From: Roger Sayle <roger@nextmovesoftware.com>
Date: Thu, 8 Aug 2024 10:16:29 +0000 (+0100)
Subject: i386: Tweak ix86_mode_can_transfer_bits to restore bootstrap on RHEL.
X-Git-Tag: basepoints/gcc-16~6737
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d44f3fc387815eb232d7757352857993a1d21d9;p=thirdparty%2Fgcc.git

i386: Tweak ix86_mode_can_transfer_bits to restore bootstrap on RHEL.

This minor patch, very similar to one posted and approved previously at
https://gcc.gnu.org/pipermail/gcc-patches/2024-July/657229.html is
required to restore builds on systems using gcc 4.8 as a host compiler.
Using the enumeration constants E_SFmode and E_DFmode avoids issues with
SFmode and DFmode being "non-literal types in constant expressions".

2024-08-08  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog
	* config/i386/i386.cc (ix86_mode_can_transfer_bits): Use E_?Fmode
	enumeration constants in switch statement.
---

diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 8f289b5bc22..02e28290441 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -26113,8 +26113,8 @@ ix86_mode_can_transfer_bits (machine_mode mode)
       || GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
     switch (GET_MODE_INNER (mode))
       {
-      case SFmode:
-      case DFmode:
+      case E_SFmode:
+      case E_DFmode:
 	/* These suffer from normalization upon load when not using SSE.  */
 	return !(ix86_fpmath & FPMATH_387);
       default: