[gcc r13-866] aarch64: Fix build with gcc-4.8

[gcc r13-866] aarch64: Fix build with gcc-4.8

[Christophe Lyon]

https://gcc.gnu.org/g:67d399d509c4c802d6dfb197886a5cc62ea62c5c

commit r13-866-g67d399d509c4c802d6dfb197886a5cc62ea62c5c
Author: Christophe Lyon <christophe.lyon@arm.com>
Date:   Tue May 31 16:11:47 2022 +0100

    aarch64: Fix build with gcc-4.8
    
    My r13-680-g0dc8e1e7026d9b commit to add support for Decimal Floating
    Point introduced:
          case SDmode:
          case DDmode:
          case TDmode:
    which are rejected by gcc-4.8 as build compiler.
    
    This patch replaces them with E_SDmode, E_DDmode and E_TD_mode.
    
    Committed as obvious.
    
            * config/aarch64/aarch64.cc (aarch64_gimplify_va_arg_expr):
            Prefix mode names with E_.

Diff:
---
 gcc/config/aarch64/aarch64.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index d4c575ce976..40fc5e63399 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -19748,15 +19748,15 @@ aarch64_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p,
 	  field_t = long_double_type_node;
 	  field_ptr_t = long_double_ptr_type_node;
 	  break;
-	case SDmode:
+	case E_SDmode:
 	  field_t = dfloat32_type_node;
 	  field_ptr_t = build_pointer_type (dfloat32_type_node);
 	  break;
-	case DDmode:
+	case E_DDmode:
 	  field_t = dfloat64_type_node;
 	  field_ptr_t = build_pointer_type (dfloat64_type_node);
 	  break;
-	case TDmode:
+	case E_TDmode:
 	  field_t = dfloat128_type_node;
 	  field_ptr_t = build_pointer_type (dfloat128_type_node);
 	  break;