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Unroll loops by 8 and enable some additional passes

This commit is contained in:
Magnus Norddahl 2016-10-08 06:50:33 +02:00
parent 606b7f5a00
commit b3be0d22cc
3 changed files with 19 additions and 3 deletions
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3
src/r_compiler/llvmdrawers.cpp
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@ -434,6 +434,9 @@ LLVMProgram::LLVMProgram()
passManagerBuilder.OptLevel = 3;
passManagerBuilder.SizeLevel = 0;
passManagerBuilder.Inliner = createFunctionInliningPass();
passManagerBuilder.SLPVectorize = true;
passManagerBuilder.LoopVectorize = true;
passManagerBuilder.LoadCombine = true;
passManagerBuilder.populateModulePassManager(*mModulePassManager.get());
passManagerBuilder.populateFunctionPassManager(*mFunctionPassManager.get());
}

17
src/r_compiler/ssa/ssa_for_block.cpp
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@ -13,9 +13,22 @@ SSAForBlock::SSAForBlock()
SSAScope::builder().SetInsertPoint(if_basic_block);
}
void SSAForBlock::loop_block(SSABool true_condition)
void SSAForBlock::loop_block(SSABool true_condition, int unroll_count)
{
SSAScope::builder().CreateCondBr(true_condition.v, loop_basic_block, end_basic_block);
auto branch = SSAScope::builder().CreateCondBr(true_condition.v, loop_basic_block, end_basic_block);
if (unroll_count > 0)
{
using namespace llvm;
auto md_unroll_enable = MDNode::get(SSAScope::context(), {
MDString::get(SSAScope::context(), "llvm.loop.unroll.enable")
});
auto md_unroll_count = MDNode::get(SSAScope::context(), {
MDString::get(SSAScope::context(), "llvm.loop.unroll.count"),
ConstantAsMetadata::get(ConstantInt::get(SSAScope::context(), APInt(32, unroll_count)))
});
auto md_loop = MDNode::getDistinct(SSAScope::context(), { md_unroll_enable, md_unroll_count });
branch->setMetadata(LLVMContext::MD_loop, md_loop);
}
SSAScope::builder().SetInsertPoint(loop_basic_block);
}

2
src/r_compiler/ssa/ssa_for_block.h
View File

@ -7,7 +7,7 @@ class SSAForBlock
{
public:
SSAForBlock();
void loop_block(SSABool true_condition);
void loop_block(SSABool true_condition, int unroll_count = 8);
void end_block();
private: