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Commitb96d550

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Support for optimizing and emitting code in LLVM JIT provider.
This commit introduces the ability to actually generate code usingLLVM. In particular, this adds:- Ability to emit code both in heavily optimized and largely unoptimized fashion- Batching facility to allow functions to be defined in small increments, but optimized and emitted in executable form in larger batches (for performance and memory efficiency)- Type and function declaration synchronization between runtime generated code and normal postgres code. This is critical to be able to access struct fields etc.- Developer oriented jit_dump_bitcode GUC, for inspecting / debugging the generated code.- per JitContext statistics of number of functions, time spent generating code, optimizing, and emitting it. This will later be employed for EXPLAIN support.This commit doesn't yet contain any code actually generatingfunctions. That'll follow in later commits.Documentation for GUCs added, and for JIT in general, will be added inlater commits.Author: Andres Freund, with contributions by Pierre DucroquetTesting-By: Thomas Munro, Peter EisentrautDiscussion:https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de
1 parent2fe6336 commitb96d550

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11 files changed

+748
-3
lines changed

11 files changed

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‎.gitignore

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# Global excludes across all subdirectories
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*.o
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*.obj
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*.bc
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*.so
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*.so.[0-9]
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*.so.[0-9].[0-9]

‎src/Makefile.global.in

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rm -f`find. -name'*.gcda' -print`
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endif# enable_coverage
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##########################################################################
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#
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# LLVM support
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#
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ifndefCOMPILE.c.bc
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# -Wno-ignored-attributes added so gnu_printf doesn't trigger
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# warnings, when the main binary is compiled with C.
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COMPILE.c.bc =$(CLANG) -Wno-ignored-attributes$(BITCODE_CFLAGS)$(CPPFLAGS) -flto=thin -emit-llvm -c
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endif
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ifndefCOMPILE.cxx.bc
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COMPILE.cxx.bc =$(CLANG) -xc++ -Wno-ignored-attributes$(BITCODE_CXXFLAGS)$(CPPFLAGS) -flto=thin -emit-llvm -c
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endif
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%.bc :%.c
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$(COMPILE.c.bc) -o$@$<
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%.bc :%.cpp
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$(COMPILE.cxx.bc) -o$@$<

‎src/backend/common.mk

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rm -f$(subsysfilename)$(OBJS)
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$(call recurse,coverage)
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$(call recurse,install)

‎src/backend/jit/jit.c

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/* GUCs */
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booljit_enabled= true;
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char*jit_provider="llvmjit";
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booljit_dump_bitcode= false;
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staticJitProviderCallbacksprovider;
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staticboolprovider_successfully_loaded= false;

‎src/backend/jit/llvm/Makefile

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# Code generation
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OBJS +=
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all: all-shared-lib
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all: all-shared-lib llvmjit_types.bc
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install: all installdirs install-lib
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install: all installdirs install-lib install-types
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installdirs: installdirs-lib
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uninstall: uninstall-lib
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uninstall: uninstall-lib uninstall-types
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# Note this is intentionally not in bitcodedir, as it's not for inlining */
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install-types: llvmjit_types.bc
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$(INSTALL_DATA) llvmjit_types.bc'$(DESTDIR)$(pkglibdir)'
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uninstall-types:
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rm -f'$(DESTDIR)$(pkglibdir)/llvmjit_types.bc'
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include$(top_srcdir)/src/Makefile.shlib
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cleandistcleanmaintainer-clean: clean-lib
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rm -f$(OBJS)
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rm -f llvmjit_types.bc

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