This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
Following the message (http://gcc.gnu.org/ml/gcc/2004-06/msg00472.html) regarding exploiting dual mode operations, I enclose the complete implementation of the algorithm. Also enclosed some testcases that shows the advantages of this optimization. In these testcases, you can see that the redundant sign-extension instructions are eliminated, and the non redundant ones are moved to their optimal placement. Performance result for SPEC2000 on powerpc64-suse-linux (POWER4): - There is no regression on SPEC2000 benchmarks on 64-bit platform. (This means that this optimization didn't cause a compilation error or a miscompare to any of the benchmarks that passed successfully without the optimization.) - There was no significant degredation in performance for all the benchmarks that passed! - The greatest improvement of 1.75% was achieved for 186.crafty and 188.ammp and about 1% for 256.bzip2. Regression tests on SPEC2000 on powerpc64-suse-linux (POWER4): 1. c99_classification_macros_c.cc: was previously an unexpected success and with the optimization enabled it became expected failure. 2. intrinsic_sum.f90: Fails during compilation. It is possible that it exposes a bug somewhere else, I'm still working on it. 3. There was no change for the rest of the tests. Comments are welcomed, Leehod.
Attachment:
see.c
Description: Binary data
Attachment:
see_patch_22_6
Description: Binary data
Attachment:
Changelog
Description: Binary data
Attachment:
testcase-simple-loop2.c
Description: Binary data
Attachment:
testcase-simple-loop1.c
Description: Binary data
Attachment:
testcase-shift.c
Description: Binary data
Attachment:
testcase-if.c
Description: Binary data
Attachment:
testcase-cse_gcse_move_se.c
Description: Binary data
Attachment:
testcase-compare-long.c
Description: Binary data
Attachment:
testcase-branch.c
Description: Binary data
Attachment:
testcase-add-long.c
Description: Binary data
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |