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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* All Rights Reserved.
*
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
#include "util/u_debug.h"
#include "util/os_time.h"
#include "lp_bld_debug.h"
#include "lp_bld_passmgr.h"
#define USE_NEW_PASS (LLVM_VERSION_MAJOR >= 15)
#if USE_NEW_PASS == 1
#include <llvm-c/Transforms/PassBuilder.h>
#else
#include <llvm-c/Transforms/Scalar.h>
#include <llvm-c/Transforms/Utils.h>
#if LLVM_VERSION_MAJOR <= 8 && (DETECT_ARCH_AARCH64 || DETECT_ARCH_ARM || DETECT_ARCH_S390 || DETECT_ARCH_MIPS64)
#include <llvm-c/Transforms/IPO.h>
#endif
#include <llvm-c/Transforms/Coroutines.h>
#endif
#if USE_NEW_PASS == 0
struct lp_passmgr {
LLVMPassManagerRef passmgr;
LLVMPassManagerRef cgpassmgr;
};
#else
struct lp_passmgr;
#endif
bool
lp_passmgr_create(LLVMModuleRef module, struct lp_passmgr **mgr_p)
{
struct lp_passmgr *mgr = NULL;
#if USE_NEW_PASS == 0
mgr = CALLOC_STRUCT(lp_passmgr);
if (!mgr)
return false;
mgr->passmgr = LLVMCreateFunctionPassManagerForModule(module);
if (!mgr->passmgr) {
free(mgr);
return false;
}
mgr->cgpassmgr = LLVMCreatePassManager();
/*
* TODO: some per module pass manager with IPO passes might be helpful -
* the generated texture functions may benefit from inlining if they are
* simple, or constant propagation into them, etc.
*/
#if LLVM_VERSION_MAJOR <= 8 && (DETECT_ARCH_AARCH64 || DETECT_ARCH_ARM || DETECT_ARCH_S390 || DETECT_ARCH_MIPS64)
LLVMAddArgumentPromotionPass(mgr->cgpassmgr);
LLVMAddFunctionAttrsPass(mgr->cgpassmgr);
#endif
LLVMAddCoroEarlyPass(mgr->cgpassmgr);
LLVMAddCoroSplitPass(mgr->cgpassmgr);
LLVMAddCoroElidePass(mgr->cgpassmgr);
if ((gallivm_perf & GALLIVM_PERF_NO_OPT) == 0) {
/*
* TODO: Evaluate passes some more - keeping in mind
* both quality of generated code and compile times.
*/
/*
* NOTE: if you change this, don't forget to change the output
* with GALLIVM_DEBUG_DUMP_BC in gallivm_compile_module.
*/
LLVMAddScalarReplAggregatesPass(mgr->passmgr);
LLVMAddEarlyCSEPass(mgr->passmgr);
LLVMAddCFGSimplificationPass(mgr->passmgr);
/*
* FIXME: LICM is potentially quite useful. However, for some
* rather crazy shaders the compile time can reach _hours_ per shader,
* due to licm implying lcssa (since llvm 3.5), which can take forever.
* Even for sane shaders, the cost of licm is rather high (and not just
* due to lcssa, licm itself too), though mostly only in cases when it
* can actually move things, so having to disable it is a pity.
* LLVMAddLICMPass(mgr->passmgr);
*/
LLVMAddReassociatePass(mgr->passmgr);
LLVMAddPromoteMemoryToRegisterPass(mgr->passmgr);
#if LLVM_VERSION_MAJOR <= 11
LLVMAddConstantPropagationPass(mgr->passmgr);
#else
LLVMAddInstructionSimplifyPass(mgr->passmgr);
#endif
LLVMAddInstructionCombiningPass(mgr->passmgr);
LLVMAddGVNPass(mgr->passmgr);
}
else {
/* We need at least this pass to prevent the backends to fail in
* unexpected ways.
*/
LLVMAddPromoteMemoryToRegisterPass(mgr->passmgr);
}
LLVMAddCoroCleanupPass(mgr->passmgr);
#endif
*mgr_p = mgr;
return true;
}
void
lp_passmgr_run(struct lp_passmgr *mgr,
LLVMModuleRef module,
LLVMTargetMachineRef tm,
const char *module_name)
{
int64_t time_begin;
if (gallivm_debug & GALLIVM_DEBUG_PERF)
time_begin = os_time_get();
#if USE_NEW_PASS == 1
char passes[1024];
passes[0] = 0;
/*
* there should be some way to combine these two pass runs but I'm not seeing it,
* at the time of writing.
*/
strcpy(passes, "default<O0>");
LLVMPassBuilderOptionsRef opts = LLVMCreatePassBuilderOptions();
LLVMRunPasses(module, passes, tm, opts);
if (!(gallivm_perf & GALLIVM_PERF_NO_OPT))
#if LLVM_VERSION_MAJOR >= 18
strcpy(passes, "sroa,early-cse,simplifycfg,reassociate,mem2reg,instsimplify,instcombine<no-verify-fixpoint>");
#else
strcpy(passes, "sroa,early-cse,simplifycfg,reassociate,mem2reg,instsimplify,instcombine");
#endif
else
strcpy(passes, "mem2reg");
LLVMRunPasses(module, passes, tm, opts);
LLVMDisposePassBuilderOptions(opts);
#else
LLVMRunPassManager(mgr->cgpassmgr, module);
/* Run optimization passes */
LLVMInitializeFunctionPassManager(mgr->passmgr);
LLVMValueRef func;
func = LLVMGetFirstFunction(module);
while (func) {
if (0) {
debug_printf("optimizing func %s...\n", LLVMGetValueName(func));
}
/* Disable frame pointer omission on debug/profile builds */
/* XXX: And workaround http://llvm.org/PR21435 */
#if MESA_DEBUG || defined(PROFILE) || DETECT_ARCH_X86 || DETECT_ARCH_X86_64
LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim", "true");
LLVMAddTargetDependentFunctionAttr(func, "no-frame-pointer-elim-non-leaf", "true");
#endif
LLVMRunFunctionPassManager(mgr->passmgr, func);
func = LLVMGetNextFunction(func);
}
LLVMFinalizeFunctionPassManager(mgr->passmgr);
#endif
if (gallivm_debug & GALLIVM_DEBUG_PERF) {
int64_t time_end = os_time_get();
int time_msec = (int)((time_end - time_begin) / 1000);
assert(module_name);
debug_printf("optimizing module %s took %d msec\n",
module_name, time_msec);
}
}
void
lp_passmgr_dispose(struct lp_passmgr *mgr)
{
#if USE_NEW_PASS == 0
if (mgr->passmgr) {
LLVMDisposePassManager(mgr->passmgr);
mgr->passmgr = NULL;
}
if (mgr->cgpassmgr) {
LLVMDisposePassManager(mgr->cgpassmgr);
mgr->cgpassmgr = NULL;
}
FREE(mgr);
#endif
}
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