[Bug target/49799] gcc arm generates illegal sbfx instruction

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49799

Mikael Pettersson <mikpe at it dot uu.se> changed:

           What    |Removed                     |Added
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                 CC|                            |rearnsha at gcc dot gnu.org

--- Comment #2 from Mikael Pettersson <mikpe at it dot uu.se> 2011-07-21 12:53:19 UTC ---
It's triggered by:

Author: rearnsha
Date: Tue Jan 13 14:09:50 2009
New Revision: 143338

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143338
Log:
    * arm.c (struct processors): Pass for speed down into cost helper
    functions.
    (const_ok_for_op): Handle COMPARE and inequality nodes.
    (arm_rtx_costs_1): Rewrite.
    (arm_size_rtx_costs): Update prototype.
    (arm_rtx_costs): Pass speed down to helper functions.
    (arm_slowmul_rtx_costs): Rework cost calculations.
    (arm_fastmul_rtx_costs, arm_xscale_rtx_costs): Likewise.
    (arm_9e_rtx_costs): Likewise.

It looks like the cost tweaks exposed a pre-existing bug.