975db80ef6
Pointers can be either uniform or varying, and behave correspondingly. e.g.: "uniform float * varying" is a varying pointer to uniform float data in memory, and "float * uniform" is a uniform pointer to varying data in memory. Like other types, pointers are varying by default. Pointer-based expressions, & and *, sizeof, ->, pointer arithmetic, and the array/pointer duality all bahave as in C. Array arguments to functions are converted to pointers, also like C. There is a built-in NULL for a null pointer value; conversion from compile-time constant 0 values to NULL still needs to be implemented. Other changes: - Syntax for references has been updated to be C++ style; a useful warning is now issued if the "reference" keyword is used. - It is now illegal to pass a varying lvalue as a reference parameter to a function; references are essentially uniform pointers. This case had previously been handled via special case call by value return code. That path has been removed, now that varying pointers are available to handle this use case (and much more). - Some stdlib routines have been updated to take pointers as arguments where appropriate (e.g. prefetch and the atomics). A number of others still need attention. - All of the examples have been updated - Many new tests TODO: documentation
346 lines
14 KiB
C++
346 lines
14 KiB
C++
/*
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Copyright (c) 2010-2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file main.cpp
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@brief main() entrypoint implementation for ispc
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*/
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#include "ispc.h"
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#include "module.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <llvm/Support/PrettyStackTrace.h>
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#include <llvm/Support/Signals.h>
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#if defined(LLVM_3_0) || defined(LLVM_3_0svn) || defined(LLVM_3_1svn)
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#include <llvm/Support/TargetRegistry.h>
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#include <llvm/Support/TargetSelect.h>
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#else
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#include <llvm/Target/TargetRegistry.h>
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#include <llvm/Target/TargetSelect.h>
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#include <llvm/Target/SubtargetFeature.h>
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#endif
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#ifdef ISPC_IS_WINDOWS
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#define strcasecmp stricmp
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#define BUILD_DATE __DATE__
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#define BUILD_VERSION ""
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#endif // ISPC_IS_WINDOWS
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static void usage(int ret) {
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printf("This is the Intel(r) SPMD Program Compiler (ispc), build %s (%s)\n\n",
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BUILD_DATE, BUILD_VERSION);
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printf("usage: ispc\n");
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printf(" [--arch={%s}]\t\tSelect target architecture\n",
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Target::SupportedTargetArchs());
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printf(" [--cpu=<cpu>]\t\t\tSelect target CPU type\n");
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printf(" <cpu>={%s}\n", Target::SupportedTargetCPUs());
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printf(" [-D<foo>]\t\t\t\t#define given value when running preprocessor\n");
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printf(" [--debug]\t\t\t\tPrint information useful for debugging ispc\n");
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printf(" [--emit-asm]\t\t\tGenerate assembly language file as output\n");
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printf(" [--emit-llvm]\t\t\tEmit LLVM bitode file as output\n");
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printf(" [--emit-obj]\t\t\tGenerate object file file as output (default)\n");
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printf(" [-g]\t\t\t\tGenerate debugging information\n");
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printf(" [--help]\t\t\t\tPrint help\n");
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printf(" [-h <name>/--header-outfile=<name>]\tOutput filename for header\n");
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printf(" [--instrument]\t\t\tEmit instrumentation to gather performance data\n");
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printf(" [--math-lib=<option>]\t\tSelect math library\n");
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printf(" default\t\t\t\tUse ispc's built-in math functions\n");
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printf(" fast\t\t\t\tUse high-performance but lower-accuracy math functions\n");
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printf(" svml\t\t\t\tUse the Intel(r) SVML math libraries\n");
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printf(" system\t\t\t\tUse the system's math library (*may be quite slow*)\n");
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printf(" [--nostdlib]\t\t\tDon't make the ispc standard library available\n");
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printf(" [--nocpp]\t\t\t\tDon't run the C preprocessor\n");
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printf(" [-o <name>/--outfile=<name>]\tOutput filename (may be \"-\" for standard output)\n");
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printf(" [-O0/-O1]\t\t\t\tSet optimization level (-O1 is default)\n");
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printf(" [--opt=<option>]\t\t\tSet optimization option\n");
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printf(" 32-bit-addressing\t\tUse 32-bit math for addressing calculations even on 64-bit targets.\n");
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printf(" disable-assertions\t\tRemove assertion statements from final code.\n");
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printf(" disable-loop-unroll\t\tDisable loop unrolling.\n");
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printf(" fast-masked-vload\t\tFaster masked vector loads on SSE (may go past end of array)\n");
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printf(" fast-math\t\t\tPerform non-IEEE-compliant optimizations of numeric expressions\n");
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#if 0
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printf(" disable-handle-pseudo-memory-ops\n");
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printf(" disable-blended-masked-stores\t\tScalarize masked stores on SSE (vs. using vblendps)\n");
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printf(" disable-coherent-control-flow\t\tDisable coherent control flow optimizations\n");
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printf(" disable-uniform-control-flow\t\tDisable uniform control flow optimizations\n");
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printf(" disable-gather-scatter-optimizations\tDisable improvements to gather/scatter\n");
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printf(" disable-blending-removal\t\tDisable eliminating blend at same scope\n");
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printf(" disable-gather-scatter-flattening\tDisable flattening when all lanes are on\n");
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printf(" disable-uniform-memory-optimizations\tDisable uniform-based coherent memory access\n");
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printf(" disable-masked-store-optimizations\tDisable lowering to regular stores when possible\n");
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#endif
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#ifndef ISPC_IS_WINDOWS
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printf(" [--pic]\t\t\t\tGenerate position-independent code\n");
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#endif // !ISPC_IS_WINDOWS
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printf(" [--target=<isa>]\t\t\tSelect target ISA. <isa>={%s}\n", Target::SupportedTargetISAs());
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printf(" [--version]\t\t\t\tPrint ispc version\n");
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printf(" [--woff]\t\t\t\tDisable warnings\n");
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printf(" [--wno-perf]\t\t\tDon't issue warnings related to performance-related issues\n");
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printf(" <file to compile or \"-\" for stdin>\n");
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exit(ret);
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}
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/** We take arguments from both the command line as well as from the
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ISPC_ARGS environment variable. This function returns a new set of
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arguments representing the ones from those two sources merged together.
