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radeon/llvm: Optimize radeon_llvm_strip_unused_kernels()

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Just delete unused kernels rather than marking them as internal and
running the GlobalDCE pass.

Also implement this function in C and inline it into
radeon_llvm_get_kernel_module()
This commit is contained in:
Tom Stellard 2013-03-07 16:51:12 -05:00
parent 2ace79dce5
commit 3958c104c6
2 changed files with 10 additions and 17 deletions
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26
src/gallium/drivers/radeon/radeon_llvm_util.cpp
View file

@ -29,17 +29,6 @@ static LLVMModuleRef radeon_llvm_parse_bitcode(const unsigned char * bitcode,
return module;
}
extern "C" void radeon_llvm_strip_unused_kernels(LLVMModuleRef mod, const char *kernel_name)
{
llvm::Module *M = llvm::unwrap(mod);
std::vector<const char *> export_list;
export_list.push_back(kernel_name);
llvm::PassManager PM;
PM.add(llvm::createInternalizePass(export_list));
PM.add(llvm::createGlobalDCEPass());
PM.run(*M);
}
extern "C" unsigned radeon_llvm_get_num_kernels(const unsigned char *bitcode,
unsigned bitcode_len)
{
@ -53,16 +42,21 @@ extern "C" LLVMModuleRef radeon_llvm_get_kernel_module(unsigned index,
LLVMModuleRef mod;
unsigned num_kernels;
LLVMValueRef *kernel_metadata;
LLVMValueRef kernel_signature, kernel_function;
unsigned i;
mod = radeon_llvm_parse_bitcode(bitcode, bitcode_len);
num_kernels = LLVMGetNamedMetadataNumOperands(mod, "opencl.kernels");
kernel_metadata = (LLVMValueRef*)MALLOC(num_kernels * sizeof(LLVMValueRef));
LLVMGetNamedMetadataOperands(mod, "opencl.kernels", kernel_metadata);
kernel_signature = kernel_metadata[index];
LLVMGetMDNodeOperands(kernel_signature, &kernel_function);
const char* kernel_name = LLVMGetValueName(kernel_function);
radeon_llvm_strip_unused_kernels(mod, kernel_name);
for (i = 0; i < num_kernels; i++) {
LLVMValueRef kernel_signature, kernel_function;
if (i == index) {
continue;
}
kernel_signature = kernel_metadata[i];
LLVMGetMDNodeOperands(kernel_signature, &kernel_function);
LLVMDeleteFunction(kernel_function);
}
FREE(kernel_metadata);
return mod;
}

1
src/gallium/drivers/radeon/radeon_llvm_util.h
View file

@ -7,7 +7,6 @@
extern "C" {
#endif
void radeon_llvm_strip_unused_kernels(LLVMModuleRef mod, const char *kernel_name);
unsigned radeon_llvm_get_num_kernels(const unsigned char *bitcode, unsigned bitcode_len);
LLVMModuleRef radeon_llvm_get_kernel_module(unsigned index,
const unsigned char *bitcode, unsigned bitcode_len);