[gcc r10-9041] d: Explicitly determine which built-in copysign function to call.

[Iain Buclaw]

https://gcc.gnu.org/g:472547275286886a79bc2fec4aa08d0293b7da28

commit r10-9041-g472547275286886a79bc2fec4aa08d0293b7da28
Author: Iain Buclaw <ibuclaw@gdcproject.org>
Date:   Fri Nov 13 09:57:57 2020 +0100

    d: Explicitly determine which built-in copysign function to call.
    
    For some targets, mathfn_built_in returns NULL as copysign is not
    implicitly available, causing an ICE.  Now copysign is explicitly
    requested when expanding the intrinsic.
    
    gcc/d/ChangeLog:
    
            * intrinsics.cc (expand_intrinsic_copysign): Explicitly determine
            which built-in copysign function to call.
    
    (cherry picked from commit d975d6dce98a3e26ddd304d50dad2786b3acecc4)

Diff:
---
 gcc/d/intrinsics.cc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/gcc/d/intrinsics.cc b/gcc/d/intrinsics.cc
index c32819885bb..51cbd7b92fd 100644
--- a/gcc/d/intrinsics.cc
+++ b/gcc/d/intrinsics.cc
@@ -430,11 +430,14 @@ expand_intrinsic_copysign (tree callexp)
     from = fold_convert (type, from);
 
   /* Which variant of __builtin_copysign* should we call?  */
-  tree builtin = mathfn_built_in (type, BUILT_IN_COPYSIGN);
-  gcc_assert (builtin != NULL_TREE);
+  built_in_function code = (type == float_type_node) ? BUILT_IN_COPYSIGNF
+    : (type == double_type_node) ? BUILT_IN_COPYSIGN
+    : (type == long_double_type_node) ? BUILT_IN_COPYSIGNL
+    : END_BUILTINS;
 
-  return call_builtin_fn (callexp, DECL_FUNCTION_CODE (builtin), 2,
-			  to, from);
+  gcc_assert (code != END_BUILTINS);
+
+  return call_builtin_fn (callexp, code, 2, to, from);
 }
 
 /* Expand a front-end intrinsic call to pow().  This takes two arguments, the