cygming.h (DWARF2_DEBUGGING_INFO): Enable by default for 64-bit.

gcc/
	* config/i386/cygming.h (DWARF2_DEBUGGING_INFO): Enable by
	default for 64-bit.
	(PREFERRED_DEBUGGING_TYPE): Prefer dwarf2 for 64-bit.
	(TARGET_64BIT_MS_ABI): New.
	(DBX_REGISTER_NUMBER): Handle 64-bit.
	(SIZE_TYPE, PTRDIFF_TYPE): Use long long for 64-bit.
	(LONG_TYPE_SIZE): Force to 32.
	(REG_PARM_STACK_SPACE): New.
	(OUTGOING_REG_PARM_STACK_SPACE): New.
	(REGPARM_MAX, SSE_REGPARM_MAX): New.
	(HANDLE_PRAGMA_PUSH_POP_MACRO): New.
	(STACK_BOUNDARY): Use 128 for 64-bit.
	* config/i386/cygwin.asm: Use push/ret to preserve call stack.
	Add 64-bit implementation.
	* config/i386/gthr-win32.c (__gthr_win32_key_create): Mark dtor
	argument unused.
	* config/i386/i386.c (x86_64_ms_abi_int_parameter_registers): New.
	(override_options): Set ix86_cmodel for TARGET_64BIT_MS_ABI.
	Warn for -mregparm, -mrtd in 64-bit mode; force ix86_regparm
	for 64-bit; use TARGET_SUBTARGET64_DEFAULT.
	(ix86_handle_cconv_attribute): Don't warn when ignoring if
	TARGET_64BIT_MS_ABI.
	(ix86_function_arg_regno_p): Handle TARGET_64BIT_MS_ABI.
	(ix86_pass_by_reference): Likewise.
	(ix86_function_value_regno_p): Likewise.
	(ix86_build_builtin_va_list): Likewise.
	(ix86_va_start, ix86_gimplify_va_arg): Likewise.
	(function_arg_advance_ms_64): New.
	(function_arg_advance): Call it.
	(function_arg_ms_64): New.
	(function_arg): Call it.
	(function_value_ms_64): New.
	(ix86_function_value_1): Call it.
	(return_in_memory_ms_64): New.
	(ix86_return_in_memory): Call it.
	(setup_incoming_varargs_ms_64): New.
	(ix86_setup_incoming_varargs): Call it.
	(ix86_expand_prologue): Handle 64-bit stack probing.
	(legitimize_pic_address): Handle TARGET_64BIT_MS_ABI.
	(output_pic_addr_const): Likewise.
	(x86_this_parameter): Likewise.
	(x86_output_mi_thunk): Likewise.
	(x86_function_profiler): Likewise.
	(TARGET_STRICT_ARGUMENT_NAMING): New.
	* config/i386/i386.h (TARGET_SUBTARGET64_DEFAULT): New.
	(TARGET_64BIT_MS_ABI): New.
	(CONDITIONAL_REGISTER_USAGE): Handle TARGET_64BIT_MS_ABI.
	* config/i386/i386.md (allocate_stack_worker): Remove.
	(allocate_stack_worker_32): Rename from allocate_stack_worker_1;
	describe the clobber of eax without a match_scratch.
	(allocate_stack_worker_postreload): Remove.
	(allocate_stack_worker_64): Rename from allocate_stack_worker_rex64;
	describe the clobbers of rax, r10, r11 properly; use __chkstk symbol.
	(allocate_stack_worker_rex64_postreload): Remove.
	(allocate_stack): Handle 64-bit.
	* config/i386/i386elf (TARGET_SUBTARGET_DEFAULT): Remove.
	* config/i386/mingw32.h (TARGET_VERSION): Set correctly for 64-bit.
	(EXTRA_OS_CPP_BUILTINS): Handle 64-bit.
	(STANDARD_INCLUDE_DIR): Handle TARGET_64BIT_DEFAULT.
	(STANDARD_STARTFILE_PREFIX_1): Likewise.
	* config/i386/unix.h (TARGET_SUBTARGET64_DEFAULT): New.
	* config.build (x86_64-*-mingw*): New host.
	* config.host (x86_64-*-mingw*): New host.
	* config.gcc (x86_64-*-mingw*): New target.
	* gthr-win32.h (__gthread_key_create): Mark dtor unused.
libgcc/
	* config.host (x86_64-*-mingw*): New target.

