[LLVM/tools][test] - Remove/fix dead check prefixes.

[grimar]

Summary

I've experimented with the code for FileCheck that would
enable reporting a error when there are unknown check-prefixes.
E.g. when we have --check-prefixes=KNOWN,UNKNOWN, there is no error
reported about UNKNOWN.

The behavior looks wierd to me, but multiple-missing-prefixes.txt
and others FileCheck tests seems explicitly check this behavior.
Also there are about 1000 tests in LLVM
that have unused prefixes. Most of them lives in:

CodeGen/*
DebugInfo/X86/*
Instrumentation/*
Linker/*
MC/*
Other/*
Transforms/*

(A random example:
https://github.com/llvm/llvm-project/blob/master/llvm/test/CodeGen/PowerPC/srem-vector-lkk.ll has an excessive CHECK)

At the same time it is obvious that we do not want to have
dead prefixes in llvm/test/tools tests. I've fixed all what was able to find.

Note: this fixes patch-debug-dir.test.

[mstorsjo]

llvm/test/tools/llvm-objcopy/COFF/patch-debug-dir.test

21

This bit LGTM - oops and thanks.

[MaskRay]

Looks great!

llvm/test/tools/llvm-symbolizer/split-dwarf.test

8

--check-prefixes=SPLIT,DWO

[alexander-shaposhnikov]

LG, thanks

[jhenderson]

LGTM.

llvm/test/tools/llvm-symbolizer/split-dwarf.test

8

Do this change in all places in this file or none, I'd say, for consistency.

[grimar]

llvm/test/tools/llvm-symbolizer/split-dwarf.test

8

I'll prepare a separate cleanup change, I guess we might have the same situation in other tests and would be better to fix them at once.

llvm/test/tools/llvm-dwp/X86/merge.test

 RUN: llvm-dwp %p/../Inputs/merge/notypes/c.dwo %p/../Inputs/merge/notypes/ab.dwp -o - | \
-RUN:   llvm-dwarfdump -v - | FileCheck --check-prefix=CHECK --check-prefix=NOTYP %s
+RUN:   llvm-dwarfdump -v - | FileCheck --check-prefix=CHECK %s
 
 DWP from a DWO (c.dwo) and a DWP (ab.dwp, created from a.dwo and b.dwo)
 Make sure the entries for A and B are updated correctly when read/processed from ab.dwp
 a.cpp:
   struct foo { };
   foo a;
 
 b.cpp:

llvm/test/tools/llvm-objcopy/COFF/patch-debug-dir.test

 # CONTENTS-POST-NEXT:  {{.*}} 19000000 1c300000 1c040000 52534453
 # CONTENTS-NEXT:       {{.*}} c1330757 2839a337 4c4c4420 5044422e
 # CONTENTS-NEXT:       {{.*}} 01000000 00
 
 # SECTIONS:           Name: .buildid
 # SECTIONS-NEXT:      VirtualSize:
 # SECTIONS-NEXT:      VirtualAddress:
 # SECTIONS-NEXT:      RawDataSize:
-# SECTIONS-NEXT-PRE:  PointerToRawData: 0x800
-# SECTIONS-NEXT-POST: PointerToRawData: 0x400
+# SECTIONS-PRE-NEXT:  PointerToRawData: 0x600
+# SECTIONS-POST-NEXT: PointerToRawData: 0x400
 
 --- !COFF
 OptionalHeader:  
   AddressOfEntryPoint: 4096
   ImageBase:       1073741824
   SectionAlignment: 4096
   FileAlignment:   512
   MajorOperatingSystemVersion: 6

llvm/test/tools/llvm-objcopy/ELF/set-section-flags-multiple.test

 # RUN: yaml2obj %s -o %t
 
 # RUN: llvm-objcopy --set-section-flags=.foo=alloc --set-section-flags=.bar=code %t %t.2
-# RUN: llvm-readobj --sections %t.2 | FileCheck %s --check-prefixes=CHECK,ALLOC,WRITE
+# RUN: llvm-readobj --sections %t.2 | FileCheck %s
 
