testsuite/100272 - undo PRE disabling for gcc.dg/tree-ssa/predcom-1.c

This re-enables PRE and fixes the malformed dg directive pointed
out in the PR.  It all works as desired and I forgot why I
disabled this in the past.

2021-04-27  Richard Biener  <rguenther@suse.de>

	PR testsuite/100272
	* gcc.dg/tree-ssa/predcom-1.c: Re-enable PRE and fix
	malformed dg directive.

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c b/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c
index 4bc2ea5..f68be2b 100644 (file)
--- a/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-do run } */
-/* { dg-options "-O2 -funroll-loops --param max-unroll-times=8 -fpredictive-commoning -fdump-tree-pcom-details -fno-tree-pre" } */
+/* { dg-options "-O2 -funroll-loops --param max-unroll-times=8 -fpredictive-commoning -fdump-tree-pcom-details" } */
 
 void abort (void);
 
@@ -45,6 +45,5 @@ int main(void)
 /* Verify that both loops were transformed and unrolled.  */
 /* { dg-final { scan-tree-dump-times "Unrolling 2 times." 2 "pcom"} } */
 
-/* Also check that we undid the transformation previously made by PRE.
-   ???  PRE now does the predictive commoning in count_averages.  */
-/* dg-final { scan-tree-dump-times "looparound ref" 1 "pcom" } */
+/* Also check that we undid the transformation previously made by PRE.  */
+/* { dg-final { scan-tree-dump-times "looparound ref" 1 "pcom" } } */