https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117260
Bug ID: 117260
Summary: [15 Regression] "phiopt: do
factor_out_conditional_operation for all phis
[PR112418]" vs. GCN
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: openacc, testsuite-fail
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: ams at gcc dot gnu.org, pinskia at gcc dot gnu.org
Target Milestone: ---
Target: GCN
With commit r15-4503-g8d6d6d537fdc754a429b08091422c307188f3c82 "phiopt: do
factor_out_conditional_operation for all phis [PR112418]", we're getting a
regression in GCN offloading testing (but not for nvptx offloading):
[-PASS:-]{+FAIL: libgomp.oacc-fortran/privatized-ref-1.f95
-DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions
(internal compiler error: in execute_todo, at passes.cc:2150)+}
{+FAIL:+} libgomp.oacc-fortran/privatized-ref-1.f95
-DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions
(test for excess errors)
[-PASS:-]{+UNRESOLVED:+} libgomp.oacc-fortran/privatized-ref-1.f95
-DACC_DEVICE_TYPE_radeon=1 -DACC_MEM_SHARED=0 -foffload=amdgcn-amdhsa -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions
[-execution test-]{+compilation failed to produce executable+}
(Other torture-testing optimization levels not affected.)
during GIMPLE pass: phiopt
[...]/source-gcc/libgomp/testsuite/libgomp.oacc-fortran/privatized-ref-1.f95:
In function 'workers.2._omp_fn.0':
[...]/source-gcc/libgomp/testsuite/libgomp.oacc-fortran/privatized-ref-1.f95:98:61:
internal compiler error: in execute_todo, at passes.cc:2150
0x2094b15 internal_error(char const*, ...)
[...]/source-gcc/gcc/diagnostic-global-context.cc:517
0xa6017e fancy_abort(char const*, int, char const*)
[...]/source-gcc/gcc/diagnostic.cc:1551
0x7fd1dd execute_todo
[...]/source-gcc/gcc/passes.cc:2150
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
gcn mkoffload: fatal error:
[...]/install/offload-amdgcn-amdhsa/bin//x86_64-pc-linux-gnu-accel-amdgcn-amdhsa-gcc
returned 1 exit status
compilation terminated.
lto-wrapper: fatal error:
[...]/install/offload-amdgcn-amdhsa/libexec/gcc/x86_64-pc-linux-gnu/15.0.0//accel/amdgcn-amdhsa/mkoffload
returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
compiler exited with status 1
That's during 'phiopt4' in 'gcc/passes.cc':
[...]
2144 static void
2145 execute_todo (unsigned int flags)
2146 {
2147 if (flag_checking
2148 && cfun
2149 && need_ssa_update_p (cfun))
2150 gcc_assert (flags & TODO_update_ssa_any);
[...]
It similarly reproduces in a pure '--target=amdgcn-amdhsa' configuration (...,
which likely is easier for experimenting). (But beware: for GCN target,
compiling that test case has to be expected to run later, 'during RTL pass:
final', into 'libgomp.oacc-fortran/privatized-ref-1.f95:63:14: internal
compiler error: Segmentation fault', so don't let that confuse you.)
Happy to supply any kind of artifacts that may be helpful.
