On 10/01/14 16:36, Segher Boessenkool wrote:
On Sat, Sep 27, 2014 at 05:03:26PM -0500, Segher Boessenkool wrote:
I've tried to make a stable future-proof testcase that does such a three-insn
combination. Not easy at all.
Turns out it is quite easy (when you've seen the solution, anyway :-P )
Tested on powerpc64-linux as before, and bootstrapped + regression checked
on x86_64-linux. Also checked the testcase fails before on i386 and x86_64,
and works afterwards.
Does this look good?
Segher
2014-10-02 Segher Boessenkool <seg...@kernel.crashing.org>
gcc/
PR rtl-optimization/62151
* combine.c (can_combine_p): Allow the destination register of INSN
to be clobbered in I3.
(subst): Do not substitute into clobbers of registers.
gcc/testsuite/
* gcc.dg/combine-clobber.c: New.
Excellent. Thanks. Even more so for making the test for x86 since
that's the platform that gets tested the most often.
Ok for the trunk.
jeff
