From: Daniel Santos <daniel.santos@pobox.com>
To: gcc-patches <gcc-patches@gcc.gnu.org>
Cc: Sandra Loosemore <sandra@codesourcery.com>,
Uros Bizjak <ubizjak@gmail.com>, Jan Hubicka <hubicka@ucw.cz>
Subject: Re: [PATCH 05/12 rev 1] [i386] Add option -mcall-ms2sysv-xlogues
Date: Fri, 28 Apr 2017 07:37:00 -0000 [thread overview]
Message-ID: <20170428061216.17586-1-daniel.santos@pobox.com> (raw)
In-Reply-To: <5902768F.2010704@codesourcery.com>
Oops. I blame my fingers. :)
Daniel
---
gcc/config/i386/i386.c | 6 +++++-
gcc/config/i386/i386.opt | 4 ++++
gcc/doc/invoke.texi | 13 ++++++++++++-
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 113f83742c2..521116195cb 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4508,7 +4508,8 @@ ix86_target_string (HOST_WIDE_INT isa, HOST_WIDE_INT isa2,
{ "-mstv", MASK_STV },
{ "-mavx256-split-unaligned-load", MASK_AVX256_SPLIT_UNALIGNED_LOAD },
{ "-mavx256-split-unaligned-store", MASK_AVX256_SPLIT_UNALIGNED_STORE },
- { "-mprefer-avx128", MASK_PREFER_AVX128 }
+ { "-mprefer-avx128", MASK_PREFER_AVX128 },
+ { "-mcall-ms2sysv-xlogues", MASK_CALL_MS2SYSV_XLOGUES }
};
/* Additional flag options. */
@@ -6319,6 +6320,9 @@ ix86_option_override_internal (bool main_args_p,
#endif
}
+ if (TARGET_SEH && TARGET_CALL_MS2SYSV_XLOGUES)
+ sorry ("-mcall-ms2sysv-xlogues isn%'t currently supported with SEH");
+
if (!(opts_set->x_target_flags & MASK_VZEROUPPER))
opts->x_target_flags |= MASK_VZEROUPPER;
if (!(opts_set->x_target_flags & MASK_STV))
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index 9384e29b1de..65b228544a5 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -538,6 +538,10 @@ Enum(calling_abi) String(sysv) Value(SYSV_ABI)
EnumValue
Enum(calling_abi) String(ms) Value(MS_ABI)
+mcall-ms2sysv-xlogues
+Target Report Mask(CALL_MS2SYSV_XLOGUES) Save
+Use libgcc stubs to save and restore registers clobbered by 64-bit Microsoft to System V ABI calls.
+
mveclibabi=
Target RejectNegative Joined Var(ix86_veclibabi_type) Enum(ix86_veclibabi) Init(ix86_veclibabi_type_none)
Vector library ABI to use.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 0eeea7b3b87..d9894f37ee5 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1209,7 +1209,7 @@ See RS/6000 and PowerPC Options.
-msse2avx -mfentry -mrecord-mcount -mnop-mcount -m8bit-idiv @gol
-mavx256-split-unaligned-load -mavx256-split-unaligned-store @gol
-malign-data=@var{type} -mstack-protector-guard=@var{guard} @gol
--mmitigate-rop -mgeneral-regs-only}
+-mmitigate-rop -mgeneral-regs-only -mcall-ms2sysv-xlogues}
@emph{x86 Windows Options}
@gccoptlist{-mconsole -mcygwin -mno-cygwin -mdll @gol
@@ -25308,6 +25308,17 @@ You can control this behavior for specific functions by
using the function attributes @code{ms_abi} and @code{sysv_abi}.
@xref{Function Attributes}.
+@item -mcall-ms2sysv-xlogues
+@opindex mcall-ms2sysv-xlogues
+@opindex mno-call-ms2sysv-xlogues
+Due to differences in 64-bit ABIs, any Microsoft ABI function that calls a
+System V ABI function must consider RSI, RDI and XMM6-15 as clobbered. By
+default, the code for saving and restoring these registers is emitted inline,
+resulting in fairly lengthy prologues and epilogues. Using
+@option{-mcall-ms2sysv-xlogues} emits prologues and epilogues that
+use stubs in the static portion of libgcc to perform these saves and restores,
+thus reducing function size at the cost of a few extra instructions.
