https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91518
--- Comment #3 from Xiong Hu XS Luo <luoxhu at cn dot ibm.com> --- (In reply to Richard Biener from comment #2) > Not seen on x86_64. Given you bisected to r263875 it should appear with GCC > 9 as well - are the actual GCC 9 releases also affected? > > I assume this is ppc64le. > > Unless we know more I assume this is a target issue. Please build with debug > info and see where exactly and why it segfaults. Yes. It still fails on both power8 and power9 even on GCC 10 (gcc version 10.0.0 20190823 (experimental) (GCC)). Reset to r263875, the register content shown as below, Wrong address filled for lwzx instruction ($r8 is expected to be a valid address value): 140│ 0x00000000101a5718 <+552>: ld r12,888(r31) 141│ 0x00000000101a571c <+556>: ld r0,856(r31) 142│ 0x00000000101a5720 <+560>: ld r17,880(r31) 143│ 0x00000000101a5724 <+564>: ld r8,848(r31) 144│ 0x00000000101a5728 <+568>: addi r21,r21,1 145│ 0x00000000101a572c <+572>: cmpw cr7,r21,r30 146│ 0x00000000101a5730 <+576>: mulld r4,r3,r12 147│ 0x00000000101a5734 <+580>: add r18,r4,r0 148│ 0x00000000101a5738 <+584>: mulld r11,r18,r17 149├> 0x00000000101a573c <+588>: lwzx r3,r8,r11 44: /x $r3 = 0x1 45: /x $r8 = 0x77 46: /x $r11 = 0x1770 47: /x $r18 = 0x7d 48: /x $r17 = 0x30 49: /x $r4 = 0x1 50: /x $r0 = 0x7c 51: /x $r3 = 0x1 52: /x $r12 = 0x1 53: /x $r21 = 0x2 54: /x $r8 = 0x77 55: /x $r17 = 0x30 56: /x $r0 = 0x7c 57: /x $r12 = 0x1 I am not sure whether this is the debug info you needed? function callstack is already pasted in #c0, as source code is not allowed to be pasted, the segment fault place is in line 9375 of file mol.fppized.f90 of function make_image_of_shell. Thanks.
