[Bug rtl-optimization/69238] New: [4.9/5/6 Regression] gcc.dg/vect/vect-multitypes-1.c FAILs with -O2 -fno-dce -fno-forward-propagate -fno-rerun-cse-after-loop -funroll-loops
zsojka at seznam dot cz
gcc-bugzilla@gcc.gnu.org
Tue Jan 12 11:41:00 GMT 2016
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69238
Bug ID: 69238
Summary: [4.9/5/6 Regression] gcc.dg/vect/vect-multitypes-1.c
FAILs with -O2 -fno-dce -fno-forward-propagate
-fno-rerun-cse-after-loop -funroll-loops
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: powerpc-unknown-linux-gnu
Created attachment 37311
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37311&action=edit
reduced testcase
4.7 - trunk FAILs @ powerpc64
4.8 - trunk FAILs @ powerpc
4.9 FAILs @ i686
Output (qemu userspace emulation):
$ powerpc-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-powerpc/bin/powerpc-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-232261-checking-yes-rtl-df-nographite-powerpc/bin/../libexec/gcc/powerpc-unknown-linux-gnu/6.0.0/lto-wrapper
Target: powerpc-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=powerpc-unknown-linux-gnu
--with-ld=/usr/bin/powerpc-unknown-linux-gnu-ld
--with-as=/usr/bin/powerpc-unknown-linux-gnu-as
--with-sysroot=/usr/powerpc-unknown-linux-gnu --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-232261-checking-yes-rtl-df-nographite-powerpc
Thread model: posix
gcc version 6.0.0 20160112 (experimental) (GCC)
$ powerpc-unknown-linux-gnu-gcc -O2 -fno-dce -fno-forward-propagate
-fno-rerun-cse-after-loop -funroll-loops testcase.c
$ ./a.out
Invalid data memory access: 0x00000000
NIP 10000e08 LR 10000a40 CTR 00000003 XER 00000000 CPU#0
MSR 00006040 HID0 00000000 HF 00006000 idx 0
TB 00002617 11241216437041
GPR00 0000000000000000 00000000f6ffe7a0 00000000100ba4c0 0000000000000000
GPR04 0000000000000000 0000000000000000 00000000100b1fbe 0000000000000000
GPR08 00000000100b200c 00000000100b1fbe 00000000100b1f4c 0000000000000000
GPR12 0000000000000000 00000000100b8df8 0000000000000000 0000000000000000
GPR16 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR20 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR24 00000000100b1fc0 0000000000000000 0000000000000000 0000000000000000
GPR28 00000000100b1f4c 00000000100b1ee0 00000000100b200c 0000000000000000
CR 42000048 [ G E - - - - G L ] RES ffffffff
FPR00 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR04 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR08 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR12 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR16 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR20 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR24 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPR28 0000000000000000 0000000000000000 0000000000000000 0000000000000000
FPSCR 00000000
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation fault
(gdb) disassemble
...
0x0000000010001288 <+392>: sth r25,4(r5)
0x000000001000128c <+396>: lhzu r29,10(r30)
0x0000000010001290 <+400>: lwz r30,20(r23)
=> 0x0000000010001294 <+404>: lhz r23,0(r3)
0x0000000010001298 <+408>: cmpld cr7,r9,r11
0x000000001000129c <+412>: lhzu r31,12(r4)
0x00000000100012a0 <+416>: addi r6,r10,4
...
(gdb) info reg
...
r3 0x0 0
...
r3 doesn't seem to ever hold a valid address (contrary to PR69195), so it
shouldn't be used as a base register.
Tested revisions:
trunk r232261 - FAIL (powerpc, powerpc64)
5-branch r232044 - FAIL (powerpc, powerpc64)
4_9-branch r232043 - FAIL (powerpc, powerpc64, i686)
4_8-branch r224828 - FAIL (powerpc, powerpc64)
4_7-branch r211571 - FAIL (powerpc64)
4_6-branch r197894 - OK
4_5-branch r189152 - OK
4_4-branch r185318 - OK
More information about the Gcc-bugs
mailing list