Launchpad has imported 5 comments from the remote bug at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49335.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2011-06-08T22:25:27+00:00 Michael Hope wrote: Created attachment 24468 Reduced test case The attached testcase is derived from codeblocks 10.05 and fails to build on ARM due to generating invalid assembler. To reproduce: michaelh@ursa2:~/linaro/bugs$ ~/linaro/toolchains/gcc-4.7~svn174795 -armv7l-maverick-cbuild127-ursa3-cortexa9r1/bin/g++ -c -O2 -save-temps lp791327.cpp lp791327.s: Assembler messages: lp791327.s:76: Error: r13 not allowed here -- `rsb r0,sp,r0,lsl#2' The fault occurs in 4.6.0 and current trunk. It does not occur in 4.5.3. Originally reported at https://bugs.launchpad.net/ubuntu/+source/codeblocks/+bug/791327 Reply at: https://bugs.launchpad.net/gcc/+bug/791327/comments/3 ------------------------------------------------------------------------ On 2011-06-08T22:33:32+00:00 Michael Hope wrote: Forgot the configuration: Configured with: '../../gcc-4.7~/configure' --prefix='/scratch/cbuild/slave/slaves/ursa3/gcc-4.7~svn174795/gcc/default/install' --enable-languages=c,c++,objc,obj-c++,fortran,lto --with-mode=thumb --with-arch=armv7-a --with-tune=cortex-a9 --with-float=softfp --with-fpu=neon Thread model: posix gcc version 4.7.0 20110608 (experimental) [trunk revision 174795] (GCC) michaelh@ursa2:~/linaro/bugs$ as -v GNU assembler version 2.20.51 (arm-linux-gnueabi) using BFD version (GNU Binutils for Ubuntu) 2.20.51-system.20100908 michaelh@ursa2:~/linaro/bugs$ uname -a Linux ursa2 2.6.35.3-cbuild2+ #8 SMP Mon Apr 4 12:46:46 NZST 2011 armv7l GNU/Linux michaelh@ursa2:~/linaro/bugs$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 10.10 Release: 10.10 Codename: maverick The fault also occurs at -O1 and -O3 but not at -O0. The assembly in the region is: .L33: movs r1, #0 movs r2, #64 mov r0, sp mov r9, sp bl memset cmp r4, #4 beq .L11 add r0, r8, r4, lsl #2 rsb r6, r8, #4 lsls r6, r6, #2 rsb r1, r4, #4 rsb r0, sp, r0, lsl #2 mov r4, sp mov lr, #0 which matches the final lines of the function. It looks like the code should be using r9 instead of sp. Reply at: https://bugs.launchpad.net/gcc/+bug/791327/comments/4 ------------------------------------------------------------------------ On 2011-06-09T10:23:41+00:00 Ramana-gcc wrote: The problem is that *arith_shiftsi allows *all* shiftable operators to have the stack pointer as Rn . In Thumb2 only the add and sub instructions are allowed to have the stack pointer in this form and all other instructions are UNPREDICTABLE. This has come as a result of merging the 2 patterns from ARM and Thumb2 into a single pattern and considering the same for both. Affects only 4.6 branch and FSF trunk. cheers Ramana Reply at: https://bugs.launchpad.net/gcc/+bug/791327/comments/7 ------------------------------------------------------------------------ On 2011-06-09T10:25:15+00:00 Ramana-gcc wrote: (In reply to comment #2) > The problem is that *arith_shiftsi allows *all* shiftable operators to have > the > stack pointer as Rn . > > In Thumb2 only the add and sub instructions are allowed to have the stack > pointer in this form and all other instructions are UNPREDICTABLE. This is for operations of the form : <operation> rd, rn, rm lsl 2 cheers Ramana Reply at: https://bugs.launchpad.net/gcc/+bug/791327/comments/8 ------------------------------------------------------------------------ On 2011-06-16T01:31:43+00:00 Michael Hope wrote: Also affects gimp. See LP: #791279. Doesn't appear in trunk r172224 but does in r174795. Reply at: https://bugs.launchpad.net/gcc/+bug/791327/comments/9 ** Changed in: gcc Status: Unknown => Confirmed ** Changed in: gcc Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/791327 Title: codeblocks version 10.05-2 failed to build on armel To manage notifications about this bug go to: https://bugs.launchpad.net/gcc/+bug/791327/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