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*/
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static void lGetAllArgs(int Argc, char *Argv[], int &argc, char *argv[128]) {
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// Copy over the command line arguments (passed in)
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for (int i = 0; i < Argc; ++i)
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argv[i] = Argv[i];
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argc = Argc;
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// See if we have any set via the environment variable
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const char *env = getenv("ISPC_ARGS");
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if (!env)
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return;
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while (true) {
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// Look for the next space in the string, which delimits the end of
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// the current argument
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const char *end = strchr(env, ' ');
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if (end == NULL)
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end = env + strlen(env);
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int len = end - env;
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// Copy the argument into a newly allocated memory (so we can
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// NUL-terminate it).
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char *ptr = new char[len+1];
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strncpy(ptr, env, len);
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ptr[len] = '\0';
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// Add it to the args array and get out of here
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argv[argc++] = ptr;
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if (*end == '\0')
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break;
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// Advance the starting pointer of the string to the next non-space
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// character
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env = end+1;
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while (*env == ' ')
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++env;
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// Hit the end of the string; get out of here
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if (*env == '\0')
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break;
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}
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}
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int main(int Argc, char *Argv[]) {
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int argc;
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char *argv[128];
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lGetAllArgs(Argc, Argv, argc, argv);
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// Use LLVM's little utility function to print out nice stack traces if
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// we crash
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llvm::sys::PrintStackTraceOnErrorSignal();
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llvm::PrettyStackTraceProgram X(argc, argv);
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// initialize available LLVM targets
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LLVMInitializeX86TargetInfo();
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LLVMInitializeX86Target();
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LLVMInitializeX86AsmPrinter();
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LLVMInitializeX86AsmParser();
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LLVMInitializeX86Disassembler();
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#if defined(LLVM_3_0) || defined(LLVM_3_0svn) || defined(LLVM_3_1svn)
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LLVMInitializeX86TargetMC();
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#endif
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char *file = NULL;
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const char *headerFileName = NULL;
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const char *outFileName = NULL;
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// Initiailize globals early so that we can set various option values
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// as we're parsing below
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g = new Globals;
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bool debugSet = false, optSet = false;
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Module::OutputType ot = Module::Object;
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bool generatePIC = false;
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const char *arch = NULL, *cpu = NULL, *target = NULL;
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for (int i = 1; i < argc; ++i) {
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if (!strcmp(argv[i], "--help"))
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usage(0);
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else if (!strncmp(argv[i], "-D", 2))
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g->cppArgs.push_back(argv[i]);
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else if (!strncmp(argv[i], "--arch=", 7))
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arch = argv[i] + 7;
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else if (!strncmp(argv[i], "--cpu=", 6))
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cpu = argv[i] + 6;
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else if (!strcmp(argv[i], "--fast-math")) {
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fprintf(stderr, "--fast-math option has been renamed to --opt=fast-math!\n");
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usage(1);
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}
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else if (!strcmp(argv[i], "--fast-masked-vload")) {
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fprintf(stderr, "--fast-masked-vload option has been renamed to "
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"--opt=fast-masked-vload!\n");
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usage(1);
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}
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else if (!strcmp(argv[i], "--debug"))
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g->debugPrint = true;
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else if (!strcmp(argv[i], "--instrument"))
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g->emitInstrumentation = true;
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else if (!strcmp(argv[i], "-g")) {
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g->generateDebuggingSymbols = true;
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debugSet = true;
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}
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else if (!strcmp(argv[i], "--emit-asm"))
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ot = Module::Asm;
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else if (!strcmp(argv[i], "--emit-llvm"))
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ot = Module::Bitcode;
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else if (!strcmp(argv[i], "--emit-obj"))
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ot = Module::Object;
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else if (!strcmp(argv[i], "--target")) {
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// FIXME: should remove this way of specifying the target...
