re PR target/55712 (cpuinfo.c doesn't compile for x86-64 with medium memory model)

	PR target/55712
	* config/i386/i386-c.c (ix86_target_macros_internal): Depending on
	selected code model, define __code_mode_small__, __code_model_medium__,
	__code_model_large__, __code_model_32__ or __code_model_kernel__.
	* config/i386/cpuid.h (__cpuid, __cpuid_count) [__i386__]: Prefix
	xchg temporary register with %k.  Declare temporary register as
	early clobbered.
	[__x86_64__]: For medium and large code models, preserve %rbx register.

From-SVN: r194862

3 files changed, 64 insertions, 14 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 033d272..740b8ac 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,14 @@
+2013-01-03  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/55712
+	* config/i386/i386-c.c (ix86_target_macros_internal): Depending on
+	selected code model, define __code_mode_small__, __code_model_medium__,
+	__code_model_large__, __code_model_32__ or __code_model_kernel__.
+	* config/i386/cpuid.h (__cpuid, __cpuid_count) [__i386__]: Prefix
+	xchg temporary register with %k.  Declare temporary register as
+	early clobbered.
+	[__x86_64__]: For medium and large code models, preserve %rbx register.
+
 2013-01-03  Richard Biener  <rguenther@suse.de>
 
 	* tree-data-ref.c (dump_conflict_function): Use less vertical
diff --git a/gcc/config/i386/cpuid.h b/gcc/config/i386/cpuid.h
index 1f76d3a..7711c9b 100644
--- a/gcc/config/i386/cpuid.h
+++ b/gcc/config/i386/cpuid.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012
+ * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013
  * Free Software Foundation, Inc.
  *
  * This file is free software; you can redistribute it and/or modify it
@@ -136,35 +136,50 @@
 /* %ebx may be the PIC register.  */
 #if __GNUC__ >= 3
 #define __cpuid(level, a, b, c, d)			\
-  __asm__ ("xchg{l}\t{%%}ebx, %1\n\t"			\
+  __asm__ ("xchg{l}\t{%%}ebx, %k1\n\t"			\
 	   "cpuid\n\t"					\
-	   "xchg{l}\t{%%}ebx, %1\n\t"			\
-	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   "xchg{l}\t{%%}ebx, %k1\n\t"			\
+	   : "=a" (a), "=&r" (b), "=c" (c), "=d" (d)	\
 	   : "0" (level))
 
 #define __cpuid_count(level, count, a, b, c, d)		\
-  __asm__ ("xchg{l}\t{%%}ebx, %1\n\t"			\
+  __asm__ ("xchg{l}\t{%%}ebx, %k1\n\t"			\
 	   "cpuid\n\t"					\
-	   "xchg{l}\t{%%}ebx, %1\n\t"			\
-	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   "xchg{l}\t{%%}ebx, %k1\n\t"			\
+	   : "=a" (a), "=&r" (b), "=c" (c), "=d" (d)	\
 	   : "0" (level), "2" (count))
 #else
 /* Host GCCs older than 3.0 weren't supporting Intel asm syntax
    nor alternatives in i386 code.  */
 #define __cpuid(level, a, b, c, d)			\
-  __asm__ ("xchgl\t%%ebx, %1\n\t"			\
+  __asm__ ("xchgl\t%%ebx, %k1\n\t"			\
 	   "cpuid\n\t"					\
-	   "xchgl\t%%ebx, %1\n\t"			\
-	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   "xchgl\t%%ebx, %k1\n\t"			\
+	   : "=a" (a), "=&r" (b), "=c" (c), "=d" (d)	\
 	   : "0" (level))
 
 #define __cpuid_count(level, count, a, b, c, d)		\
-  __asm__ ("xchgl\t%%ebx, %1\n\t"			\
+  __asm__ ("xchgl\t%%ebx, %k1\n\t"			\
 	   "cpuid\n\t"					\
-	   "xchgl\t%%ebx, %1\n\t"			\
-	   : "=a" (a), "=r" (b), "=c" (c), "=d" (d)	\
+	   "xchgl\t%%ebx, %k1\n\t"			\
+	   : "=a" (a), "=&r" (b), "=c" (c), "=d" (d)	\
 	   : "0" (level), "2" (count))
 #endif
+#elif defined(__x86_64__) && (defined(__code_model_medium__) || defined(__code_model_large__)) && defined(__PIC__)
+/* %rbx may be the PIC register.  */
+#define __cpuid(level, a, b, c, d)			\
+  __asm__ ("xchg{q}\t{%%}rbx, %q1\n\t"			\
+	   "cpuid\n\t"					\
+	   "xchg{q}\t{%%}rbx, %q1\n\t"			\
+	   : "=a" (a), "=&r" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level))
+
+#define __cpuid_count(level, count, a, b, c, d)		\
+  __asm__ ("xchg{q}\t{%%}rbx, %q1\n\t"			\
+	   "cpuid\n\t"					\
+	   "xchg{q}\t{%%}rbx, %q1\n\t"			\
+	   : "=a" (a), "=&r" (b), "=c" (c), "=d" (d)	\
+	   : "0" (level), "2" (count))
 #else
 #define __cpuid(level, a, b, c, d)			\
   __asm__ ("cpuid\n\t"					\
diff --git a/gcc/config/i386/i386-c.c b/gcc/config/i386/i386-c.c
index 22e5e9b..05a3476 100644
--- a/gcc/config/i386/i386-c.c
+++ b/gcc/config/i386/i386-c.c
@@ -1,5 +1,5 @@
 /* Subroutines used for macro/preprocessor support on the ia-32.
-   Copyright (C) 2008, 2009, 2010, 2011, 2012
+   Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -243,6 +243,30 @@ ix86_target_macros_internal (HOST_WIDE_INT isa_flag,
       break;
     }
 
+  switch (ix86_cmodel)
+    {
+    case CM_SMALL:
+    case CM_SMALL_PIC:
+      def_or_undef (parse_in, "__code_model_small__");
+      break;
+    case CM_MEDIUM:
+    case CM_MEDIUM_PIC:
+      def_or_undef (parse_in, "__code_model_medium__");
+      break;
+    case CM_LARGE:
+    case CM_LARGE_PIC:
+      def_or_undef (parse_in, "__code_model_large__");
+      break;
+    case CM_32:
+      def_or_undef (parse_in, "__code_model_32__");
+      break;
+    case CM_KERNEL:
+      def_or_undef (parse_in, "__code_model_kernel__");
+      break;
+    default:
+      ;
+    }
+
   if (isa_flag & OPTION_MASK_ISA_MMX)
     def_or_undef (parse_in, "__MMX__");
   if (isa_flag & OPTION_MASK_ISA_3DNOW)