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

[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

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fbf52031f5292d53b1f21c8736e7646e54c61821..e41335fafe3f508959f6242db34ec935b12ed61d 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -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

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 44ff59b5eb951533b349a43366a215dcd88011fc..9278e9590856cfd7c17a0643e539a7d2ebd93577 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -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.