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db4caa1d54
With gcc -O2 -fPIC -flto -g -c -o a.o a.c gcc -O2 -fPIC -flto -g -mavx -c -o b.o b.c gcc -shared -O2 -fPIC -flto -g -o lib1.so a.o b.o LTO correctly generates AVX for b.o and SSE for a.o. But the GCC driver passes -msse2avx to assembler, which encodes SSE instructions as AVX instructions. We shouldn't pass -msse2avx to assembler for -mavx. Backport from mainline PR target/87522 * config/i386/gnu-user.h (ASM_SPEC): Don't pass -msse2avx to assembler for -mavx. * config/i386/gnu-user64.h (ASM_SPEC): Likewise. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-6-branch@265090 138bc75d-0d04-0410-961f-82ee72b054a4
139 lines
4.6 KiB
C
139 lines
4.6 KiB
C
/* Definitions for Intel 386 systems using GNU userspace.
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Copyright (C) 1994-2016 Free Software Foundation, Inc.
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Contributed by Eric Youngdale.
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Modified for stabs-in-ELF by H.J. Lu.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* Output at beginning of assembler file. */
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/* The .file command should always begin the output. */
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#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
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#undef ASM_COMMENT_START
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#define ASM_COMMENT_START "#"
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#undef DBX_REGISTER_NUMBER
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#define DBX_REGISTER_NUMBER(n) \
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(TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
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/* Output assembler code to FILE to call the profiler.
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To the best of my knowledge, no GNU userspace libc has required the label
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argument to mcount. */
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#define NO_PROFILE_COUNTERS 1
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#undef MCOUNT_NAME
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#define MCOUNT_NAME "mcount"
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/* The GLIBC version of mcount for the x86 assumes that there is a
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frame, so we cannot allow profiling without a frame pointer. */
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#undef SUBTARGET_FRAME_POINTER_REQUIRED
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#define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile
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#undef SIZE_TYPE
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#define SIZE_TYPE "unsigned int"
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE "int"
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "long int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE BITS_PER_WORD
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/* Provide a LINK_SPEC appropriate for GNU userspace. Here we provide support
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for the special GCC options -static and -shared, which allow us to
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link things in one of these three modes by applying the appropriate
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combinations of options at link-time.
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When the -shared link option is used a final link is not being
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done. */
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#undef ASM_SPEC
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#define ASM_SPEC \
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"--32 %{msse2avx:%{!mavx:-msse2avx}}"
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#undef SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS \
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{ "link_emulation", GNU_USER_LINK_EMULATION },\
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{ "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
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#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
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%{!shared: \
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%{!static: \
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%{rdynamic:-export-dynamic} \
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-dynamic-linker %(dynamic_linker)} \
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%{static:-static}}"
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#undef LINK_SPEC
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#define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
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/* A C statement (sans semicolon) to output to the stdio stream
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FILE the assembler definition of uninitialized global DECL named
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NAME whose size is SIZE bytes and alignment is ALIGN bytes.
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Try to use asm_output_aligned_bss to implement this macro. */
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#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
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/* A C statement to output to the stdio stream FILE an assembler
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command to advance the location counter to a multiple of 1<<LOG
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bytes if it is within MAX_SKIP bytes.
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This is used to align code labels according to Intel recommendations. */
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#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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do { \
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if ((LOG) != 0) { \
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if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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else { \
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fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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/* Make sure that we have at least 8 byte alignment if > 8 byte \
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alignment is preferred. */ \
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if ((LOG) > 3 \
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&& (1 << (LOG)) > ((MAX_SKIP) + 1) \
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&& (MAX_SKIP) >= 7) \
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fputs ("\t.p2align 3\n", (FILE)); \
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} \
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} \
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} while (0)
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#endif
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/* Handle special EH pointer encodings. Absolute, pc-relative, and
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indirect are handled automatically. */
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#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
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do { \
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if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel) \
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{ \
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fputs (ASM_LONG, FILE); \
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assemble_name (FILE, XSTR (ADDR, 0)); \
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fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
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goto DONE; \
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} \
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} while (0)
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#ifdef TARGET_LIBC_PROVIDES_SSP
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/* i386 glibc provides __stack_chk_guard in %gs:0x14. */
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#define TARGET_THREAD_SSP_OFFSET 0x14
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/* We steal the last transactional memory word. */
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#define TARGET_THREAD_SPLIT_STACK_OFFSET 0x30
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#endif
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