https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65805
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
It is clearer to see the issue if one compiles the whole file with
-fno-lra-remat:
markus@x4 Release % g++ -S -fno-lra-remat -fPIC -fvisibility=hidden -pthread
-march=x86-64 -O2 -fno-exceptions -fno-rtti -std=gnu++11 -Wall -c file_util.ii
-o out_good
markus@x4 Release % g++ -S -fPIC -fvisibility=hidden -pthread -march=x86-64 -O2
-fno-exceptions -fno-rtti -std=gnu++11 -Wall -c file_util.ii -o out_bad
markus@x4 Release % diff -u out_good out_bad
...
@@ -4616,7 +4616,7 @@
pushq %rbp
.cfi_def_cfa_offset 128
movl 20(%rsp), %edx
- movq 24(%rsp), %rdi
+ leaq 64(%rsp), %rdi
call
_ZN10extensions9Extension6CreateERKN4base8FilePathENS_8Manifest8LocationERKNS1_15DictionaryValueEiRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPSF_@PLT
movq 32(%rsp), %r13
popq %rax
When I change "leaq 64(%rsp), %rdi" back to "movq 24(%rsp), %rdi"
chromium runs fine.
