[flang] build test fix/suppression (llvm#118716)

Author: vdonaldson

flang/test/Evaluate/fold-ieee.f90

@@ -58,7 +58,7 @@ module m
   logical, parameter :: test_sn_all = ieee_support_subnormal()
   logical, parameter :: test_sn_4 = ieee_support_subnormal(1.)
   logical, parameter :: test_sn_8 = ieee_support_subnormal(1.d0)
-  logical, parameter :: test_uc_all = .not. ieee_support_underflow_control()
+! logical, parameter :: test_uc_all = .not. ieee_support_underflow_control() ! varies by architecture
   logical, parameter :: test_uc_4 = ieee_support_underflow_control(1.)
   logical, parameter :: test_uc_8 = ieee_support_underflow_control(1.d0)
 end

flang/test/Evaluate/folding18.f90

@@ -65,11 +65,12 @@ module m
     .and. ieee_support_subnormal(1.0_8) &
     .and. ieee_support_subnormal(1.0_10) &
     .and. ieee_support_subnormal(1.0_16)
-  logical, parameter :: test_ieee_support_underflow_control = .not. ieee_support_underflow_control() &
-    .and. .not. ieee_support_underflow_control(1.0_2) &
-    .and. ieee_support_underflow_control(1.0_3) &
-    .and. ieee_support_underflow_control(1.0_4) &
-    .and. ieee_support_underflow_control(1.0_8) &
-    .and. .not. ieee_support_underflow_control(1.0_10) &
-    .and. .not. ieee_support_underflow_control(1.0_16)
+! varies by architecture
+! logical, parameter :: test_ieee_support_underflow_control = .not. ieee_support_underflow_control() &
+!   .and. .not. ieee_support_underflow_control(1.0_2) &
+!   .and. ieee_support_underflow_control(1.0_3) &
+!   .and. ieee_support_underflow_control(1.0_4) &
+!   .and. ieee_support_underflow_control(1.0_8) &
+!   .and. .not. ieee_support_underflow_control(1.0_10) &
+!   .and. .not. ieee_support_underflow_control(1.0_16)
 end module