[AArch64/GCC][18/N] Optimize epilogue when there is no frame pointer

Thu, 24 Jul 2014 05:47:41 -0700 

Like [17/N], we do same optimization on epilogue for !frame_pointer_needed.
this is the last of this aarch64 stack patch set. 

  Improved testcases:

    
    gcc.target/aarch64/test_frame_1.c

    gcc.target/aarch64/test_frame_2.c
    gcc.target/aarch64/test_frame_4.c
    gcc.target/aarch64/test_frame_6.c
    gcc.target/aarch64/test_frame_7.c
    gcc.target/aarch64/test_frame_8.c
    gcc.target/aarch64/test_frame_10.c


ok for install?

thanks.

gcc/
  * config/aarch64/aarch64.c (aarch64_popwb_single_reg): New function.
  (aarch64_expand_epilogue): Optimize epilogue when !frame_pointer_needed.

gcc/testsuite/
  * gcc.target/aarch64/test_frame_1.c: Match optimized instruction sequences.
  * gcc.target/aarch64/test_frame_2.c: Likewise.
  * gcc.target/aarch64/test_frame_4.c: Likewise.
  * gcc.target/aarch64/test_frame_6.c: Likewise.
  * gcc.target/aarch64/test_frame_7.c: Likewise.
  * gcc.target/aarch64/test_frame_8.c: Likewise.
  * gcc.target/aarch64/test_frame_10.c: Likewise.
























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