[PATCH] testsuite/103278 - adjust gcc.dg/tree-ssa/if-to-switch-3.c

Richard Biener rguenther@suse.de
Thu Nov 18 08:52:07 GMT 2021


Analysis shows that after the CD-DCE change we produce better
code which makes if-to-switch run into case-values-threshold on
some architectures, thus the switch is deemed to simple to be
worth generating.  The following statically provides
--param case-values-threshold to make the testcase less
target dependent.

Tested on x86_64-unknown-linux-gnu, pushed.

2021-11-18  Richard Biener  <rguenther@suse.de>

	PR testsuite/103278
	* gcc.dg/tree-ssa/if-to-switch-3.c: Supply
	--param case-values-threshold=4.
---
 gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c
index 707e6304892..a55231b3341 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/if-to-switch-3.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized" } */
+/* Supplying case-values-threshold makes the testcase less target dependent.  */
+/* { dg-options "-O2 -fdump-tree-iftoswitch-optimized --param case-values-threshold=4" } */
 
 int IsMySuperRandomChar(int aChar)
 {
-- 
2.31.1


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