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if (++i == argc) usage(1);
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target = argv[i];
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}
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else if (!strncmp(argv[i], "--target=", 9))
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target = argv[i] + 9;
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else if (!strncmp(argv[i], "--math-lib=", 11)) {
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const char *lib = argv[i] + 11;
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if (!strcmp(lib, "default"))
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g->mathLib = Globals::Math_ISPC;
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else if (!strcmp(lib, "fast"))
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g->mathLib = Globals::Math_ISPCFast;
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else if (!strcmp(lib, "svml"))
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g->mathLib = Globals::Math_SVML;
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else if (!strcmp(lib, "system"))
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g->mathLib = Globals::Math_System;
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else
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usage(1);
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}
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else if (!strncmp(argv[i], "--opt=", 6)) {
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const char *opt = argv[i] + 6;
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if (!strcmp(opt, "fast-math"))
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g->opt.fastMath = true;
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else if (!strcmp(opt, "fast-masked-vload"))
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g->opt.fastMaskedVload = true;
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else if (!strcmp(opt, "32-bit-addressing"))
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g->opt.force32BitAddressing = true;
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else if (!strcmp(opt, "disable-assertions"))
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g->opt.disableAsserts = true;
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else if (!strcmp(opt, "disable-loop-unroll"))
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g->opt.unrollLoops = false;
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// These are only used for performance tests of specific
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// optimizations
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else if (!strcmp(opt, "disable-handle-pseudo-memory-ops"))
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g->opt.disableHandlePseudoMemoryOps = true;
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else if (!strcmp(opt, "disable-blended-masked-stores"))
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g->opt.disableBlendedMaskedStores = true;
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else if (!strcmp(opt, "disable-coherent-control-flow"))
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g->opt.disableCoherentControlFlow = true;
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else if (!strcmp(opt, "disable-uniform-control-flow"))
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g->opt.disableUniformControlFlow = true;
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else if (!strcmp(opt, "disable-gather-scatter-optimizations"))
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g->opt.disableGatherScatterOptimizations = true;
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else if (!strcmp(opt, "disable-blending-removal"))
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g->opt.disableMaskedStoreToStore = true;
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else if (!strcmp(opt, "disable-gather-scatter-flattening"))
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g->opt.disableGatherScatterFlattening = true;
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else if (!strcmp(opt, "disable-uniform-memory-optimizations"))
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g->opt.disableUniformMemoryOptimizations = true;
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else if (!strcmp(opt, "disable-masked-store-optimizations"))
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g->opt.disableMaskedStoreOptimizations = true;
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else
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usage(1);
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}
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else if (!strcmp(argv[i], "--woff") || !strcmp(argv[i], "-woff")) {
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g->disableWarnings = true;
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g->emitPerfWarnings = false;
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}
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else if (!strcmp(argv[i], "--nowrap"))
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g->disableLineWrap = true;
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else if (!strcmp(argv[i], "--wno-perf") || !strcmp(argv[i], "-wno-perf"))
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g->emitPerfWarnings = false;
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else if (!strcmp(argv[i], "-o")) {
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if (++i == argc) usage(1);
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outFileName = argv[i];
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}
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else if (!strcmp(argv[i], "--outfile="))
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outFileName = argv[i] + strlen("--outfile=");
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else if (!strcmp(argv[i], "-h")) {
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if (++i == argc) usage(1);
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headerFileName = argv[i];
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}
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else if (!strcmp(argv[i], "--header-outfile=")) {
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headerFileName = argv[i] + strlen("--header-outfile=");
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}
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else if (!strcmp(argv[i], "-O0")) {
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g->opt.level = 0;
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optSet = true;
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}
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else if (!strcmp(argv[i], "-O") || !strcmp(argv[i], "-O1") ||
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!strcmp(argv[i], "-O2") || !strcmp(argv[i], "-O3")) {
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g->opt.level = 1;
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optSet = true;
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}
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else if (!strcmp(argv[i], "-"))
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;
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else if (!strcmp(argv[i], "--nostdlib"))
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g->includeStdlib = false;
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else if (!strcmp(argv[i], "--nocpp"))
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g->runCPP = false;
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#ifndef ISPC_IS_WINDOWS
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else if (!strcmp(argv[i], "--pic"))
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generatePIC = true;
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#endif // !ISPC_IS_WINDOWS
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else if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--version")) {
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printf("Intel(r) SPMD Program Compiler (ispc) build %s (%s)\n",
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BUILD_DATE, BUILD_VERSION);
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return 0;
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}
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else if (argv[i][0] == '-')
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usage(1);
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else {
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if (file != NULL)
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usage(1);
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else
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file = argv[i];
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}
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}
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// If the user specified -g, then the default optimization level is 0.
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// If -g wasn't specified, the default optimization level is 1 (full
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// optimization).
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if (debugSet && !optSet)
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g->opt.level = 0;
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return Module::CompileAndOutput(file, arch, cpu, target, generatePIC,
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ot, outFileName, headerFileName);
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}
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