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re PR rtl-optimization/70478 ([LRA] S/390: Performance regression - superfluous stack frame) 

2017-04-08  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/70478
	* lra-constraints.c: Reverse the last patch.

From-SVN: r246789
This commit is contained in:
Vladimir Makarov 2017-04-08 19:18:42 +00:00 committed by Vladimir Makarov
parent 8cfd4a9064
commit 8d2696f958
2 changed files with 5 additions and 15 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2017-04-08 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/70478
* lra-constraints.c: Reverse the last patch.
2017-04-08 Andreas Tobler <andreast@gcc.gnu.org>
* config/aarch64/aarch64-freebsd.h: Define MCOUNT_NAME.

15
gcc/lra-constraints.c
View File

@ -2685,21 +2685,6 @@ process_alt_operands (int only_alternative)
}
}
/* When we use memory operand, the insn should read the
value from memory and even if we just wrote a value
into the memory it is costly in comparison with an
insn alternative which does not use memory
(e.g. register or immediate operand). */
if (no_regs_p && offmemok)
{
if (lra_dump_file != NULL)
fprintf
(lra_dump_file,
" Using memory insn operand %d: reject+=3\n",
nop);
reject += 3;
}
#ifdef SECONDARY_MEMORY_NEEDED
/* If reload requires moving value through secondary
memory, it will need one more insn at least. */