c++/197: Re: C++ bug in asm() statements

Tue May 9 12:16:00 GMT 2000

	Note: There was a bad value `ice-in-legal-code' for the field `>Class:'.
	It was set to the default value of `sw-bug'.

>Number:         197
>Category:       c++
>Synopsis:       C++ bug in asm() statements
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          analyzed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 09 12:16:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Dave McWherter <davemcw@home.com>
>Release:        2.95.2
>Organization:
>Environment:
>Description:
 Original-Message-Id: <4.2.2.20000509085536.00da1dd0@mail>
 Date: Tue, 09 May 2000 08:57:16 -0400

 The GCC version - 2.95.2
 The system type - Windows NT 4.0
 All options you passed to the compiler - none
 Preprocessed output of the source file that caused the compiler error, even
 if the source code can be downloaded from elsewhere - see below

 Calling a member function from an asm() statement causes a compiler crash.
 build_component_ref() seems to build the COMPONENT_REF incorrectly - the
 second operand is incorrect (I think). So later when the asm ops are
 expanded, the calculation of 'size_tree' in get_inner_reference() produces
 a garbage tree node and a subsequent crash when 'size_tree' is referenced.

 The problem does not occur in versions 2.91.66 and lower.

 Dave McWherter
 dave@franklin.com

 # 1 "testasm.cpp"
 class myClass
 {

 public:
	 int	myMember(void);
	 void	call_it(void);
 };

 void
 myClass::call_it(void)
 {

	 asm (
		 "\t call    %0       \n"

		 :
		 : "m" (myMember)
	 );
 }

>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: