@@ -392,6 +392,9 @@ i[34567]86-*-*)
if test "x$enable_cld" = xyes; then
tm_defines="${tm_defines} USE_IX86_CLD=1"
fi
+ if test "x$enable_frame_pointer" = xyes; then
+ tm_defines="${tm_defines} USE_IX86_FRAME_POINTER=1"
+ fi
tm_file="vxworks-dummy.h ${tm_file}"
;;
x86_64-*-*)
@@ -399,6 +402,9 @@ x86_64-*-*)
if test "x$enable_cld" = xyes; then
tm_defines="${tm_defines} USE_IX86_CLD=1"
fi
+ if test "x$enable_frame_pointer" = xyes; then
+ tm_defines="${tm_defines} USE_IX86_FRAME_POINTER=1"
+ fi
tm_file="vxworks-dummy.h ${tm_file}"
;;
esac
@@ -2839,28 +2839,6 @@ override_options (bool main_args_p)
if (TARGET_MACHO && TARGET_64BIT)
flag_pic = 2;
- /* Set the default values for switches whose default depends on TARGET_64BIT
- in case they weren't overwritten by command line options. */
- if (TARGET_64BIT)
- {
- /* Mach-O doesn't support omitting the frame pointer for now. */
- if (flag_omit_frame_pointer == 2)
- flag_omit_frame_pointer = (TARGET_MACHO ? 0 : 1);
- if (flag_asynchronous_unwind_tables == 2)
- flag_asynchronous_unwind_tables = 1;
- if (flag_pcc_struct_return == 2)
- flag_pcc_struct_return = 0;
- }
- else
- {
- if (flag_omit_frame_pointer == 2)
- flag_omit_frame_pointer = 0;
- if (flag_asynchronous_unwind_tables == 2)
- flag_asynchronous_unwind_tables = 0;
- if (flag_pcc_struct_return == 2)
- flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
- }
-
/* Need to check -mtune=generic first. */
if (ix86_tune_string)
{
@@ -3148,6 +3126,34 @@ override_options (bool main_args_p)
for (i = 0; i < X86_TUNE_LAST; ++i)
ix86_tune_features[i] = !!(initial_ix86_tune_features[i] & ix86_tune_mask);
+#ifndef USE_IX86_FRAME_POINTER
+#define USE_IX86_FRAME_POINTER 0
+#endif
+
+ /* Set the default values for switches whose default depends on TARGET_64BIT
+ in case they weren't overwritten by command line options. */
+ if (TARGET_64BIT)
+ {
+ /* Mach-O doesn't support omitting the frame pointer for now. */
+ if (flag_omit_frame_pointer == 2)
+ flag_omit_frame_pointer = (TARGET_MACHO ? 0 : 1);
+ if (flag_asynchronous_unwind_tables == 2)
+ flag_asynchronous_unwind_tables = 1;
+ if (flag_pcc_struct_return == 2)
+ flag_pcc_struct_return = 0;
+ }
+ else
+ {
+ /* Mach-O doesn't support omitting the frame pointer for now. */
+ if (flag_omit_frame_pointer == 2)
+ flag_omit_frame_pointer =
+ (TARGET_MACHO ? 0 : !(USE_IX86_FRAME_POINTER || optimize_size));
+ if (flag_asynchronous_unwind_tables == 2)
+ flag_asynchronous_unwind_tables = !USE_IX86_FRAME_POINTER;
+ if (flag_pcc_struct_return == 2)
+ flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
+ }
+
if (optimize_size)
ix86_cost = &ix86_size_cost;
else
@@ -3430,7 +3436,8 @@ override_options (bool main_args_p)
prefix, suffix, sw);
}
- if ((x86_accumulate_outgoing_args & ix86_tune_mask)
+ if ((!USE_IX86_FRAME_POINTER
+ || (x86_accumulate_outgoing_args & ix86_tune_mask))
&& !(target_flags_explicit & MASK_ACCUMULATE_OUTGOING_ARGS)
&& !optimize_size)
target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
@@ -897,6 +897,7 @@ with_system_libunwind
enable_secureplt
enable_leading_mingw64_underscores
enable_cld
+enable_frame_pointer
enable_win32_registry
enable_static
with_pic
@@ -1596,6 +1597,7 @@ Optional Features:
--enable-leading-mingw64-underscores
Enable leading underscores on 64 bit mingw targets
--enable-cld enable -mcld by default for 32bit x86
+ --enable-frame-pointer enable -fno-omit-frame-pointer by default for 32bit x86
--disable-win32-registry
disable lookup of installation paths in the
Registry on Windows hosts
@@ -10707,6 +10709,24 @@ else
fi
+# Check whether --enable-frame-pointer was given.
+if test "${enable_frame_pointer+set}" = set; then :
+ enableval=$enable_frame_pointer;
+else
+
+case $target_os in
+linux*)
+ # Enable -fomit-frame-pointer by default for Linux.
+ enable_frame_pointer=no
+ ;;
+*)
+ enable_frame_pointer=yes
+ ;;
+esac
+
+fi
+
+
# Windows32 Registry support for specifying GCC installation paths.
# Check whether --enable-win32-registry was given.
if test "${enable_win32_registry+set}" = set; then :
@@ -17108,7 +17128,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 17111 "configure"
+#line 17131 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -17214,7 +17234,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 17217 "configure"
+#line 17237 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -1580,6 +1580,20 @@ AC_ARG_ENABLE(cld,
[ --enable-cld enable -mcld by default for 32bit x86], [],
[enable_cld=no])
+AC_ARG_ENABLE(frame-pointer,
+[ --enable-frame-pointer enable -fno-omit-frame-pointer by default for 32bit x86], [],
+[
+case $target_os in
+linux*)
+ # Enable -fomit-frame-pointer by default for Linux.
+ enable_frame_pointer=no
+ ;;
+*)
+ enable_frame_pointer=yes
+ ;;
+esac
+])
+
# Windows32 Registry support for specifying GCC installation paths.
AC_ARG_ENABLE(win32-registry,
[ --disable-win32-registry
@@ -1,6 +1,6 @@
/* { dg-do run } */
/* { dg-require-effective-target ilp32 } */
-/* { dg-options "-O2 -fomit-frame-pointer -mpush-args -mno-accumulate-outgoing-args" } */
+/* { dg-options "-O2 -fomit-frame-pointer -fno-asynchronous-unwind-tables -mpush-args -mno-accumulate-outgoing-args" } */
void abort (void);
@@ -1,6 +1,6 @@
/* { dg-do run } */
/* { dg-require-effective-target ilp32 } */
-/* { dg-options "-O2 -fomit-frame-pointer -mpush-args -mno-accumulate-outgoing-args -m128bit-long-double" } */
+/* { dg-options "-O2 -fomit-frame-pointer -fno-asynchronous-unwind-tables -mpush-args -mno-accumulate-outgoing-args -m128bit-long-double" } */
void abort (void);
@@ -1,7 +1,7 @@
/* { dg-do run { target *-*-linux* } } */
/* { dg-require-effective-target ilp32 } */
/* { dg-require-effective-target sse2 } */
-/* { dg-options "-O2 -fomit-frame-pointer -msse2 -mpush-args -mno-accumulate-outgoing-args" } */
+/* { dg-options "-O2 -fomit-frame-pointer -fno-asynchronous-unwind-tables -msse2 -mpush-args -mno-accumulate-outgoing-args" } */
#include "sse2-check.h"