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[patch] PR rtl-optimization/65220: avoid integer division in stack alignment

From: Aldy Hernandez <aldyh at redhat dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, Richard Henderson <rth at redhat dot com>
Cc: Jakub Jelinek <jakub at redhat dot com>
Date: Thu, 26 Feb 2015 17:46:48 -0800
Subject: [patch] PR rtl-optimization/65220: avoid integer division in stack alignment
Authentication-results: sourceware.org; auth=none

This is actually Jakub's patch from the PR, with a few minor tweaks thatwere needed to bootstrap and pass the regression suite.

The splitter was using operand 0 without setting it first. It should'vebeen operand 2. Also, there was a division by zero that was causing aninvalid insn; fixed by changing the INTVAL + 2 into INTVAL - 2.Finally, a reload_completed was added at Jakub's request.


Bootstrapped and tested on x86-64 Linux.

OK for mainline?

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