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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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41
builtins.cpp
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@@ -336,9 +336,9 @@ lCheckModuleIntrinsics(llvm::Module *module) {
@param module Module to link the bitcode into
@param symbolTable Symbol table to add definitions to
*/
static void
lAddBitcode(const unsigned char *bitcode, int length,
llvm::Module *module, SymbolTable *symbolTable) {
void
AddBitcodeToModule(const unsigned char *bitcode, int length,
llvm::Module *module, SymbolTable *symbolTable) {
std::string bcErr;
llvm::StringRef sb = llvm::StringRef((char *)bitcode, length);
llvm::MemoryBuffer *bcBuf = llvm::MemoryBuffer::getMemBuffer(sb);
@@ -365,7 +365,8 @@ lAddBitcode(const unsigned char *bitcode, int length,
std::string(linkError);
if (llvm::Linker::LinkModules(module, bcModule, &linkError))
Error(SourcePos(), "Error linking stdlib bitcode: %s", linkError.c_str());
lAddModuleSymbols(module, symbolTable);
if (symbolTable != NULL)
lAddModuleSymbols(module, symbolTable);
lCheckModuleIntrinsics(module);
}
}
@@ -435,14 +436,14 @@ DefineStdlib(SymbolTable *symbolTable, llvm::LLVMContext *ctx, llvm::Module *mod
if (g->target.is32bit) {
extern unsigned char builtins_bitcode_c_32[];
extern int builtins_bitcode_c_32_length;
lAddBitcode(builtins_bitcode_c_32, builtins_bitcode_c_32_length,
module, symbolTable);
AddBitcodeToModule(builtins_bitcode_c_32, builtins_bitcode_c_32_length,
module, symbolTable);
}
else {
extern unsigned char builtins_bitcode_c_64[];
extern int builtins_bitcode_c_64_length;
lAddBitcode(builtins_bitcode_c_64, builtins_bitcode_c_64_length,
module, symbolTable);
AddBitcodeToModule(builtins_bitcode_c_64, builtins_bitcode_c_64_length,
module, symbolTable);
}
// Next, add the target's custom implementations of the various needed
@@ -451,22 +452,22 @@ DefineStdlib(SymbolTable *symbolTable, llvm::LLVMContext *ctx, llvm::Module *mod
case Target::SSE2:
extern unsigned char builtins_bitcode_sse2[];
extern int builtins_bitcode_sse2_length;
lAddBitcode(builtins_bitcode_sse2, builtins_bitcode_sse2_length, module,
symbolTable);
AddBitcodeToModule(builtins_bitcode_sse2, builtins_bitcode_sse2_length,
module, symbolTable);
break;
case Target::SSE4:
extern unsigned char builtins_bitcode_sse4[];
extern int builtins_bitcode_sse4_length;
extern unsigned char builtins_bitcode_sse4x2[];
extern int builtins_bitcode_sse4x2_length;
extern unsigned char builtins_bitcode_sse4_x2[];
extern int builtins_bitcode_sse4_x2_length;
switch (g->target.vectorWidth) {
case 4:
lAddBitcode(builtins_bitcode_sse4, builtins_bitcode_sse4_length,
module, symbolTable);
AddBitcodeToModule(builtins_bitcode_sse4, builtins_bitcode_sse4_length,
module, symbolTable);
break;
case 8:
lAddBitcode(builtins_bitcode_sse4x2, builtins_bitcode_sse4x2_length,
module, symbolTable);
AddBitcodeToModule(builtins_bitcode_sse4_x2, builtins_bitcode_sse4_x2_length,
module, symbolTable);
break;
default:
FATAL("logic error in DefineStdlib");
@@ -477,14 +478,14 @@ DefineStdlib(SymbolTable *symbolTable, llvm::LLVMContext *ctx, llvm::Module *mod
case 8:
extern unsigned char builtins_bitcode_avx[];
extern int builtins_bitcode_avx_length;
lAddBitcode(builtins_bitcode_avx, builtins_bitcode_avx_length, module,
symbolTable);
AddBitcodeToModule(builtins_bitcode_avx, builtins_bitcode_avx_length,
module, symbolTable);
break;
case 16:
extern unsigned char builtins_bitcode_avx_x2[];
extern int builtins_bitcode_avx_x2_length;
lAddBitcode(builtins_bitcode_avx_x2, builtins_bitcode_avx_x2_length,
module, symbolTable);
AddBitcodeToModule(builtins_bitcode_avx_x2, builtins_bitcode_avx_x2_length,
module, symbolTable);
break;
default:
FATAL("logic error in DefineStdlib");