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[llvm-exegesis] Initialize all supported targets

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Enable registration of multiple exegesis targets at once. Use idiomatic approach to defining target select macros, but leave code in the llvm-mca sub-directories for now.

This is a stepping stone towards allowing llvm-exegesis benchmarking via simulator or testing in non-target dependent tests.

Differential Revision: https://reviews.llvm.org/D133605
This commit is contained in:
Philip Reames
2022-09-22 09:02:22 -07:00
committed by Philip Reames
parent 32dc1151e2
commit 47afaf2eb0
5 changed files with 56 additions and 27 deletions
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11
llvm/CMakeLists.txt
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@@ -878,6 +878,7 @@ set(LLVM_ENUM_ASM_PRINTERS "")
set(LLVM_ENUM_ASM_PARSERS "")
set(LLVM_ENUM_DISASSEMBLERS "")
set(LLVM_ENUM_TARGETMCAS "")
set(LLVM_ENUM_EXEGESIS "")
foreach(t ${LLVM_TARGETS_TO_BUILD})
set( td ${LLVM_MAIN_SRC_DIR}/lib/Target/${t} )
@@ -907,10 +908,14 @@ foreach(t ${LLVM_TARGETS_TO_BUILD})
set(LLVM_ENUM_DISASSEMBLERS
"${LLVM_ENUM_DISASSEMBLERS}LLVM_DISASSEMBLER(${t})\n")
endif()
if( EXISTS ${td}/MCA/CMakeLists.txt )
if( EXISTS ${td}/MCA/CMakeLists.txt )
set(LLVM_ENUM_TARGETMCAS
"${LLVM_ENUM_TARGETMCAS}LLVM_TARGETMCA(${t})\n")
endif()
if( EXISTS ${LLVM_MAIN_SRC_DIR}/tools/llvm-exegesis/lib/${t}/CMakeLists.txt )
set(LLVM_ENUM_EXEGESIS
"${LLVM_ENUM_EXEGESIS}LLVM_EXEGESIS(${t})\n")
endif()
endforeach(t)
# Provide an LLVM_ namespaced alias for use in #cmakedefine.
@@ -938,6 +943,10 @@ configure_file(
${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/TargetMCAs.def.in
${LLVM_INCLUDE_DIR}/llvm/Config/TargetMCAs.def
)
configure_file(
${LLVM_MAIN_INCLUDE_DIR}/llvm/Config/TargetExegesis.def.in
${LLVM_INCLUDE_DIR}/llvm/Config/TargetExegesis.def
)
# They are not referenced. See set_output_directory().
set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LLVM_TOOLS_BINARY_DIR} )

29
llvm/include/llvm/Config/TargetExegesis.def.in Normal file
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@@ -0,0 +1,29 @@
/*===----- llvm/Config/TargetExegesis.def - LLVM Target Exegesis-*- C++ -*-===*\
|* *|
|* Part of the LLVM Project, under the Apache License v2.0 with LLVM *|
|* Exceptions. *|
|* See https://llvm.org/LICENSE.txt for license information. *|
|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception *|
|* *|
|*===----------------------------------------------------------------------===*|
|* *|
|* This file enumerates all of the target's of llvm-exegesis *|
|* supported by this build of LLVM. Clients of this file should define *|
|* the LLVM_EXEGISIS macro to be a function-like macro with a *|
|* single parameter (the name of the target whose assembly can be *|
|* generated); including this file will then enumerate all of the *|
|* targets with target llvm-exegsis support. *|
|* *|
|* The set of targets supported by LLVM is generated at configuration *|
|* time, at which point this header is generated. Do not modify this *|
|* header directly. *|
|* *|
\*===----------------------------------------------------------------------===*/
#ifndef LLVM_EXEGESIS
# error Please define the macro LLVM_EXEGESIS(TargetName)
#endif
@LLVM_ENUM_EXEGESIS@
#undef LLVM_EXEGESIS

8
llvm/tools/llvm-exegesis/CMakeLists.txt
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@@ -20,13 +20,7 @@ add_llvm_tool(llvm-exegesis
# Has side effect of defining LLVM_EXEGESIS_TARGETS
add_subdirectory(lib)
# Register the native target (we don't yet support -march)
if (LLVM_EXEGESIS_TARGETS MATCHES "${LLVM_NATIVE_ARCH}")
set(LLVM_EXEGESIS_NATIVE_ARCH "${LLVM_NATIVE_ARCH}")
set_source_files_properties(llvm-exegesis.cpp PROPERTIES COMPILE_FLAGS "-DLLVM_EXEGESIS_INITIALIZE_NATIVE_TARGET=Initialize${LLVM_EXEGESIS_NATIVE_ARCH}ExegesisTarget")
endif()
# Link the native exegesis targets
# Link all enabled exegesis targets
set(libs)
foreach(t ${LLVM_EXEGESIS_TARGETS})
string(STRIP ${t} t)

24
llvm/tools/llvm-exegesis/lib/TargetSelect.h
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@@ -8,30 +8,26 @@
///
/// \file
///
/// Utilities to handle the creation of the native exegesis target.
/// Utilities to handle the creation of the enabled exegesis target(s).
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_TARGET_SELECT_H
#define LLVM_TOOLS_LLVM_EXEGESIS_TARGET_SELECT_H
#include "llvm/Config/llvm-config.h"
namespace llvm {
namespace exegesis {
#ifdef LLVM_EXEGESIS_INITIALIZE_NATIVE_TARGET
void LLVM_EXEGESIS_INITIALIZE_NATIVE_TARGET();
#endif
// Forward declare all of the initialize methods for targets compiled in
#define LLVM_EXEGESIS(TargetName) void Initialize##TargetName##ExegesisTarget();
#include "llvm/Config/TargetExegesis.def"
// Initializes the native exegesis target, or returns false if there is no
// native target (either because llvm-exegesis does not support the target or
// because it's not linked in).
inline bool InitializeNativeExegesisTarget() {
#ifdef LLVM_EXEGESIS_INITIALIZE_NATIVE_TARGET
LLVM_EXEGESIS_INITIALIZE_NATIVE_TARGET();
return true;
#else
return false;
#endif
// Initializes all exegesis targets compiled in.
inline void InitializeAllExegesisTargets() {
#define LLVM_EXEGESIS(TargetName) Initialize##TargetName##ExegesisTarget();
#include "llvm/Config/TargetExegesis.def"
}
} // namespace exegesis

11
llvm/tools/llvm-exegesis/llvm-exegesis.cpp
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@@ -302,7 +302,7 @@ void benchmarkMain() {
InitializeAllTargetMCs();
InitializeAllAsmPrinters();
InitializeAllAsmParsers();
InitializeNativeExegesisTarget();
InitializeAllExegesisTargets();
const LLVMState State = ExitOnErr(LLVMState::Create("", CpuName));
@@ -411,10 +411,11 @@ static void analysisMain() {
"and --analysis-inconsistencies-output-file must be specified");
}
InitializeNativeTarget();
InitializeNativeTargetAsmPrinter();
InitializeNativeTargetDisassembler();
InitializeNativeExegesisTarget();
InitializeAllTargets();
InitializeAllTargetMCs();
InitializeAllAsmPrinters();
InitializeAllDisassemblers();
InitializeAllExegesisTargets();
auto MemoryBuffer = ExitOnFileError(
BenchmarkFile,