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re PR tree-optimization/71815 (SLSR misses several PHI candidate cases)

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[gcc]

2016-06-26  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/71815
	* gimple-ssa-strength-reduction.c (uses_consumed_by_stmt): New
	function.
	(find_basis_for_candidate): Call uses_consumed_by_stmt rather than
	has_single_use.
	(slsr_process_phi): Likewise.
	(replace_uncond_cands_and_profitable_phis): Don't replace a
	multiply candidate with a stride of 1 (copy or cast).
	(phi_incr_cost): Call uses_consumed_by_stmt rather than
	has_single_use.
	(lowest_cost_path): Likewise.
	(total_savings): Likewise.

[gcc/testsuite]

2016-06-26  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/71815
	* gcc.dg/tree-ssa/slsr-35.c: Remove -fno-code-hoisting workaround.
	* gcc.dg/tree-ssa/slsr-36.c: Likewise.

From-SVN: r249649
This commit is contained in:
William Schmidt 2017-06-26 14:19:33 +00:00
parent df11b2ea7f
commit 226ab0a808
2 changed files with 2 additions and 0 deletions
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gcc/ChangeLog
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@ -1,5 +1,6 @@
2016-06-26 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/71815
* gimple-ssa-strength-reduction.c (uses_consumed_by_stmt): New
function.
(find_basis_for_candidate): Call uses_consumed_by_stmt rather than

1
gcc/testsuite/ChangeLog
View file

@ -1,5 +1,6 @@
2016-06-26 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR/tree-optimization 71815
* gcc.dg/tree-ssa/slsr-35.c: Remove -fno-code-hoisting workaround.
* gcc.dg/tree-ssa/slsr-36.c: Likewise.