From 0a1daff4f2255e8444e0deedd5ce55aa42e79c76 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 10 May 2015 13:16:35 +0000
Subject: gcc: add some size optimization patches
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45664 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../patches/4.8-linaro/020-no-plt-backport.patch | 28 ++++++++++++++++++++++
.../patches/4.8-linaro/851-libgcc_no_compat.patch | 12 ++++++++++
.../patches/4.9-linaro/020-no-plt-backport.patch | 28 ++++++++++++++++++++++
.../patches/4.9-linaro/851-libgcc_no_compat.patch | 12 ++++++++++
4 files changed, 80 insertions(+)
create mode 100644 toolchain/gcc/patches/4.8-linaro/020-no-plt-backport.patch
create mode 100644 toolchain/gcc/patches/4.8-linaro/851-libgcc_no_compat.patch
create mode 100644 toolchain/gcc/patches/4.9-linaro/020-no-plt-backport.patch
create mode 100644 toolchain/gcc/patches/4.9-linaro/851-libgcc_no_compat.patch
diff --git a/toolchain/gcc/patches/4.8-linaro/020-no-plt-backport.patch b/toolchain/gcc/patches/4.8-linaro/020-no-plt-backport.patch
new file mode 100644
index 0000000000..b225376865
--- /dev/null
+++ b/toolchain/gcc/patches/4.8-linaro/020-no-plt-backport.patch
@@ -0,0 +1,28 @@
+--- a/gcc/calls.c
++++ b/gcc/calls.c
+@@ -176,6 +176,12 @@ prepare_call_address (tree fndecl, rtx f
+ && targetm.small_register_classes_for_mode_p (FUNCTION_MODE))
+ ? force_not_mem (memory_address (FUNCTION_MODE, funexp))
+ : memory_address (FUNCTION_MODE, funexp));
++ else if (flag_pic && !flag_plt && fndecl
++ && TREE_CODE (fndecl) == FUNCTION_DECL
++ && !targetm.binds_local_p (fndecl))
++ {
++ funexp = force_reg (Pmode, funexp);
++ }
+ else if (! sibcallp)
+ {
+ #ifndef NO_FUNCTION_CSE
+--- a/gcc/common.opt
++++ b/gcc/common.opt
+@@ -1617,6 +1617,10 @@ fpie
+ Common Report Var(flag_pie,1) Negative(fPIC)
+ Generate position-independent code for executables if possible (small mode)
+
++fplt
++Common Report Var(flag_plt) Init(1)
++Use PLT for PIC calls (-fno-plt: load the address from GOT at call site)
++
+ fplugin=
+ Common Joined RejectNegative Var(common_deferred_options) Defer
+ Specify a plugin to load
diff --git a/toolchain/gcc/patches/4.8-linaro/851-libgcc_no_compat.patch b/toolchain/gcc/patches/4.8-linaro/851-libgcc_no_compat.patch
new file mode 100644
index 0000000000..80c3476841
--- /dev/null
+++ b/toolchain/gcc/patches/4.8-linaro/851-libgcc_no_compat.patch
@@ -0,0 +1,12 @@
+--- a/libgcc/config/t-libunwind
++++ b/libgcc/config/t-libunwind
+@@ -2,8 +2,7 @@
+
+ HOST_LIBGCC2_CFLAGS += -DUSE_GAS_SYMVER
+
+-LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
+- $(srcdir)/unwind-compat.c $(srcdir)/unwind-dw2-fde-compat.c
++LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+ LIB2ADDEHSTATIC = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+
+ # Override the default value from t-slibgcc-elf-ver and mention -lunwind
diff --git a/toolchain/gcc/patches/4.9-linaro/020-no-plt-backport.patch b/toolchain/gcc/patches/4.9-linaro/020-no-plt-backport.patch
new file mode 100644
index 0000000000..10cf323c08
--- /dev/null
+++ b/toolchain/gcc/patches/4.9-linaro/020-no-plt-backport.patch
@@ -0,0 +1,28 @@
+--- a/gcc/calls.c
++++ b/gcc/calls.c
+@@ -184,6 +184,12 @@ prepare_call_address (tree fndecl, rtx f
+ && targetm.small_register_classes_for_mode_p (FUNCTION_MODE))
+ ? force_not_mem (memory_address (FUNCTION_MODE, funexp))
+ : memory_address (FUNCTION_MODE, funexp));
++ else if (flag_pic && !flag_plt && fndecl
++ && TREE_CODE (fndecl) == FUNCTION_DECL
++ && !targetm.binds_local_p (fndecl))
++ {
++ funexp = force_reg (Pmode, funexp);
++ }
+ else if (! sibcallp)
+ {
+ #ifndef NO_FUNCTION_CSE
+--- a/gcc/common.opt
++++ b/gcc/common.opt
+@@ -1659,6 +1659,10 @@ fpie
+ Common Report Var(flag_pie,1) Negative(fPIC)
+ Generate position-independent code for executables if possible (small mode)
+
++fplt
++Common Report Var(flag_plt) Init(1)
++Use PLT for PIC calls (-fno-plt: load the address from GOT at call site)
++
+ fplugin=
+ Common Joined RejectNegative Var(common_deferred_options) Defer
+ Specify a plugin to load
diff --git a/toolchain/gcc/patches/4.9-linaro/851-libgcc_no_compat.patch b/toolchain/gcc/patches/4.9-linaro/851-libgcc_no_compat.patch
new file mode 100644
index 0000000000..80c3476841
--- /dev/null
+++ b/toolchain/gcc/patches/4.9-linaro/851-libgcc_no_compat.patch
@@ -0,0 +1,12 @@
+--- a/libgcc/config/t-libunwind
++++ b/libgcc/config/t-libunwind
+@@ -2,8 +2,7 @@
+
+ HOST_LIBGCC2_CFLAGS += -DUSE_GAS_SYMVER
+
+-LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c \
+- $(srcdir)/unwind-compat.c $(srcdir)/unwind-dw2-fde-compat.c
++LIB2ADDEH = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+ LIB2ADDEHSTATIC = $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c
+
+ # Override the default value from t-slibgcc-elf-ver and mention -lunwind
--
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