AsmParser: parse zeroinitializer, poison constants

[artagnon]

LLParser::parseConstantValue is missing support for parsing zeroinitializer and poison constants. Fix this.

[nikic]

LGTM

[llvm-ci]

LLVM Buildbot has detected a new failure on builder openmp-offload-libc-amdgpu-runtime running on omp-vega20-1 while building llvm at step 7 "Add check check-offload".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/73/builds/9234

Here is the relevant piece of the build log for the reference

Step 7 (Add check check-offload) failure: test (failure)
******************** TEST 'libomptarget :: amdgcn-amd-amdhsa :: sanitizer/kernel_crash_async.c' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 2
/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/clang -fopenmp    -I /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test -I /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload -L /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./lib -L /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/openmp/runtime/src  -nogpulib -Wl,-rpath,/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload -Wl,-rpath,/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./lib  -fopenmp-targets=amdgcn-amd-amdhsa -O3 /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c -o /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload/test/amdgcn-amd-amdhsa/sanitizer/Output/kernel_crash_async.c.tmp -Xoffload-linker -lc -Xoffload-linker -lm /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./lib/libomptarget.devicertl.a
# executed command: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/clang -fopenmp -I /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test -I /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -L /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload -L /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./lib -L /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -nogpulib -Wl,-rpath,/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload -Wl,-rpath,/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/openmp/runtime/src -Wl,-rpath,/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./lib -fopenmp-targets=amdgcn-amd-amdhsa -O3 /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c -o /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload/test/amdgcn-amd-amdhsa/sanitizer/Output/kernel_crash_async.c.tmp -Xoffload-linker -lc -Xoffload-linker -lm /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./lib/libomptarget.devicertl.a
# RUN: at line 3
/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/not --crash env -u LLVM_DISABLE_SYMBOLIZATION OFFLOAD_TRACK_NUM_KERNEL_LAUNCH_TRACES=1 /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload/test/amdgcn-amd-amdhsa/sanitizer/Output/kernel_crash_async.c.tmp 2>&1 | /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c --check-prefixes=TRACE
# executed command: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/not --crash env -u LLVM_DISABLE_SYMBOLIZATION OFFLOAD_TRACK_NUM_KERNEL_LAUNCH_TRACES=1 /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload/test/amdgcn-amd-amdhsa/sanitizer/Output/kernel_crash_async.c.tmp
# executed command: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c --check-prefixes=TRACE
# RUN: at line 4
/home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/not --crash /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload/test/amdgcn-amd-amdhsa/sanitizer/Output/kernel_crash_async.c.tmp 2>&1 | /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c --check-prefixes=CHECK
# executed command: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/not --crash /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/runtimes/runtimes-bins/offload/test/amdgcn-amd-amdhsa/sanitizer/Output/kernel_crash_async.c.tmp
# executed command: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.build/./bin/FileCheck /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c --check-prefixes=CHECK
# .---command stderr------------
# | /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c:39:11: error: CHECK: expected string not found in input
# | // CHECK: Kernel {{[0-9]}}: {{.*}} (__omp_offloading_{{.*}}_main_l29)
# |           ^
# | <stdin>:1:1: note: scanning from here
# | Display only launched kernel:
# | ^
# | <stdin>:2:16: note: possible intended match here
# | Kernel 'omp target in main @ 29 (__omp_offloading_802_d8283c2_main_l29)'
# |                ^
# | 
# | Input file: <stdin>
# | Check file: /home/ompworker/bbot/openmp-offload-libc-amdgpu-runtime/llvm.src/offload/test/sanitizer/kernel_crash_async.c
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: Display only launched kernel: 
# | check:39'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
# |             2: Kernel 'omp target in main @ 29 (__omp_offloading_802_d8283c2_main_l29)' 
# | check:39'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# | check:39'1                    ?                                                          possible intended match
# |             3: OFFLOAD ERROR: Memory access fault by GPU 1 (agent 0x55a4a465c910) at virtual address (nil). Reasons: Page not present or supervisor privilege, Write access to a read-only page 
# | check:39'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             4: Use 'OFFLOAD_TRACK_ALLOCATION_TRACES=true' to track device allocations 
# | check:39'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             5: error: Aborted 
# | check:39'0     ~~~~~~~~~~~~~~~
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

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