[Bug target/56455] New: [4.8 Regression on AVR] ICE in final_scan_insn
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56455 Bug #: 56455 Summary: [4.8 Regression on AVR] ICE in final_scan_insn Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassig...@gcc.gnu.org ReportedBy: vishnu@atmel.com AVR target built with specs: COLLECT_GCC=/home/vishnu.k_s/builds/build-linux_x86_64/install/bin/avr-gcc COLLECT_LTO_WRAPPER=/home/vishnu.k_s/builds/build-linux_x86_64/install/bin/../libexec/gcc/avr/4.8.0/lto-wrapper Target: avr Configured with: ../gcc-trunk/configure --prefix=/home/vishnu.k_s/builds/build-linux_x86_64//install --target=avr --enable-languages=c,c++ --disable-nls --with-gmp=/proj/install/gmp-4.3.2/ --with-mpfr=/proj/install/mpfr-2.4.2/ --with- mpc=/proj/install/mpc-0.8.2/ Thread model: single gcc version 4.8.0 20130116 (experimental) (GCC) Above compiler gives an ICE in final_scan_insn, at final.c for testcases present in gcc.dg/tree-ssa/pr36881.c, gcc.dg/pr45259.c and gcc.c-torture/compile/981006-1.c. Output for pr36881.c - /home/vishnu.k_s/builds/build-linux_x86_64/gcc-trunk/gcc/testsuite/gcc.dg/tree-ssa/pr36881.c: In function 'foo': /home/vishnu.k_s/builds/build-linux_x86_64/gcc-trunk/gcc/testsuite/gcc.dg/tree-ssa/pr36881.c:22:1: internal compiler error: in final_scan_insn, at final.c:2460 Output for pr45259.c /home/vishnu.k_s/builds/build-linux_x86_64/gcc-trunk/gcc/testsuite/gcc.dg/pr45259.c: In function 'foo': /home/vishnu.k_s/builds/build-linux_x86_64/gcc-trunk/gcc/testsuite/gcc.dg/pr45259.c:43:1: internal compiler error: in final_scan_insn, at final.c:2460 Output for 981006-1.c - /home/vishnu.k_s/builds/build-linux_x86_64/gcc-trunk/gcc/testsuite/gcc.c-torture/compile/981006-1.c: In function 'foo': /home/vishnu.k_s/builds/build-linux_x86_64/gcc-trunk/gcc/testsuite/gcc.c-torture/compile/981006-1.c:49:1: internal compiler error: in final_scan_insn, at final.c:2460
[Bug target/56833] New: [4.9 Regression] Valid register is over written by reload pass
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56833 Bug #: 56833 Summary: [4.9 Regression] Valid register is over written by reload pass Classification: Unclassified Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target AssignedTo: unassig...@gcc.gnu.org ReportedBy: vishnu@atmel.com AVR target built with specs: Using built-in specs. COLLECT_GCC=/home/vishnu.k_s/build-linux_x86_64/bldcc/gcc/xgcc Target: avr Configured with: ../gcc-trunk/configure --prefix=/home/vishnu.k_s/build-linux_x86_64//install --target=avr --enable-languages=c,c++ --disable-nls --with-gmp=/proj/install/gmp-4.3.2/ --with-mpfr=/proj/install/mpfr-2.4.2/ --with-mpc=/proj/install/mpc-0.8.2/ Thread model: single gcc version 4.9.0 20130326 (experimental) (GCC) Above compiler generate wrong code for testcase present in gcc.c-torture/execute/simd-1.c. gcc options : -O1 -mmcu=atmega1280 (snip of assembly) ldi r30,lo8(res); r30/r31 is loaded with address of res ldi r31,hi8(res); st Z,r24 ldd r31,Y+1 ;Modifying r31 register sts res+1,r31 sts res+2,r27 sts res+3,r26 sts res+4,r23 ... lds r22,res+4+2 lds r23,res+4+3 ld r24,Z ; regsiter pair r30/r31 is used to load from res ldd r25,Z+1 ldd r26,Z+2 ldd r27,Z+3 (snip of assembly) It looks like r31 is corrupted after reload pass.
[Bug other/56833] [4.9 Regression] Valid register is over written by reload pass
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56833 vishnu ks changed: What|Removed |Added Component|target |other --- Comment #1 from vishnu ks 2013-04-03 12:50:55 UTC --- This bug might be similar to PR56442, which is not reproducible in 4.9. conversation in mailing list : http://gcc.gnu.org/ml/gcc/2013-03/msg00121.html
