https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88917
Bug ID: 88917
Summary: [8/9 Regression] Error: can't resolve `.text' {.text
section} - `.LCFI2' {.text.unlikely section} with
-fno-dwarf2-cfi-asm
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: assemble-failure
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 45465
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45465&action=edit
reduced testcase
Output:
$ x86_64-pc-linux-gnu-gcc -O2 -fno-dwarf2-cfi-asm
-mindirect-branch=thunk-inline testcase.c
/tmp/cc0YVyAa.s: Assembler messages:
/tmp/cc0YVyAa.s:104: Error: can't resolve `.text' {.text section} - `.LCFI2'
{.text.unlikely section}
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-268059-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-268059-checking-yes-rtl-df-extra-amd64
Thread model: posix
gcc version 9.0.0 20190118 (experimental) (GCC)
Interestingly, -fno-isolate-erroneous-paths-dereference prevents the problem,
even though the UB is not dereference, but potential divide by zero.
