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gallivm: Setup a global optimization pass.

Browse source 
Modules are still free to setup their own optimization passes, but for the
normal case it should not be necessary.
This commit is contained in:
José Fonseca 2010-06-10 16:25:39 +01:00
parent 83ced5a918
commit e277d5c1f6
2 changed files with 31 additions and 0 deletions
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30
src/gallium/auxiliary/gallivm/lp_bld_init.c
View file

@ -32,6 +32,8 @@
#include "lp_bld_debug.h"
#include "lp_bld_init.h"
#include <llvm-c/Transforms/Scalar.h>
#ifdef DEBUG
unsigned gallivm_debug = 0;
@ -50,6 +52,7 @@ LLVMModuleRef lp_build_module = NULL;
LLVMExecutionEngineRef lp_build_engine = NULL;
LLVMModuleProviderRef lp_build_provider = NULL;
LLVMTargetDataRef lp_build_target = NULL;
LLVMPassManagerRef lp_build_pass = NULL;
/*
@ -127,6 +130,33 @@ lp_build_init(void)
if (!lp_build_target)
lp_build_target = LLVMGetExecutionEngineTargetData(lp_build_engine);
if (!lp_build_pass) {
lp_build_pass = LLVMCreateFunctionPassManager(lp_build_provider);
LLVMAddTargetData(lp_build_target, lp_build_pass);
if ((gallivm_debug & GALLIVM_DEBUG_NO_OPT) == 0) {
/* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
* but there are more on SVN. */
/* TODO: Add more passes */
LLVMAddCFGSimplificationPass(lp_build_pass);
LLVMAddPromoteMemoryToRegisterPass(lp_build_pass);
LLVMAddConstantPropagationPass(lp_build_pass);
if(util_cpu_caps.has_sse4_1) {
/* FIXME: There is a bug in this pass, whereby the combination of fptosi
* and sitofp (necessary for trunc/floor/ceil/round implementation)
* somehow becomes invalid code.
*/
LLVMAddInstructionCombiningPass(lp_build_pass);
}
LLVMAddGVNPass(lp_build_pass);
} else {
/* We need at least this pass to prevent the backends to fail in
* unexpected ways.
*/
LLVMAddPromoteMemoryToRegisterPass(lp_build_pass);
}
}
util_cpu_detect();
#if 0

1
src/gallium/auxiliary/gallivm/lp_bld_init.h
View file

@ -38,6 +38,7 @@ extern LLVMModuleRef lp_build_module;
extern LLVMExecutionEngineRef lp_build_engine;
extern LLVMModuleProviderRef lp_build_provider;
extern LLVMTargetDataRef lp_build_target;
extern LLVMPassManagerRef lp_build_pass;
void