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re PR tree-optimization/69196 (code size regression with jump threading at -O2)

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PR tree-optimization/69196
	* tree-ssa-threadbackward.c (fsm_find_control_statement_thread_paths):
	If the both SSA_NAMEs are anonymous, then consider them unassociated
	and include the PHI in the statement count.

From-SVN: r233999
This commit is contained in:
Jeff Law 2016-03-04 22:10:58 -07:00 • committed by Jeff Law
parent 640b7e7439
commit 5c03c4211d
2 changed files with 12 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-03-04 Jeff Law <law@redhat.com>
PR tree-optimization/69196
* tree-ssa-threadbackward.c (fsm_find_control_statement_thread_paths):
If the both SSA_NAMEs are anonymous, then consider them unassociated
and include the PHI in the statement count.
2016-03-05 Tom de Vries <tom@codesourcery.com>
* omp-low.c (check_omp_nesting_restrictions): Check for non-oacc

6
gcc/tree-ssa-threadbackward.c
View file

@ -311,7 +311,11 @@ fsm_find_control_statement_thread_paths (tree name,
gphi *phi = gsip.phi ();
tree dst = gimple_phi_result (phi);
if (SSA_NAME_VAR (dst) != SSA_NAME_VAR (name)
/* Note that if both NAME and DST are anonymous
SSA_NAMEs, then we do not have enough information
to consider them associated. */
if ((SSA_NAME_VAR (dst) != SSA_NAME_VAR (name)
|| !SSA_NAME_VAR (dst))
&& !virtual_operand_p (dst))
++n_insns;
}