diff options
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-6.4/backport/0003-i386-Use-const-reference-of-struct-ix86_frame-to-avo.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-6.4/backport/0003-i386-Use-const-reference-of-struct-ix86_frame-to-avo.patch | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-6.4/backport/0003-i386-Use-const-reference-of-struct-ix86_frame-to-avo.patch b/meta/recipes-devtools/gcc/gcc-6.4/backport/0003-i386-Use-const-reference-of-struct-ix86_frame-to-avo.patch new file mode 100644 index 0000000000..a5ffd85d6f --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-6.4/backport/0003-i386-Use-const-reference-of-struct-ix86_frame-to-avo.patch @@ -0,0 +1,131 @@ +From 82243732dc63e9b90396a5ae4ad99ca36af81355 Mon Sep 17 00:00:00 2001 +From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> +Date: Sat, 27 Jan 2018 13:10:24 +0000 +Subject: [PATCH 03/12] i386: Use const reference of struct ix86_frame to avoid + copy + +We can use const reference of struct ix86_frame to avoid making a local +copy of ix86_frame. ix86_expand_epilogue makes a local copy of struct +ix86_frame and uses the reg_save_offset field as a local variable. This +patch uses a separate local variable for reg_save_offset. + +Tested on x86-64 with ada. + + Backport from mainline + PR target/83905 + * config/i386/i386.c (ix86_expand_prologue): Use cost reference + of struct ix86_frame. + (ix86_expand_epilogue): Likewise. Add a local variable for + the reg_save_offset field in struct ix86_frame. + +git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@257123 138bc75d-0d04-0410-961f-82ee72b054a4 + +Upstream-Status: Pending + +Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> + +--- + gcc/config/i386/i386.c | 24 ++++++++++++------------ + 1 file changed, 12 insertions(+), 12 deletions(-) + +diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c +index 13ebf10..6c98f75 100644 +--- a/gcc/config/i386/i386.c ++++ b/gcc/config/i386/i386.c +@@ -12633,7 +12633,6 @@ ix86_expand_prologue (void) + { + struct machine_function *m = cfun->machine; + rtx insn, t; +- struct ix86_frame frame; + HOST_WIDE_INT allocate; + bool int_registers_saved; + bool sse_registers_saved; +@@ -12657,7 +12656,7 @@ ix86_expand_prologue (void) + m->fs.sp_valid = true; + + ix86_compute_frame_layout (); +- frame = m->frame; ++ const struct ix86_frame &frame = cfun->machine->frame; + + if (!TARGET_64BIT && ix86_function_ms_hook_prologue (current_function_decl)) + { +@@ -13329,13 +13328,12 @@ ix86_expand_epilogue (int style) + { + struct machine_function *m = cfun->machine; + struct machine_frame_state frame_state_save = m->fs; +- struct ix86_frame frame; + bool restore_regs_via_mov; + bool using_drap; + + ix86_finalize_stack_realign_flags (); + ix86_compute_frame_layout (); +- frame = m->frame; ++ const struct ix86_frame &frame = cfun->machine->frame; + + m->fs.sp_valid = (!frame_pointer_needed + || (crtl->sp_is_unchanging +@@ -13377,11 +13375,13 @@ ix86_expand_epilogue (int style) + + UNITS_PER_WORD); + } + ++ HOST_WIDE_INT reg_save_offset = frame.reg_save_offset; ++ + /* Special care must be taken for the normal return case of a function + using eh_return: the eax and edx registers are marked as saved, but + not restored along this path. Adjust the save location to match. */ + if (crtl->calls_eh_return && style != 2) +- frame.reg_save_offset -= 2 * UNITS_PER_WORD; ++ reg_save_offset -= 2 * UNITS_PER_WORD; + + /* EH_RETURN requires the use of moves to function properly. */ + if (crtl->calls_eh_return) +@@ -13397,11 +13397,11 @@ ix86_expand_epilogue (int style) + else if (TARGET_EPILOGUE_USING_MOVE + && cfun->machine->use_fast_prologue_epilogue + && (frame.nregs > 1 +- || m->fs.sp_offset != frame.reg_save_offset)) ++ || m->fs.sp_offset != reg_save_offset)) + restore_regs_via_mov = true; + else if (frame_pointer_needed + && !frame.nregs +- && m->fs.sp_offset != frame.reg_save_offset) ++ && m->fs.sp_offset != reg_save_offset) + restore_regs_via_mov = true; + else if (frame_pointer_needed + && TARGET_USE_LEAVE +@@ -13439,7 +13439,7 @@ ix86_expand_epilogue (int style) + rtx t; + + if (frame.nregs) +- ix86_emit_restore_regs_using_mov (frame.reg_save_offset, style == 2); ++ ix86_emit_restore_regs_using_mov (reg_save_offset, style == 2); + + /* eh_return epilogues need %ecx added to the stack pointer. */ + if (style == 2) +@@ -13529,19 +13529,19 @@ ix86_expand_epilogue (int style) + epilogues. */ + if (!m->fs.sp_valid + || (TARGET_SEH +- && (m->fs.sp_offset - frame.reg_save_offset ++ && (m->fs.sp_offset - reg_save_offset + >= SEH_MAX_FRAME_SIZE))) + { + pro_epilogue_adjust_stack (stack_pointer_rtx, hard_frame_pointer_rtx, + GEN_INT (m->fs.fp_offset +- - frame.reg_save_offset), ++ - reg_save_offset), + style, false); + } +- else if (m->fs.sp_offset != frame.reg_save_offset) ++ else if (m->fs.sp_offset != reg_save_offset) + { + pro_epilogue_adjust_stack (stack_pointer_rtx, stack_pointer_rtx, + GEN_INT (m->fs.sp_offset +- - frame.reg_save_offset), ++ - reg_save_offset), + style, + m->fs.cfa_reg == stack_pointer_rtx); + } +-- +2.7.4 + |