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Re: [PATCH] Fix PR57451 (Incorrect debug ranges emitted for -freorder-blocks-and-partition -g)


On Mon, 2013-08-19 at 22:21 -0700, Teresa Johnson wrote:

> 2013-08-19  Teresa Johnson  <tejohnson@google.com>
> 
>         PR rtl-optimizations/57451
>         * final.c (reemit_insn_block_notes): Prevent lexical blocks
>         from crossing split section boundaries.
> 
>         * testsuite/g++.dg/tree-prof/pr57451.C: New test.

Teresa,

This patch is causing a problem in my mips compiler.  I am creating a
cross-toolchain running on x86 targeting mips-mti-linux-gnu and if I
compile glibc using a GCC that has this patch all of the programs I
compile go into an infinite loop when run under the qemu simulator.  I
think it is the dynamic linker that is getting miscompiled, but I
haven't tracked down the exact nature of the miscompilation yet.  Has
anyone else reported any problems with it?  I am adding Richard
Sandiford to the email list since he is a mips expert and also might
have some insight to using next_active_insn vs. next_real_insn vs.
next_insn, though it doesn't look like you have changed what is used
here.

Steve Ellcey
sellcey@mips.com



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