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[PATCH, i386]: Prevent SImode subregs of stack pointer in addresses

From: Uros Bizjak <ubizjak at gmail dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: "H.J. Lu" <hjl dot tools at gmail dot com>
Date: Wed, 1 Aug 2012 14:07:28 +0200
Subject: [PATCH, i386]: Prevent SImode subregs of stack pointer in addresses

Hello!

For some reason simplify_subreg does not like stack pointer. We call
simplify_subreg when printing address operands, so we have to prevent
SImode subregs of stack pointers from going into the address.

2012-08-01  Uros Bizjak  <ubizjak@gmail.com>

	* config/i386/i386.c (ix86_address_subreg_operand): Reject
	stack pointer.
	(ix86_print_operand_address): Assert that parts.base and parts.index
	are non-NULL after call to simplify_subreg.

Tested on x86_64-pc-linux-gnu {,-m32} and committed to mainline SVN.
The patch will be backported to 4.7 branch.

Uros.

Attachment: p.diff.txt
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