[Bug tree-optimization/39604] [4.3/4.4/4.5 Regression] tree-ssa-sink breaks stack layout

[dougkwan at google dot com]

------- Comment #12 from dougkwan at google dot com  2009-05-10 00:56 -------
Created an attachment (id=17840)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17840&action=view)
C test-case for the same problem on x86_64 and i386.

The original C++ test-case does not crash on x86_64 and i386.  I compared the
generated code and found that ARM EABI requires constructors to return values. 
That is not common and certainly is not the case on x86_64 and i386.  So gcc
generates very different code on both targert very early on.  The C test-case
was created based on the lowered C++ code in the middle-end.  It crashes with
just -O2 on x86_64 with both 4.3.1 and 4.4.0; it crashes on i386 similarly with
4.3.1.  I did not test 4.4.0 on i386.

Unfortunately this does not crash on ARM.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39604