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-rw-r--r--patches/source/gcc/0002-i386-Use-reference-of-struct-ix86_frame-to-avoid-cop.diff72
1 files changed, 72 insertions, 0 deletions
diff --git a/patches/source/gcc/0002-i386-Use-reference-of-struct-ix86_frame-to-avoid-cop.diff b/patches/source/gcc/0002-i386-Use-reference-of-struct-ix86_frame-to-avoid-cop.diff
new file mode 100644
index 00000000..7b928df7
--- /dev/null
+++ b/patches/source/gcc/0002-i386-Use-reference-of-struct-ix86_frame-to-avoid-cop.diff
@@ -0,0 +1,72 @@
+From 18202ba32cb8de22fc43a5839235a751d0f5c4d9 Mon Sep 17 00:00:00 2001
+From: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Mon, 15 Jan 2018 11:28:44 +0000
+Subject: [PATCH 2/9] i386: Use reference of struct ix86_frame to avoid copy
+
+When there is no need to make a copy of ix86_frame, we can use reference
+of struct ix86_frame to avoid copy.
+
+ Backport from mainline
+ * config/i386/i386.c (ix86_can_use_return_insn_p): Use reference
+ of struct ix86_frame.
+ (ix86_initial_elimination_offset): Likewise.
+ (ix86_expand_split_stack_prologue): Likewise.
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@256692 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+ gcc/config/i386/i386.c | 9 +++------
+ gcc/testsuite/ChangeLog | 8 ++++++++
+ 2 files changed, 11 insertions(+), 6 deletions(-)
+
+diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
+index 8133372..397ef7c 100644
+--- a/src/gcc/config/i386/i386.c
++++ b/src/gcc/config/i386/i386.c
+@@ -11843,8 +11843,6 @@ symbolic_reference_mentioned_p (rtx op)
+ bool
+ ix86_can_use_return_insn_p (void)
+ {
+- struct ix86_frame frame;
+-
+ if (! reload_completed || frame_pointer_needed)
+ return 0;
+
+@@ -11857,7 +11855,7 @@ ix86_can_use_return_insn_p (void)
+ return 0;
+
+ ix86_compute_frame_layout ();
+- frame = cfun->machine->frame;
++ struct ix86_frame &frame = cfun->machine->frame;
+ return (frame.stack_pointer_offset == UNITS_PER_WORD
+ && (frame.nregs + frame.nsseregs) == 0);
+ }
+@@ -12344,7 +12342,7 @@ HOST_WIDE_INT
+ ix86_initial_elimination_offset (int from, int to)
+ {
+ ix86_compute_frame_layout ();
+- struct ix86_frame frame = cfun->machine->frame;
++ struct ix86_frame &frame = cfun->machine->frame;
+
+ if (from == ARG_POINTER_REGNUM && to == HARD_FRAME_POINTER_REGNUM)
+ return frame.hard_frame_pointer_offset;
+@@ -14860,7 +14858,6 @@ static GTY(()) rtx split_stack_fn_large;
+ void
+ ix86_expand_split_stack_prologue (void)
+ {
+- struct ix86_frame frame;
+ HOST_WIDE_INT allocate;
+ unsigned HOST_WIDE_INT args_size;
+ rtx_code_label *label;
+@@ -14873,7 +14870,7 @@ ix86_expand_split_stack_prologue (void)
+
+ ix86_finalize_stack_realign_flags ();
+ ix86_compute_frame_layout ();
+- frame = cfun->machine->frame;
++ struct ix86_frame &frame = cfun->machine->frame;
+ allocate = frame.stack_pointer_offset - INCOMING_FRAME_SP_OFFSET;
+
+ /* This is the label we will branch to if we have enough stack
+--
+2.7.4
+