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[Bug target/49335] [4.6 Regression] ARM: Invalid assembler generated while compiling C++ code from 'codeblocks'
- From: "ramana at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 9 Jun 2011 10:25:16 +0000
- Subject: [Bug target/49335] [4.6 Regression] ARM: Invalid assembler generated while compiling C++ code from 'codeblocks'
- Auto-submitted: auto-generated
- References: <bug-49335-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49335
--- Comment #3 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2011-06-09 10:25:15 UTC ---
(In reply to comment #2)
> The problem is that *arith_shiftsi allows *all* shiftable operators to have the
> stack pointer as Rn .
>
> In Thumb2 only the add and sub instructions are allowed to have the stack
> pointer in this form and all other instructions are UNPREDICTABLE.
This is for operations of the form :
<operation> rd, rn, rm lsl 2
cheers
Ramana