x86: Set optimize to INT_MAX for -Os

Set optimize to INT_MAX, instead of -1, for -Os so that -Os will include
-O2 optimization.

	PR gas/24353
	* config/tc-i386.c (md_parse_option): Set optimize to INT_MAX
	for -Os.
	* testsuite/gas/i386/optimize-2.s: Add a test.
	* testsuite/gas/i386/x86-64-optimize-3.s: Likewise.
	* testsuite/gas/i386/optimize-2.d: Updated.
	* testsuite/gas/i386/x86-64-optimize-3.d: Likewise.

gas/ChangeLog

@@ -1,3 +1,15 @@
+2019-03-17  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR gas/24353
+	* config/tc-i386.c: Include <limits.h> if it exists and try
+	including <sys/param.h> if we have it.
+	(INT_MAX): Define if not defined.
+	(md_parse_option): Set optimize to INT_MAX for -Os.
+	* testsuite/gas/i386/optimize-2.s: Add a test.
+	* testsuite/gas/i386/x86-64-optimize-3.s: Likewise.
+	* testsuite/gas/i386/optimize-2.d: Updated.
+	* testsuite/gas/i386/x86-64-optimize-3.d: Likewise.
+
 2019-03-17  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR gas/24352

gas/config/tc-i386.c

@@ -33,6 +33,17 @@
 #include "elf/x86-64.h"
 #include "opcodes/i386-init.h"
 
+#ifdef HAVE_LIMITS_H
+#include <limits.h>
+#else
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+#ifndef INT_MAX
+#define INT_MAX (int) (((unsigned) (-1)) >> 1)
+#endif
+#endif
+
 #ifndef REGISTER_WARNINGS
 #define REGISTER_WARNINGS 1
 #endif
@@ -11350,7 +11361,7 @@ md_parse_option (int c, const char *arg)
 	{
 	  optimize_for_space = 1;
 	  /* Turn on all encoding optimizations.  */
-	  optimize = -1;
+	  optimize = INT_MAX;
 	}
       else
 	{

gas/testsuite/gas/i386/optimize-2.d

@@ -16,4 +16,5 @@ Disassembly of section .text:
  +[a-f0-9]+:	f6 c3 7f             	test   \$0x7f,%bl
  +[a-f0-9]+:	f7 c7 7f 00 00 00    	test   \$0x7f,%edi
  +[a-f0-9]+:	66 f7 c7 7f 00       	test   \$0x7f,%di
+ +[a-f0-9]+:	c5 f1 55 e9          	vandnpd %xmm1,%xmm1,%xmm5
 #pass

gas/testsuite/gas/i386/optimize-2.s

@@ -11,3 +11,5 @@ _start:
 	test	$0x7f, %bl
 	test	$0x7f, %edi
 	test	$0x7f, %di
+
+	vandnpd	%zmm1, %zmm1, %zmm5

gas/testsuite/gas/i386/x86-64-optimize-3.d

@@ -24,4 +24,5 @@ Disassembly of section .text:
  +[a-f0-9]+:	41 f6 c1 7f          	test   \$0x7f,%r9b
  +[a-f0-9]+:	41 f6 c1 7f          	test   \$0x7f,%r9b
  +[a-f0-9]+:	41 f6 c1 7f          	test   \$0x7f,%r9b
+ +[a-f0-9]+:	c5 f1 55 e9          	vandnpd %xmm1,%xmm1,%xmm5
 #pass

gas/testsuite/gas/i386/x86-64-optimize-3.s

@@ -19,3 +19,5 @@ _start:
 	test	$0x7f, %r9d
 	test	$0x7f, %r9w
 	test	$0x7f, %r9b
+
+	vandnpd	%zmm1, %zmm1, %zmm5