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Provide a hook to set the code generation debug options to investigate lto failures.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53119 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2008-07-03 22:53:14 +00:00
parent a122f2f51e
commit a93ae711a9
4 changed files with 29 additions and 2 deletions
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5
include/llvm-c/lto.h
View File

@ -227,6 +227,11 @@ extern const void*
lto_codegen_compile(lto_code_gen_t cg, size_t* length);
/**
* Sets options to help debug codegen bugs.
*/
extern void
lto_codegen_debug_options(lto_code_gen_t cg, const char *);
#ifdef __cplusplus
}
#endif

14
tools/lto/LTOCodeGenerator.cpp
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@ -40,6 +40,7 @@
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
@ -116,7 +117,6 @@ bool LTOCodeGenerator::setCodePICModel(lto_codegen_model model,
return true;
}
void LTOCodeGenerator::addMustPreserveSymbol(const char* sym)
{
_mustPreserveSymbols[sym] = 1;
@ -334,6 +334,18 @@ bool LTOCodeGenerator::generateAssemblyCode(std::ostream& out, std::string& errM
break;
}
for (unsigned opt_index = 0, opt_size = _codegenOptions.size();
opt_index < opt_size; ++opt_index) {
std::vector<const char *> cgOpts;
std::string &optString = _codegenOptions[opt_index];
for (std::string Opt = getToken(optString);
!Opt.empty(); Opt = getToken(optString))
cgOpts.push_back(Opt.c_str());
int pseudo_argc = cgOpts.size()-1;
cl::ParseCommandLineOptions(pseudo_argc, (char**)&cgOpts[0]);
}
// Instantiate the pass manager to organize the passes.
PassManager passes;

6
tools/lto/LTOCodeGenerator.h
View File

@ -17,6 +17,7 @@
#include "llvm/Linker.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/SmallVector.h"
#include <string>
@ -38,7 +39,9 @@ public:
bool writeMergedModules(const char* path,
std::string& errMsg);
const void* compile(size_t* length, std::string& errMsg);
void setCodeGenDebugOptions(const char *opts) {
_codegenOptions.push_back(std::string(opts));
}
private:
bool generateAssemblyCode(std::ostream& out,
std::string& errMsg);
@ -56,6 +59,7 @@ private:
lto_codegen_model _codeModel;
StringSet _mustPreserveSymbols;
llvm::MemoryBuffer* _nativeObjectFile;
llvm::SmallVector<std::string, 4> _codegenOptions;
};
#endif // LTO_CODE_GENERATOR_H

6
tools/lto/lto.cpp
View File

@ -237,5 +237,11 @@ lto_codegen_compile(lto_code_gen_t cg, size_t* length)
return cg->compile(length, sLastErrorString);
}
extern void
lto_codegen_debug_options(lto_code_gen_t cg, const char * opt)
{
cg->setCodeGenDebugOptions(opt);
}