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[COMMITTED, IA-64] doloop optimization across calls
- From: Jim Wilson <wilson at codesourcery dot com>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 19 Apr 2010 18:11:53 -0700
- Subject: [COMMITTED, IA-64] doloop optimization across calls
I noticed this while working on PR43520. Doloop by default does not
optimize loops with call insns. However, on IA-64, the loop counter
register is call saved, so we can and should optimize such loops. This
is fixed by replacing the default TARGET_INVALID_WITHIN_DOLOOP hook with
the null one, just like is already done in the s390 port.
This was tested with an ia64-linux C and C++ bootstrap and make check.
There were no regressions. This was also tested by hand on some small
testcases to verify that it was doing what I expected.
I've checked in the patch.
2010-04-19 James E. Wilson <email@example.com>
* config/ia64/ia64.c (TARGET_INVALID_WITHIN_DOLOOP): Define.
--- ia64.c (revision 158495)
+++ ia64.c (working copy)
@@ -537,6 +537,9 @@ static const struct attribute_spec ia64_
#define TARGET_TRAMPOLINE_INIT ia64_trampoline_init
+#define TARGET_INVALID_WITHIN_DOLOOP hook_constcharptr_const_rtx_null
#define TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE ia64_override_options_after_change