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Add support for compiling to multiple targets.

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If a flag along the lines of "--target=sse4,avx-x2" is provided on the command-line,
then the program will be compiled for each of the given targets, with a separate
output file generated for each one.  Further, an output file with dispatch functions
that check the current system's CPU and then chooses the best available variant
is also created.

Issue #11.
This commit is contained in:
Matt Pharr
2011-10-04 15:48:37 -07:00
parent 880cbb18cc
commit 06975bc7ab
12 changed files with 798 additions and 118 deletions
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47
module.h
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@@ -75,11 +75,37 @@ public:
variables, and the types used by them. */
};
/** Write the corresponding output type to the given file. Returns
true on success, false if there has been an error. The given
filename may be NULL, indicating that output should go to standard
output. */
bool WriteOutput(OutputType ot, const char *filename);
/** Compile the given source file, generating assembly, object file, or
LLVM bitcode output, as well as (optionally) a header file with
declarations of functions and types used in the ispc/application
interface.
@param srcFile Pathname to ispc source file to compile
@param arch Target architecture (e.g. "x86-64")
@param cpu Target CPU (e.g. "core-i7")
@param targets Target ISAs; this parameter may give a single target
ISA, or may give a comma-separated list of them in
case we are compiling to multiple ISAs.
@param generatePIC Indicates whether position-independent code should
be generated.
@param outputType Type of output to generate (object files, assembly,
LLVM bitcode.)
@param outFileName Base name of output filename for object files, etc.
If for example the multiple targets "sse2" and "avx"
are specified in the "targets" parameter and if this
parameter is "foo.o", then we'll generate multiple
output files, like "foo.o", "foo_sse2.o", "foo_avx.o".
@param headerFileName If non-NULL, emit a header file suitable for
inclusion from C/C++ code with declarations of
types and functions exported from the given ispc
source file.
@return Number of errors encountered when compiling
srcFile.
*/
static int CompileAndOutput(const char *srcFile, const char *arch,
const char *cpu, const char *targets,
bool generatePIC, OutputType outputType,
const char *outFileName,
const char *headerFileName);
/** Total number of errors encountered during compilation. */
int errorCount;
@@ -99,10 +125,19 @@ public:
private:
const char *filename;
/** Write the corresponding output type to the given file. Returns
true on success, false if there has been an error. The given
filename may be NULL, indicating that output should go to standard
output. */
bool writeOutput(OutputType ot, const char *filename);
bool writeHeader(const char *filename);
bool writeObjectFileOrAssembly(OutputType outputType, const char *filename);
void execPreprocessor(const char *infilename, llvm::raw_string_ostream* ostream) const;
static bool writeObjectFileOrAssembly(llvm::TargetMachine *targetMachine,
llvm::Module *module, OutputType outputType,
const char *outFileName);
static bool writeBitcode(llvm::Module *module, const char *outFileName);
void execPreprocessor(const char *infilename, llvm::raw_string_ostream* ostream) const;
};
#endif // ISPC_MODULE_H