Adds the option to i386.opt and i386.c and adds documentation to
invoke.texi.
---
gcc/config/i386/i386.c | 1 +
gcc/config/i386/i386.opt | 5 +++++
gcc/doc/invoke.texi | 11 ++++++++++-
3 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 5ed8fb6..0e1d871 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -4290,6 +4290,7 @@ ix86_target_string (HOST_WIDE_INT isa, int flags, int
ix86_flags,
{ "-mavx256-split-unaligned-load", MASK_AVX256_SPLIT_UNALIGNED_LOAD},
{ "-mavx256-split-unaligned-store",
MASK_AVX256_SPLIT_UNALIGNED_STORE},
{ "-mprefer-avx128", MASK_PREFER_AVX128},
+ { "-mmoutline-msabi-xlogues", MASK_OUTLINE_MSABI_XLOGUES},
};
/* Additional flag options. */
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index 9eef558..f556978 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -528,6 +528,11 @@ Enum(calling_abi) String(sysv) Value(SYSV_ABI)
EnumValue
Enum(calling_abi) String(ms) Value(MS_ABI)
+moutline-msabi-xlogues
+Target Report Mask(OUTLINE_MSABI_XLOGUES) Save
+Reduces function size by using out-of-line stubs to save & restore registers
+clobberd by differences in Microsoft and System V ABIs.
+
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 8e2f466..4706085 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1188,7 +1188,7 @@ 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 -moutline-msabi-xlogues}
@emph{x86 Windows Options}
@gccoptlist{-mconsole -mcygwin -mno-cygwin -mdll @gol
@@ -25004,6 +25004,15 @@ You can control this behavior for specific functions by
using the function attributes @code{ms_abi} and @code{sysv_abi}.
@xref{Function Attributes}.
+@item -moutline-msabi-xlogues
+@itemx -mno-outline-msabi-xlogues
+@opindex moutline-msabi-xlogues
+Due to differences in 64-bit ABIs, any Microsoft ABI function that calls a
+SysV ABI function must consider RSI, RDI and XMM6-15 as clobbered, emitting
+fairly lengthy prologues & epilogues. This option generates prologues &
+epilogues that instead call stubs in libgcc to perform these saves & 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
--
2.9.0
