middle-end/5345: ICE when using the "+m" constraint with built-in assembly

[zap@cobra.ru]

>Number:         5345
>Category:       middle-end
>Synopsis:       ICE when using the "+m" constraint with built-in assembly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Thu Jan 10 02:06:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Andrew Zabolotny
>Release:        3.0.2
>Organization:
>Environment:
gcc 3.0.2 on OS/2, also tried and `works' with gcc 2.96 on Linux
>Description:
I've used for a long time ago a quick sqrt() routine for the x86 processor, which cheased to compile with gcc 3.0.x series.

Trying to find what happens and how it could be corrected I have encountered an inexplicable ICE.

The routine uses built-in assembly, which references a `float ' variable by memory address, both for input and output (the "+m" constraint). The variable itself is an argument to the function. When I try to compile it, I get: "output number 1 not directly addressable". Then I tried to add an printf() which would print the address of that variable... I got an ICE.

I've attached the .cpp file, since it includes just stdio.h (for printf) - I don't think the preprocessed file matters, while you will (possibly) be unable to compile it on other platforms.
>How-To-Repeat:
gcc -c gcc-ice.cpp
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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