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From: "jgreenhalgh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/58553] New: New fail in PASS->FAIL: gcc.c-torture/execute/memcpy-2.c execution on arm and aarch64
Date: Fri, 27 Sep 2013 16:44:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58553

            Bug ID: 58553
           Summary: New fail in PASS->FAIL:
                    gcc.c-torture/execute/memcpy-2.c execution on arm and
                    aarch64
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jgreenhalgh at gcc dot gnu.org

Created attachment 30917
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30917&action=edit
Preprocessed source

Jeff's change to the Jump-Threading code here:
http://gcc.gnu.org/ml/gcc-patches/2013-09/msg01910.html

Introduced a regression for arm and aarch64 in 
gcc.c-torture/execute/memcpy-2.c, such that I now see:

 *** EXIT code
 emu: host signal 0

When executing the testcase on a model with command line:

/work/gcc-clean/build-arm-none-eabi/install/bin/arm-none-eabi-gcc
-B/work/gcc-clean/build-arm-none-eabi/obj/gcc2/gcc/
/work/gcc-clean/src/gcc/gcc/testsuite/gcc.c-torture/execute/memcpy-2.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -w -O3 -g
-Wa,-mno-warn-deprecated -lm -marm -march=armv7-a -mfpu=vfpv3-d16
-mfloat-abi=softfp -o
/work/gcc-clean/build-arm-none-eabi/obj/gcc2/gcc/testsuite/gcc/memcpy-2.x
-save-temps

I've attached the preprocessed source and the output from
-fdump-tree-dom1-details