diff options
| author | kyukhin <kyukhin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-11-07 08:47:15 +0000 |
|---|---|---|
| committer | kyukhin <kyukhin@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-11-07 08:47:15 +0000 |
| commit | 8a321966c53867d68e5528c9935a3570349010a8 (patch) | |
| tree | 2501b8e1269ccfd5641293b19f8449fd7d94719f | |
| parent | 9efaf576cea19c6a1c5272af7e5c9eba26152c91 (diff) | |
gcc/
PR target/50962
* config/i386/i386-protos.h (ix86_use_lea_for_mov): New.
* config/i386/i386.c (ix86_use_lea_for_mov): Likewise.
* config/i386/i386.md (movsi_internal): Emit lea if profitable.
(movdi_internal_rex64): Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@181077 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/config/i386/i386-protos.h | 1 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 23 | ||||
| -rw-r--r-- | gcc/config/i386/i386.md | 7 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 7 |
4 files changed, 37 insertions, 1 deletions
diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h index b2eb9733559..6bfe13d47d6 100644 --- a/gcc/config/i386/i386-protos.h +++ b/gcc/config/i386/i386-protos.h @@ -93,6 +93,7 @@ extern bool ix86_binary_operator_ok (enum rtx_code, enum machine_mode, rtx[]); extern bool ix86_lea_outperforms (rtx, unsigned int, unsigned int, unsigned int, unsigned int); extern bool ix86_avoid_lea_for_add (rtx, rtx[]); +extern bool ix86_use_lea_for_mov (rtx, rtx[]); extern bool ix86_avoid_lea_for_addr (rtx, rtx[]); extern void ix86_split_lea_for_addr (rtx[], enum machine_mode); extern bool ix86_lea_for_add_ok (rtx, rtx[]); diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index ca62b229089..b735ab555e0 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -16509,6 +16509,29 @@ ix86_avoid_lea_for_add (rtx insn, rtx operands[]) return !ix86_lea_outperforms (insn, regno0, regno1, regno2, 1); } +/* Return true if we should emit lea instruction instead of mov + instruction. */ + +bool +ix86_use_lea_for_mov (rtx insn, rtx operands[]) +{ + unsigned int regno0; + unsigned int regno1; + + /* Check if we need to optimize. */ + if (!TARGET_OPT_AGU || optimize_function_for_size_p (cfun)) + return false; + + /* Use lea for reg to reg moves only. */ + if (!REG_P (operands[0]) || !REG_P (operands[1])) + return false; + + regno0 = true_regnum (operands[0]); + regno1 = true_regnum (operands[1]); + + return ix86_lea_outperforms (insn, regno0, regno1, -1, 0); +} + /* Return true if we need to split lea into a sequence of instructions to avoid AGU stalls. */ diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 39c4cd73f69..d6a82b654cd 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -2053,6 +2053,8 @@ return "mov{l}\t{%k1, %k0|%k0, %k1}"; else if (which_alternative == 2) return "movabs{q}\t{%1, %0|%0, %1}"; + else if (ix86_use_lea_for_mov(insn, operands)) + return "lea{q}\t{%a1, %0|%0, %a1}"; else return "mov{q}\t{%1, %0|%0, %1}"; } @@ -2288,7 +2290,10 @@ default: gcc_assert (!flag_pic || LEGITIMATE_PIC_OPERAND_P (operands[1])); - return "mov{l}\t{%1, %0|%0, %1}"; + if (ix86_use_lea_for_mov(insn, operands)) + return "lea{l}\t{%a1, %0|%0, %a1}"; + else + return "mov{l}\t{%1, %0|%0, %1}"; } } [(set (attr "type") diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 7e7209c1d63..66e56ee0aa5 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2011-11-07 Enkovich Ilya <ilya.enkovich@intel.com> + + PR target/50962 + * config/i386/i386-protos.h (ix86_use_lea_for_mov): New. + * config/i386/i386.c (ix86_use_lea_for_mov): Likewise. + * config/i386/i386.md (movsi_internal): Emit lea if profitable. + (movdi_internal_rex64): Likewise. 2011-11-07 Sergey Ostanevich <sergos.gnu@gmail.com> |