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/*
* Copyright 2012, 2013 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors: Tom Stellard <thomas.stellard@amd.com>
*
*/
#include "radeon_llvm_util.h"
#include "util/u_memory.h"
#include <llvm-c/BitReader.h>
#include <llvm-c/Core.h>
#include <llvm-c/Target.h>
#include <llvm-c/Transforms/IPO.h>
#include <llvm-c/Transforms/PassManagerBuilder.h>
LLVMModuleRef radeon_llvm_parse_bitcode(LLVMContextRef ctx,
const unsigned char * bitcode, unsigned bitcode_len)
{
LLVMMemoryBufferRef buf;
LLVMModuleRef module;
buf = LLVMCreateMemoryBufferWithMemoryRangeCopy((const char*)bitcode,
bitcode_len, "radeon");
LLVMParseBitcodeInContext(ctx, buf, &module, NULL);
LLVMDisposeMemoryBuffer(buf);
return module;
}
unsigned radeon_llvm_get_num_kernels(LLVMContextRef ctx,
const unsigned char *bitcode, unsigned bitcode_len)
{
LLVMModuleRef mod = radeon_llvm_parse_bitcode(ctx, bitcode, bitcode_len);
return LLVMGetNamedMetadataNumOperands(mod, "opencl.kernels");
}
static void radeon_llvm_optimize(LLVMModuleRef mod)
{
const char *data_layout = LLVMGetDataLayout(mod);
LLVMTargetDataRef TD = LLVMCreateTargetData(data_layout);
LLVMPassManagerBuilderRef builder = LLVMPassManagerBuilderCreate();
LLVMPassManagerRef pass_manager = LLVMCreatePassManager();
/* Functions calls are not supported yet, so we need to inline
* everything. The most efficient way to do this is to add
* the always_inline attribute to all non-kernel functions
* and then run the Always Inline pass. The Always Inline
* pass will automaically inline functions with this attribute
* and does not perform the expensive cost analysis that the normal
* inliner does.
*/
LLVMValueRef fn;
for (fn = LLVMGetFirstFunction(mod); fn; fn = LLVMGetNextFunction(fn)) {
/* All the non-kernel functions have internal linkage */
if (LLVMGetLinkage(fn) == LLVMInternalLinkage) {
LLVMAddFunctionAttr(fn, LLVMAlwaysInlineAttribute);
}
}
LLVMAddTargetData(TD, pass_manager);
LLVMAddAlwaysInlinerPass(pass_manager);
LLVMPassManagerBuilderPopulateModulePassManager(builder, pass_manager);
LLVMRunPassManager(pass_manager, mod);
LLVMPassManagerBuilderDispose(builder);
LLVMDisposePassManager(pass_manager);
LLVMDisposeTargetData(TD);
}
LLVMModuleRef radeon_llvm_get_kernel_module(LLVMContextRef ctx, unsigned index,
const unsigned char *bitcode, unsigned bitcode_len)
{
LLVMModuleRef mod;
unsigned num_kernels;
LLVMValueRef *kernel_metadata;
unsigned i;
mod = radeon_llvm_parse_bitcode(ctx, bitcode, bitcode_len);
num_kernels = LLVMGetNamedMetadataNumOperands(mod, "opencl.kernels");
kernel_metadata = MALLOC(num_kernels * sizeof(LLVMValueRef));
LLVMGetNamedMetadataOperands(mod, "opencl.kernels", kernel_metadata);
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);
radeon_llvm_optimize(mod);
return mod;
}
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