path: root/gcc-4.9/gcc/hooks.c
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authorCarrot Wei <carrot@google.com>2014-05-15 02:06:33 (GMT)
committerAndrew Hsieh <andrewhsieh@google.com>2014-05-15 07:59:04 (GMT)
commit331e362574142e4c1d9d509533d1c96b6dc54d13 (patch)
treeb078d9e04e3437c2d322b4d3406fedc973833440 /gcc-4.9/gcc/hooks.c
parent5cd97bdbf2d97af4b0e4301f5f2b6c2a4301baf9 (diff)
[4.8, 4.9] Add simplify-got
This pass optimize GOT_PREL (already exists in toolchain/gcc/gcc-4.6) Backport from svn://gcc.gnu.org/svn/gcc/branches/google/gcc-4_6-mobile UNSPEC_GOT_PREL_SYM is now in new file arm/unspecs.md 4.9 port is slightly different due to changes in gcc passes See Google b/14811006 r173209 | carrot | 2011-04-30 16:07:46 +0800 (Sat, 30 Apr 2011) | 21 lines * hooks.c (hook_rtx_void_null): New function. * hooks.h (hook_rtx_void_null): New prototype. * target.def (got_access): New hook vector declaration. * tree-pass.h (pass_simplify_got): New pass. * timevar.def (TV_SIMPLIFY_GOT): New TV id. * simplify-got.c: New source file. * Makefile.in (simplify-got.o): Add a new file. * passes.c (init_optimization_passes): Add a new pass. * config/arm/arm.c (arm_output_addr_const_extra): Output GOT_PREL relocation. (arm_get_pic_reg): New function. (arm_clear_pic_reg): New function. (arm_can_simplify_got_access): New function. (arm_loaded_global_var): New function. (arm_load_global_address): New function. * config/arm/arm.md (UNSPEC_GOT_PREL_SYM): New UNSPEC symbol. * testsuite/gcc.target/arm/got1.c: New testcase. * testsuite/gcc.target/arm/got2.c: New testcase. Change-Id: I91e881df19bb6937a5fbcc8e6b83d158717c7773
Diffstat (limited to 'gcc-4.9/gcc/hooks.c')
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/hooks.c b/gcc-4.9/gcc/hooks.c
index 1c67bdf..1038454 100644
--- a/gcc-4.9/gcc/hooks.c
+++ b/gcc-4.9/gcc/hooks.c
@@ -365,6 +365,13 @@ hook_uint_mode_0 (enum machine_mode m ATTRIBUTE_UNUSED)
return 0;
+/* Generic hook that returns NULL_RTX. */
+hook_rtx_void_null (void)
+ return NULL;
/* Generic hook that takes three trees and returns the last one as is. */
hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,