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Add option for link-time optimization/link-time code generation

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The option is disabled by default.

configure.ac:
    Add --enable-lto option to the configure script to enable LTO/LTCG.

scripts/mgnuc.in:
scripts/ml.in:
    Pass LTO options to the C compiler/linker.

compiler/compile_target_code.m:
compiler/options.m:
scripts/Mercury.config.in:
    Add internal options to specify C compiler and linker LTO/LTCG flags.
This commit is contained in:
AlaskanEmily
2019-11-09 17:23:36 -08:00
committed by Julien Fischer
parent 9a042f4fb1
commit 416fbe954a
6 changed files with 57 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
scripts/Mercury.config.in
View File

@@ -72,6 +72,7 @@ DEFAULT_MCFLAGS=\
--cflags-for-regs "@CFLAGS_FOR_REGS@" \
--cflags-for-gotos "@CFLAGS_FOR_GOTOS@" \
--cflags-for-pic "@CFLAGS_FOR_PIC@" \
--cflags-for-lto "@CFLAGS_FOR_LTO@" \
--c-flag-to-name-object-file "@OBJFILE_OPT@" \
--java-flags "@JAVAC_FLAGS_FOR_HEAP_SIZE_CONFIG@" \
--object-file-extension ".@OBJ_SUFFIX@" \
@@ -98,6 +99,7 @@ DEFAULT_MCFLAGS=\
--readline-libs "@READLINE_LIBRARIES@" \
--linker-opt-separator "@LINK_OPT_SEP@" \
--linker-thread-flags "@LDFLAGS_FOR_THREADS@" \
--linker-lto-flags "@LDFLAGS_FOR_LTO@" \
--shlib-linker-thread-flags "@LD_LIBFLAGS_FOR_THREADS@" \
--linker-trace-flags "@LDFLAGS_FOR_TRACE@" \
--shlib-linker-trace-flags "@LD_LIBFLAGS_FOR_TRACE@" \

7
scripts/mgnuc.in Normal file → Executable file
View File

@@ -25,6 +25,7 @@ C_COMPILER_TYPE=${MERCURY_C_COMPILER_TYPE="@C_COMPILER_TYPE@"}
CFLAGS_FOR_REGS="@CFLAGS_FOR_REGS@"
CFLAGS_FOR_GOTOS="@CFLAGS_FOR_GOTOS@"
CFLAGS_FOR_THREADS="@CFLAGS_FOR_THREADS@"
CFLAGS_FOR_LTO="@CFLAGS_FOR_LTO@"
CFLAGS_FOR_NO_STRICT_ALIASING="@CFLAGS_FOR_NO_STRICT_ALIASING@"
CFLAGS_FOR_ANSI="@CFLAGS_FOR_ANSI@"
CFLAGS_FOR_SANITIZERS="@CFLAGS_FOR_SANITIZERS@"
@@ -86,7 +87,7 @@ case "$C_COMPILER_TYPE" in
msvc*)
ANSI_OPTS=""
CHECK_OPTS="-nologo" # Suppress the MSVC banner message.
OPT_OPTS=""
OPT_OPTS="-O1"
# See README.MS-VisualC for why we don't enable C level debugging.
#DEBUG_OPTS="-Zi"
DEBUG_OPTS=""
@@ -514,6 +515,9 @@ esac
# if sanitizers were enabled at configure time, add CFLAGS_FOR_SANITIZERS
SANITIZER_OPTS="$CFLAGS_FOR_SANITIZERS"
# Use any applicable LTO options
LTO_OPTS="$CFLAGS_FOR_LTO"
#
# Special case hacks for particular architectures
# Any code here needs to be duplicated in ../configure.in.
@@ -645,6 +649,7 @@ ALL_CC_OPTS="$MERC_ALL_C_INCL_DIRS\
$ANSI_OPTS\
$CHECK_OPTS\
$OPT_OPTS\
$LTO_OPTS\
$HLC_OPTS\
$HLD_OPTS\
$GCC_OPTS\

6
scripts/ml.in
View File

@@ -49,6 +49,7 @@ LD_STATIC_FLAGS="@LD_STATIC_FLAGS@"
LDFLAGS_FOR_THREADS="@LDFLAGS_FOR_THREADS@"
LDFLAGS_FOR_TRACE="@LDFLAGS_FOR_TRACE@"
LD_LIBFLAGS_FOR_THREADS="@LD_LIBFLAGS_FOR_THREADS@"
LDFLAGS_FOR_LTO="@LDFLAGS_FOR_LTO@"
THREAD_LIBS="@THREAD_LIBS@"
HWLOC_LIBS="@HWLOC_LIBS@"
HWLOC_STATIC_LIBS="@HWLOC_STATIC_LIBS@"
@@ -408,6 +409,9 @@ else
NODEFAULTLIB_FLAG=""
fi
# Use any applicable LTO options
LTO_OPTS="$LDFLAGS_FOR_LTO"
case $make_shared_lib in
true)
LINKER="$LINK_SHARED_OBJ"
@@ -559,7 +563,7 @@ else
NOLOGO_OPTS=""
fi
LINKER_PRE_FLAGS="$NOLOGO_OPTS $MSVCRT_OPTS $PRINT_MAP_OPT $UNDEF_OPT $STRIP_OPTS $MAYBE_STATIC_OPT $ARCH_OPTS $SANITIZER_OPTS"
LINKER_PRE_FLAGS="$NOLOGO_OPTS $MSVCRT_OPTS $PRINT_MAP_OPT $UNDEF_OPT $STRIP_OPTS $LTO_OPTS $MAYBE_STATIC_OPT $ARCH_OPTS $SANITIZER_OPTS"
LINKER_POST_FLAGS="@LINK_OPT_SEP@ $NODEFAULTLIB_FLAG $DEBUG_FLAG $LIBDIR_OPTS $RPATH_OPT_LIST $LIBS"
case $verbose in