+
@item -mtls-dialect=@var{type}
@opindex mtls-dialect
Generate code to access thread-local storage using the @samp{gnu} or
--
2.11.0
next prev parent reply other threads:[~2017-04-28 6:07 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-27 8:05 [PATCH v4 0/12] [i386] Improve 64-bit Microsoft to System V ABI pro/epilogues Daniel Santos
2017-04-27 8:05 ` [PATCH 03/12] [i386] Use re-aligned stack pointer for aligned SSE movs Daniel Santos
2017-04-27 8:05 ` [PATCH 05/12] [i386] Add option -mcall-ms2sysv-xlogues Daniel Santos
2017-04-28 6:00 ` Sandra Loosemore
2017-04-28 7:37 ` Daniel Santos [this message]
2017-04-27 8:05 ` [PATCH 09/12] [i386] Add patterns and predicates foutline-msabi-xlouges Daniel Santos
2017-05-01 11:18 ` Uros Bizjak
2017-05-02 22:19 ` Daniel Santos
2017-05-03 6:17 ` Uros Bizjak
2017-05-03 7:38 ` Daniel Santos
2017-05-03 8:38 ` Uros Bizjak
2017-05-04 21:35 ` [PATCH 09/12 rev1] [i386] Add patterns and predicates mcall-ms2sysv-xlogues Daniel Santos
2017-04-27 8:05 ` [PATCH 11/12] [i386] Add remainder of -mcall-ms2sysv-xlogues implementation Daniel Santos
2017-05-04 22:11 ` [PATCH 11/12 rev1] " Daniel Santos
2017-04-27 8:05 ` [PATCH 12/12] [i386,testsuite] Test program for ms to sysv abi function calls Daniel Santos
2017-05-17 9:52 ` Thomas Preudhomme
2017-04-27 8:05 ` [PATCH 02/12] [i386] Keep stack pointer valid after after re-alignment Daniel Santos
2017-04-27 8:05 ` [PATCH 01/12] [i386] Re-align stack frame prior to SSE saves Daniel Santos
2017-04-27 8:05 ` [PATCH 08/12] [i386] Modify ix86_compute_frame_layout for -mcall-ms2sysv-xlogues Daniel Santos
2017-04-27 8:05 ` [PATCH 10/12] [i386] Add ms2sysv pro/epilogue stubs to libgcc Daniel Santos
2017-04-27 8:23 ` [PATCH 04/12] [i386] Minor refactoring Daniel Santos
2017-04-27 8:44 ` [PATCH 07/12] [i386] Modify ix86_save_reg to optionally omit stub-managed registers Daniel Santos
2017-04-27 8:51 ` [PATCH 06/12] [i386] Add class xlogue_layout and new fields to struct machine_function Daniel Santos
2017-04-27 18:32 ` [PATCH v4 0/12 GCC8] [i386] Improve 64-bit Microsoft to System V ABI pro/epilogues Daniel Santos
2017-05-01 11:31 ` [PATCH v4 0/12] " Uros Bizjak
2017-05-02 10:25 ` JonY
2017-05-02 10:45 ` Kai Tietz
2017-05-03 6:01 ` Daniel Santos
2017-05-05 9:05 ` Daniel Santos
2017-05-06 20:41 ` Daniel Santos
2017-05-08 20:07 ` Daniel Santos
2017-05-03 4:32 ` Daniel Santos
2017-05-13 0:01 ` [PING] " Daniel Santos
2017-05-13 18:29 ` Uros Bizjak
2017-05-13 23:43 ` Daniel Santos
2017-05-14 10:25 ` Uros Bizjak
2017-07-26 19:03 ` H.J. Lu
2017-07-27 0:36 ` Daniel Santos
2017-07-28 13:51 ` Daniel Santos
2017-07-28 14:41 ` H.J. Lu
2017-07-31 10:25 ` Daniel Santos
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