protected:
|
|||
unsigned WCharWidth; /// sizeof(wchar_t) in bytes. Default value is 4.
|
||||
public:
|
||||
TargetInfoImpl() : WCharWidth(4) {}
|
||||
virtual ~TargetInfoImpl() {}
|
||||
|
||||
/// getTargetDefines - Return a list of the target-specific #define values set
|
||||
/// when compiling to this target. Each string should be of the form "X",
|
||||
/// which results in '#define X 1' or "X=Y" which results in "#define X Y"
|
||||
virtual void getTargetDefines(std::vector<std::string> &Defines) const = 0;
|
||||
|
||||
/// getWCharWidth - Return the size of wchar_t in bytes.
|
||||
///
|
||||
unsigned getWCharWidth() const { return WCharWidth; }
|
||||
|
||||
private:
|
||||
virtual void ANCHOR(); // out-of-line virtual method for class.
|
||||
};
|
||||
|
||||
} // end namespace clang
|
||||
|
|
Loading…
Reference in New Issue