https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112937
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
The unconditional GCN 'f->use_flat_addressing = true;' also has an effect on
one (only!) libgomp offloading test case, for
'-foffload-options=amdgcn-amdhsa=-march=gfx90a' (only!):
@@ -6188,11 +6188,11 @@ PASS: libgomp.fortran/target1.f90 -O1 execution
test
PASS: libgomp.fortran/target1.f90 -O2 (test for excess errors)
PASS: libgomp.fortran/target1.f90 -O2 execution test
PASS: libgomp.fortran/target1.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions (test for excess errors)
{+WARNING: program timed out.+}
[-PASS:-]{+FAIL:+} libgomp.fortran/target1.f90 -O3 -fomit-frame-pointer
-funroll-loops -fpeel-loops -ftracer -finline-functions execution test
PASS: libgomp.fortran/target1.f90 -O3 -g (test for excess errors)
{+WARNING: program timed out.+}
[-PASS:-]{+FAIL:+} libgomp.fortran/target1.f90 -O3 -g execution test
PASS: libgomp.fortran/target1.f90 -Os (test for excess errors)
PASS: libgomp.fortran/target1.f90 -Os execution test
libgomp: GCN fatal error: Asynchronous queue error
Runtime message: HSA_STATUS_ERROR_INVALID_ISA: The instruction set
architecture is invalid.
[hangs]
Huh!? That looks very odd (to me, at least).
Manually trying with simply '-O3', that appears to be 100 % reproducible on our
gfx90a systems -- but nowhere else. ..., and disappears with the unconditional
GCN 'f->use_flat_addressing = true;' reverted. (..., which of course would
regress other new test cases.)
