re PR debug/25023 (ICE in def_cfa_1, at dwarf2out.c:792)

	PR debug/25023
	* config/i386/i386.c (ix86_force_to_memory): Always use
	SImode push for HImode in -m32.
	(ix86_free_from_memory): Likewise.

	* gcc.dg/pr25023.c: New test.

From-SVN: r108537

gcc/ChangeLog

+2005-12-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/25023
+	* config/i386/i386.c (ix86_force_to_memory): Always use
+	SImode push for HImode in -m32.
+	(ix86_free_from_memory): Likewise.
+
 2005-12-14  Richard Sandiford  <richard@codesourcery.com>
 
 	* gcc/config/arm/arm.md: Provide a big-endian version of the

gcc/config/i386/i386.c

@@ -15790,9 +15790,8 @@ ix86_force_to_memory (enum machine_mode mode, rtx operand)
 	  }
 	  break;
 	case HImode:
-	  /* It is better to store HImodes as SImodes.  */
-	  if (!TARGET_PARTIAL_REG_STALL)
-	    operand = gen_lowpart (SImode, operand);
+	  /* Store HImodes as SImodes.  */
+	  operand = gen_lowpart (SImode, operand);
 	  /* FALLTHRU */
 	case SImode:
 	  emit_insn (
@@ -15820,8 +15819,6 @@ ix86_free_from_memory (enum machine_mode mode)
 
       if (mode == DImode || TARGET_64BIT)
 	size = 8;
-      else if (mode == HImode && TARGET_PARTIAL_REG_STALL)
-	size = 2;
       else
 	size = 4;
       /* Use LEA to deallocate stack space.  In peephole2 it will be converted

gcc/testsuite/ChangeLog

+2005-12-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/25023
+	* gcc.dg/pr25023.c: New test.
+
 2005-12-14  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* g++.old-deja/g++.brendan/redecl1.C,

gcc/testsuite/gcc.dg/pr25023.c

+/* PR debug/25023 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-options "-O2 -mtune=i686" { target { { i?86-*-* || x86_64-*-* } && ilp32 } } } */
+
+extern unsigned char v;
+
+float
+foo (void)
+{
+  return v;
+}