[Bug target/36336] ICE push_reload - psuedo reg_equiv_constant

["hutchinsonandy at aim dot com" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #5 from hutchinsonandy at aim dot com  2008-06-06 20:18 -------
Subject: Re:  ICE push_reload - psuedo reg_equiv_constant


The patch for

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31786

removes one problematic part of LEGITIMIZE_RELOAD_ADDRESS. This is  
applied to WinAVR 20080512 (patched 4.3.0). But is still waiting for 
approval on avr-gcc 4.3/4.4 HEAD.

Even with that patch, the other parts of L_R_A are bad and need fixing 
with added check of reg_equivalent_constant.
So if register is equivalent constant LEGITIMIZE_RELOAD_ADDRESS should 
do nothing.

The assert that triggers is an explicit check for this.

I have not posted patch due to overlap with pending patch.

BTW gcc list has short discussion on this bug, including explanation 
for the AVR code.

Andy




----------------------------------------------
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-----Original Message-----
From: eric dot weddington at atmel dot com <gcc-bugzilla@gcc.gnu.org>
To: hutchinsonandy@aim.com
Sent: Fri, 6 Jun 2008 3:48 pm
Subject: [Bug target/36336] ICE push_reload - psuedo reg_equiv_constant




------- Comment #4 from eric dot weddington at atmel dot com  
2008-06-06 19:48
-------
Test case passes with -O[0123s], with WinAVR 20080512 (patched 4.3.0).


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