[PATCH] c-family, c++: Handle EXCESS_PRECISION_EXPR in pretty printers

[Jakub Jelinek <jakub@redhat.com>]

Hi!

I've noticed that the c-c++-common/gomp/depobj-3.c test FAILs on i686-linux:
PASS: c-c++-common/gomp/depobj-3.c  -std=c++17  at line 17 (test for warnings, line 15)
FAIL: c-c++-common/gomp/depobj-3.c  -std=c++17  at line 39 (test for warnings, line 37)
PASS: c-c++-common/gomp/depobj-3.c  -std=c++17  at line 43 (test for errors, line 41)
PASS: c-c++-common/gomp/depobj-3.c  -std=c++17  (test for warnings, line 45)
FAIL: c-c++-common/gomp/depobj-3.c  -std=c++17 (test for excess errors)
Excess errors:
/home/jakub/src/gcc/gcc/testsuite/c-c++-common/gomp/depobj-3.c:37:38: warning: the 'destroy' expression ''excess_precision_expr' not supported by dump_expr<expression error>' should be the same as the 'depobj' argument 'obj' [-Wopenmp]
The following patch replaces that 'excess_precision_expr' not supported by dump_expr<expression error>
with (float)(((long double)a) + (long double)5)
Still ugly and doesn't actually fix the FAIL (will deal with that
incrementally), but at least valid C/C++ and shows the excess precision
handling in action.

Ok for trunk if this passes bootstrap/regtest?

2024-03-22  Jakub Jelinek  <jakub@redhat.com>

gcc/c/
	* c-pretty-print.cc (pp_c_cast_expression,
	c_pretty_printer::expression): Handle EXCESS_PRECISION_EXPR like
	NOP_EXPR.
gcc/cp/
	* error.cc (dump_expr): Handle EXCESS_PRECISION_EXPR like NOP_EXPR.

--- gcc/c-family/c-pretty-print.cc.jj	2024-01-12 10:07:57.744858004 +0100
+++ gcc/c-family/c-pretty-print.cc	2024-03-22 09:58:56.640001991 +0100
@@ -2327,6 +2327,7 @@ pp_c_cast_expression (c_pretty_printer *
     case FIX_TRUNC_EXPR:
     CASE_CONVERT:
     case VIEW_CONVERT_EXPR:
+    case EXCESS_PRECISION_EXPR:
       if (!location_wrapper_p (e))
 	pp_c_type_cast (pp, TREE_TYPE (e));
       pp_c_cast_expression (pp, TREE_OPERAND (e, 0));
@@ -2753,6 +2754,7 @@ c_pretty_printer::expression (tree e)
     case FIX_TRUNC_EXPR:
     CASE_CONVERT:
     case VIEW_CONVERT_EXPR:
+    case EXCESS_PRECISION_EXPR:
       pp_c_cast_expression (this, e);
       break;
 
--- gcc/cp/error.cc.jj	2024-01-20 12:32:34.157939870 +0100
+++ gcc/cp/error.cc	2024-03-22 10:00:38.259610171 +0100
@@ -2662,6 +2662,7 @@ dump_expr (cxx_pretty_printer *pp, tree
     CASE_CONVERT:
     case IMPLICIT_CONV_EXPR:
     case VIEW_CONVERT_EXPR:
+    case EXCESS_PRECISION_EXPR:
       {
 	tree op = TREE_OPERAND (t, 0);
 

	Jakub