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[COMMITTED] Update selftest such that [-Inf, +Inf] is always VARYING for -ffinite-math-only.

Message ID 20221022142529.376406-1-aldyh@redhat.com
State New
Headers show
Series [COMMITTED] Update selftest such that [-Inf, +Inf] is always VARYING for -ffinite-math-only. | expand

Commit Message

Aldy Hernandez Oct. 22, 2022, 2:25 p.m. UTC 
[-Inf, +Inf] +-NAN gets normalized as VARYING.  There is a test that
drops the NAN possibility, and tests that the range is no longer
VARYING but [-Inf, +Inf].  However, for -ffinite-math-only targets
(Vax, RX, etc) the range would still be VARYING because the VARYING
range never had a NAN to begin with.  This fixes the test.

I have a precommit hook that does self-tests with
-fno-finite-math-only, -ffinite-math-only, and -ffast-math as a sanity
check, but my precommit hook last week was disabled because there was
a tree-ssa.exp in mainline failing which was throwing off my scripts.
My apologies.

gcc/ChangeLog:

	* value-range.cc (range_tests_floats): Predicate [-Inf, +Inf] test
	with !flag_finite_math_only.
---
 gcc/value-range.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
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Patch

diff --git a/gcc/value-range.cc b/gcc/value-range.cc
index bcda4987307..d779e9819e2 100644
--- a/gcc/value-range.cc
+++ b/gcc/value-range.cc
@@ -3960,8 +3960,11 @@  range_tests_floats ()
   if (r0.maybe_isnan ())
     ASSERT_TRUE (r0.varying_p ());
   // ...unless it has some special property...
-  r0.clear_nan ();
-  ASSERT_FALSE (r0.varying_p ());
+  if (!flag_finite_math_only)
+    {
+      r0.clear_nan ();
+      ASSERT_FALSE (r0.varying_p ());
+    }
 
   // For most architectures, where float and double are different
   // sizes, having the same endpoints does not necessarily mean the