Compiling stress-vecwide.i with -O1 -g results in an ICE:

during RTL pass: expand
stress-vecwide.c: In function 'stress_vecwide_256.avx.30':
stress-vecwide.c:127:185: internal compiler error: in expand_debug_locations, at cfgexpand.c:5410
 STRESS_VECWIDE(stress_vecwide_256, stress_vint8w256_t) 

This causes the stress-ng package to fail to build on RHEL 8.10.

Seen with gcc-8.5.0-18.3.el8_8.x86_64, gcc-8.5.0-23.el8_10.x86_64, gcc-8.5.0-10.el8.x86_64. Last successful build in Brew was with gcc-8.5.0-17.el8.x86_64, so I'm not sure if  this is a regression.