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mips.c (mips_prepare_pch_save): Initialize micromips_globals to zero.

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2016-10-13  Catherine Moore  <clm@codesourcery.com>

	* gcc/config/mips/mips.c (mips_prepare_pch_save): Initialize
	micromips_globals to zero.

From-SVN: r241165
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Catherine Moore 2016-10-14 10:21:06 -04:00 • committed by Catherine Moore
parent 1558d39e1c
commit df17106f1e
2 changed files with 23 additions and 16 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-10-14 Catherine Moore <clm@codesourcery.com>
* gcc/config/mips/mips.c (mips_prepare_pch_save): Initialize
micromips_globals to zero.
2016-10-14 Richard Biener <rguenther@suse.de>
PR tree-optimization/77979

34
gcc/config/mips/mips.c
View file

@ -20856,28 +20856,30 @@ mips_shift_truncation_mask (machine_mode mode)
static void
mips_prepare_pch_save (void)
{
/* We are called in a context where the current MIPS16 vs. non-MIPS16
setting should be irrelevant. The question then is: which setting
makes most sense at load time?
/* We are called in a context where the current compression vs.
non-compression setting should be irrelevant. The question then is:
which setting makes most sense at load time?
The PCH is loaded before the first token is read. We should never
have switched into MIPS16 mode by that point, and thus should not
have populated mips16_globals. Nor can we load the entire contents
of mips16_globals from the PCH file, because mips16_globals contains
a combination of GGC and non-GGC data.
The PCH is loaded before the first token is read. We should never have
switched into a compression mode by that point, and thus should not have
populated mips16_globals or micromips_globals. Nor can we load the
entire contents of mips16_globals or micromips_globals from the PCH file,
because they contain a combination of GGC and non-GGC data.
There is therefore no point in trying save the GGC part of
mips16_globals to the PCH file, or to preserve MIPS16ness across
the PCH save and load. The loading compiler would not have access
to the non-GGC parts of mips16_globals (either from the PCH file,
or from a copy that the loading compiler generated itself) and would
have to call target_reinit anyway.
mips16_globals/micromips_globals to the PCH file, or to preserve a
compression setting across the PCH save and load. The loading compiler
would not have access to the non-GGC parts of mips16_globals or
micromips_globals (either from the PCH file, or from a copy that the
loading compiler generated itself) and would have to call target_reinit
anyway.
It therefore seems best to switch back to non-MIPS16 mode at
save time, and to ensure that mips16_globals remains null after
a PCH load. */
It therefore seems best to switch back to non-MIPS16 mode and
non-microMIPS mode to save time, and to ensure that mips16_globals and
micromips_globals remain null after a PCH load. */
mips_set_compression_mode (0);
mips16_globals = 0;
micromips_globals = 0;
}
/* Generate or test for an insn that supports a constant permutation. */