git
/
gcc
mirror of git://gcc.gnu.org/git/gcc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

regrename.c (regrename_do_replace): If replacing the same reg multiple times, try to reuse last created gen_raw_REG. 

* regrename.c (regrename_do_replace): If replacing the same
	reg multiple times, try to reuse last created gen_raw_REG.

From-SVN: r256596
This commit is contained in:
Jakub Jelinek 2018-01-12 21:04:14 +01:00 committed by Jakub Jelinek
parent 708c4094ee
commit d508a932f1
2 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,5 +1,8 @@
2018-01-12 Jakub Jelinek <jakub@redhat.com>
* regrename.c (regrename_do_replace): If replacing the same
reg multiple times, try to reuse last created gen_raw_REG.
PR debug/81155
* bb-reorder.c (pass_partition_blocks::gate): In lto don't partition
main to workaround a bug in GDB.
@ -1394,7 +1397,7 @@
2018-01-04 Jakub Jelinek <jakub@redhat.com>
PR debug/83666
* cfgexpand.c (expand_dbeug_expr) <case BIT_FIELD_REF>: Punt if mode
* cfgexpand.c (expand_debug_expr) <case BIT_FIELD_REF>: Punt if mode
is BLKmode and bitpos not zero or mode change is needed.
2018-01-04 Richard Sandiford <richard.sandiford@linaro.org>

17
gcc/regrename.c
View File

@ -963,6 +963,7 @@ regrename_do_replace (struct du_head *head, int reg)
struct du_chain *chain;
unsigned int base_regno = head->regno;
machine_mode mode;
rtx last_reg = NULL_RTX, last_repl = NULL_RTX;
for (chain = head->first; chain; chain = chain->next_use)
{
@ -975,12 +976,16 @@ regrename_do_replace (struct du_head *head, int reg)
gen_rtx_UNKNOWN_VAR_LOC (), true);
else
{
validate_change (chain->insn, chain->loc,
gen_raw_REG (GET_MODE (*chain->loc), reg), true);
if (regno >= FIRST_PSEUDO_REGISTER)
ORIGINAL_REGNO (*chain->loc) = regno;
REG_ATTRS (*chain->loc) = attr;
REG_POINTER (*chain->loc) = reg_ptr;
if (*chain->loc != last_reg)
{
last_repl = gen_raw_REG (GET_MODE (*chain->loc), reg);
if (regno >= FIRST_PSEUDO_REGISTER)
ORIGINAL_REGNO (last_repl) = regno;
REG_ATTRS (last_repl) = attr;
REG_POINTER (last_repl) = reg_ptr;
last_reg = *chain->loc;
}
validate_change (chain->insn, chain->loc, last_repl, true);
}
}