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| author | zqchen <zqchen@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-05-15 06:54:48 +0000 |
|---|---|---|
| committer | zqchen <zqchen@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-05-15 06:54:48 +0000 |
| commit | 59483f68e3dc09f4ce9ac070be4b7c57fc1e5e18 (patch) | |
| tree | 7b099524607ef851d55ab807f10d94713196c9d1 /gcc/shrink-wrap.c | |
| parent | 808bdd173056b18aa4d8a0ffd5071dbf1ad5892c (diff) | |
| download | gcc-59483f68e3dc09f4ce9ac070be4b7c57fc1e5e18.tar.gz | |
2014-05-15 Zhenqiang Chen <zhenqiang.chen@linaro.org>
* regcprop.h: New file.
* regcprop.c (skip_debug_insn_p): New decl.
(replace_oldest_value_reg): Check skip_debug_insn_p.
(copyprop_hardreg_forward_bb_without_debug_insn.): New function.
* shrink-wrap.c: include regcprop.h
(prepare_shrink_wrap):
Call copyprop_hardreg_forward_bb_without_debug_insn.
testsuite/ChangeLog:
2014-05-15 Zhenqiang Chen <zhenqiang.chen@linaro.org>
* shrink-wrap-loop.c: New test case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@210458 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/shrink-wrap.c')
| -rw-r--r-- | gcc/shrink-wrap.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/shrink-wrap.c b/gcc/shrink-wrap.c index 6f0cd0c99d2..f09cfe7b1f9 100644 --- a/gcc/shrink-wrap.c +++ b/gcc/shrink-wrap.c @@ -52,7 +52,7 @@ along with GCC; see the file COPYING3. If not see #include "params.h" #include "bb-reorder.h" #include "shrink-wrap.h" - +#include "regcprop.h" #ifdef HAVE_simple_return @@ -320,6 +320,15 @@ prepare_shrink_wrap (basic_block entry_block) df_ref *ref; bool split_p = false; + if (JUMP_P (BB_END (entry_block))) + { + /* To have more shrink-wrapping opportunities, prepare_shrink_wrap tries + to sink the copies from parameter to callee saved register out of + entry block. copyprop_hardreg_forward_bb_without_debug_insn is called + to release some dependences. */ + copyprop_hardreg_forward_bb_without_debug_insn (entry_block); + } + CLEAR_HARD_REG_SET (uses); CLEAR_HARD_REG_SET (defs); FOR_BB_INSNS_REVERSE_SAFE (entry_block, insn, curr) |