[aarch64-port-dev ] RFR: 88158361: AArch64: Address calculation missed optimizations

[Andrew Haley]

On 27/06/17 04:16, Zhongwei Yao wrote:
> [ I re-send this mail due to my attachment is too big and the previous mail
> is under approving. ]
> 
> It is strange, because I haven't seen such pattern locally.
> 
> Here is what I do (jdk is built as fastdebug based on latest master with my
> patch applied):
>   $java -XX:+PrintCompilation -XX:-TieredCompilation
> -XX:CompilerDirectivesFile=/tmp/compile_directive.txt ExtTest >
> func_ExtTest_20170627_10_41_56.log
> 
> log file is at
> http://cr.openjdk.java.net/~njian/8158361/func_ExtTest_20170627_10_41_56.log

I see this in tha file:

  0x0000ffff908fb7e4: stp	x29, x30, [sp,#16]  ;*synchronization entry
                                                ; - ExtTest$28::func at -1 (line 241)

  0x0000ffff908fb7e8: sbfx	w11, w2, #0, #30
  0x0000ffff908fb7ec: add	w0, w3, w11, lsl #1  ;*iadd {reexecute=0 rethrow=0 return_oop=0}
                                                ; - ExtTest$28::func at 8 (line 241)

  0x0000ffff908fb7f0: ldp	x29, x30, [sp,#16]

I think this is just a bad test case.  Please check all of the output.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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