With commit r17-4469-ge35b8dad030bc4164fdaa81dc0a5bfca8c1bbfc3
"cselim: cond_if_else_store_replacement_limited support skipping on store one
either side [PR127053]",
we regressed:
PASS: libgomp.graphite/force-parallel-8.c (test for excess errors)
PASS: libgomp.graphite/force-parallel-8.c execution test
[-PASS:-]{+FAIL:+} libgomp.graphite/force-parallel-8.c scan-tree-dump-times
graphite "5 loops carried no dependency" 1
PASS: libgomp.graphite/force-parallel-8.c scan-tree-dump-times optimized
"loopfn.0" 4
PASS: libgomp.graphite/force-parallel-8.c scan-tree-dump-times optimized
"loopfn.1" 4
libgomp.graphite/force-parallel-8.c: pattern found 0 times
Indeed, instead of "5" it is now "3 loops carried no dependency".
Per 'diff' of '-fdump-tree-all-details-folding' for
commit r17-4469-ge35b8dad030bc4164fdaa81dc0a5bfca8c1bbfc3
"cselim: cond_if_else_store_replacement_limited support skipping on store one
either side [PR127053]"
reverted vs. current sources, I see in 'force-parallel-8.c.050t.phiopt1':
[...]
;; Function foo (foo, funcdef_no=0, decl_uid=2216, cgraph_uid=3,
symbol_order=2)
+factoring out stores:
+ then:
+# .MEM_30 = VDEF <.MEM_19>
+x[i_12][j_14] = _3;
+ else:
+# .MEM_29 = VDEF <.MEM_19>
+x[i_12][j_14] = _7;
+
+to use phi:
+cstore_33 = PHI <_3(11), _7(12)>
+
+# .MEM_18 = VDEF <.MEM_27>
+x[i_12][j_14] = cstore_33;
[...]
..., and subsequent simplification (as far as I can quickly tell) of the IR.
Restore the previous state via '-fno-expensive-optimizations', to continue
testing what was tested before.
PR tree-optimization/127053
libgomp/
* testsuite/libgomp.graphite/force-parallel-8.c:
'dg-additional-options -fno-expensive-optimizations'.
---
libgomp/testsuite/libgomp.graphite/force-parallel-8.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libgomp/testsuite/libgomp.graphite/force-parallel-8.c
b/libgomp/testsuite/libgomp.graphite/force-parallel-8.c
index ee5a67aa2b09..4dae03e1690d 100644
--- a/libgomp/testsuite/libgomp.graphite/force-parallel-8.c
+++ b/libgomp/testsuite/libgomp.graphite/force-parallel-8.c
@@ -1,4 +1,5 @@
/* { dg-additional-options "-fno-thread-jumps --param max-stores-to-sink=0" }
*/
+/* { dg-additional-options -fno-expensive-optimizations } */
#define N 1500
--
2.34.1