Co-Authored-By: Kai Tietz <kai.tietz@onevision.com>

From-SVN: r123372

1 files changed, 55 insertions, 16 deletions

diff --git a/gcc/config/i386/cygwin.asm b/gcc/config/i386/cygwin.asm
index 5b656892d5f..371feae8864 100644
--- a/gcc/config/i386/cygwin.asm
+++ b/gcc/config/i386/cygwin.asm
@@ -42,27 +42,66 @@
 
 	.global ___chkstk
 	.global	__alloca
+#ifndef _WIN64
 ___chkstk:
 __alloca:
-	pushl  %ecx		/* save temp */
-	movl   %esp,%ecx	/* get sp */
-	addl   $0x8,%ecx	/* and point to return addr */
+	pushl	%ecx		/* save temp */
+	leal	8(%esp), %ecx	/* point past return addr */
+	cmpl	$0x1000, %eax	/* > 4k ?*/
+	jb	Ldone
 
-probe: 	cmpl   $0x1000,%eax	/* > 4k ?*/
-	jb    done		
+Lprobe:
+	subl	$0x1000, %ecx  		/* yes, move pointer down 4k*/
+	orl	$0x0, (%ecx)   		/* probe there */
+	subl	$0x1000, %eax  	 	/* decrement count */
+	cmpl	$0x1000, %eax
+	ja	Lprobe         	 	/* and do it again */
 
-	subl   $0x1000,%ecx  		/* yes, move pointer down 4k*/
-	orl    $0x0,(%ecx)   		/* probe there */
-	subl   $0x1000,%eax  	 	/* decrement count */
-	jmp    probe           	 	/* and do it again */
+Ldone:
+	subl	%eax, %ecx	   
+	orl	$0x0, (%ecx)	/* less than 4k, just peek here */
 
-done: 	subl   %eax,%ecx	   
-	orl    $0x0,(%ecx)	/* less that 4k, just peek here */
+	movl	%esp, %eax	/* save old stack pointer */
+	movl	%ecx, %esp	/* decrement stack */
+	movl	(%eax), %ecx	/* recover saved temp */
+	movl	4(%eax), %eax	/* recover return address */
 
-	movl   %esp,%eax
-	movl   %ecx,%esp	/* decrement stack */
+	/* Push the return value back.  Doing this instead of just
+	   jumping to %eax preserves the cached call-return stack
+	   used by most modern processors.  */
+	pushl	%eax
+	ret
+#else
+/* __alloca is a normal function call, which uses %rcx as the argument.  */
+__alloca:
+	movq	%rcx, %rax
+	/* FALLTHRU */
+
+/* ___chkstk is a *special* function call, which uses %rax as the argument.
+   We avoid clobbering the 4 integer argument registers, %rcx, %rdx, 
+   %r8 and %r9, which leaves us with %rax, %r10, and %r11 to use.  */
+___chkstk:
+	popq	%r11		/* pop return address */
+	movq	%rsp, %r10	/* get sp */
+	cmpq	$0x1000, %rax	/* > 4k ?*/
+	jb	Ldone
 
-	movl   (%eax),%ecx	/* recover saved temp */
-	movl   4(%eax),%eax	/* get return address */
-	jmp    *%eax	
+Lprobe:
+	subq	$0x1000, %r10  		/* yes, move pointer down 4k*/
+	orl	$0x0, (%r10)   		/* probe there */
+	subq	$0x1000, %rax  	 	/* decrement count */
+	cmpq	$0x1000, %rax
+	ja	Lprobe         	 	/* and do it again */
+
+Ldone:
+	subq	%rax, %r10
+	orl	$0x0, (%r10)	/* less than 4k, just peek here */
+	movq	%r10, %rsp	/* decrement stack */
+
+	/* Push the return value back.  Doing this instead of just
+	   jumping to %r11 preserves the cached call-return stack
+	   used by most modern processors.  */
+	pushq	%r11
+	ret
+#endif
 #endif