 !ELF
 FileHeader:
   Class:           ELFCLASS64
   Data:            ELFDATA2LSB
   Type:            ET_REL
   Machine:         EM_X86_64
 Sections:

llvm/test/tools/llvm-objcopy/MachO/strip-all.test

 ## Show that llvm-objcopy/llvm-strip removes all symbols and debug sections.
 
 # RUN: yaml2obj %p/Inputs/strip-all.yaml -o %t.exec
 # RUN: yaml2obj %p/Inputs/strip-all-with-dwarf.yaml -o %t.dwarf
 
 ## Check that the symbol list satisfies the order: local / defined external /
 ## undefined external, otherwise llvm-objcopy will fail.
 # RUN: llvm-objcopy %t.exec /dev/null
 
 # RUN: llvm-objcopy --strip-all %t.exec %t.exec.stripped
 # RUN: llvm-readobj --sections --relocations --symbols %t.exec.stripped \
-# RUN:   | FileCheck --check-prefixes=COMMON,EXEC %s
+# RUN:   | FileCheck --check-prefix=COMMON %s
 
 # RUN: llvm-objcopy --strip-all %t.dwarf %t.dwarf.stripped
 # RUN: llvm-readobj --sections --relocations --symbols %t.dwarf.stripped \
 # RUN:   | FileCheck --check-prefixes=COMMON,DWARF %s
 
 ## The output of "llvm-strip" should be identical with that of
 ## "llvm-strip --strip-all" and "llvm-objcopy --strip-all".
 # RUN: llvm-strip %t.exec -o %t2

llvm/test/tools/llvm-readobj/archive.test

 ## Show that dumping operations apply to all members in an archive.
 
 # RUN: rm -f %t.a
 # RUN: rm -rf %t.dir
 # RUN: mkdir -p %t.dir
 # RUN: yaml2obj --docnum=1 %s -o %t.dir/trivial.obj.elf-x86-64
 # RUN: yaml2obj --docnum=2 %s -o %t.dir/trivial.obj.elf-i386
 # RUN: yaml2obj --docnum=3 %s -o %t.dir/trivial.obj.coff-arm
 
 # RUN: llvm-ar rc %t.a %t.dir/trivial.obj.elf-x86-64 %t.dir/trivial.obj.elf-i386 %t.dir/trivial.obj.coff-arm
-# RUN: llvm-readobj --all %t.a | FileCheck %s -DARFILE="%t.a" --check-prefixes=HEADER,LLVM,COFF
-# RUN: llvm-readelf --all %t.a | FileCheck %s -DARFILE="%t.a" --check-prefixes=HEADER,GNU,COFF
+# RUN: llvm-readobj --all %t.a | FileCheck %s -DARFILE="%t.a" --check-prefixes=LLVM,COFF
+# RUN: llvm-readelf --all %t.a | FileCheck %s -DARFILE="%t.a" --check-prefixes=GNU,COFF
 
 # LLVM: {{^$}}
 # LLVM-NEXT: File: [[ARFILE]](trivial.obj.elf-x86-64)
 # LLVM: Format: elf64-x86-64
 # LLVM: ElfHeader {
 # LLVM:   Machine: EM_X86_64
 # LLVM: Sections [
 # LLVM: Relocations [

llvm/test/tools/llvm-symbolizer/split-dwarf.test

 RUN: rm -rf %t
 RUN: mkdir -p %t
 
 RUN: cp %p/Inputs/split-dwarf-test.dwo %t
 
 RUN: cd %t
 RUN: llvm-symbolizer --functions=linkage --inlining --demangle=false \
-RUN:    --obj=%p/Inputs/split-dwarf-test 0x400504 0x4004f4 | FileCheck --check-prefix=CHECK --check-prefix=SPLIT --check-prefix=DWO %s
+RUN:    --obj=%p/Inputs/split-dwarf-test 0x400504 0x4004f4 | FileCheck --check-prefix=SPLIT --check-prefix=DWO %s
 
 Ensure we get the same results in the absence of gmlt-like data in the executable but the presence of a .dwo file
 
 RUN: echo "%p/Inputs/split-dwarf-test-nogmlt 0x400504" >> %t.input
 RUN: echo "%p/Inputs/split-dwarf-test-nogmlt 0x4004f4" >> %t.input
 RUN: llvm-symbolizer --functions=linkage --inlining --demangle=false \
 RUN:    --default-arch=i386 --obj=%p/Inputs/split-dwarf-test-nogmlt 0x400504 0x4004f4 | FileCheck --check-prefix=SPLIT --check-prefix=DWO %s