[llvm-readobj][test] - Cleanup hash-histogram.test

In this test case we use 3 precompiled objects to
test how we print a histogram for an GNU hash section.
It does not make sense to use precompiled objects
for that. Also we could have 2 tests: one for 32 and
another for 64 bits target.

This patch does this change. It is not possible to remove
these precompiled objects because they are used elsewhere.

Differential revision: https://reviews.llvm.org/D71606

llvm/test/tools/llvm-readobj/ELF/hash-histogram.test

@@ -1,36 +1,96 @@
-# RUN: llvm-readelf --elf-hash-histogram %p/Inputs/gnuhash.so.elf-ppc64 \
-# RUN:   | FileCheck %s -check-prefix PPC64GNU
-# RUN: llvm-readelf --elf-hash-histogram %p/Inputs/gnuhash.so.elf-x86_64 \
-# RUN:   | FileCheck %s -check-prefix X86GNU
-# RUN: llvm-readelf --elf-hash-histogram %p/Inputs/got-plt.exe.elf-mipsel \
-# RUN:   | FileCheck %s -check-prefix SYSV
+## Here we test the --elf-hash-histogram command line option.
 
-# PPC64GNU: Histogram for `.gnu.hash' bucket list length (total of 3 buckets)
-# PPC64GNU-NEXT:  Length  Number     % of total  Coverage
-# PPC64GNU-NEXT:       0  1          ( 33.3%)       0.0%
-# PPC64GNU-NEXT:       1  1          ( 33.3%)      25.0%
-# PPC64GNU-NEXT:       2  0          (  0.0%)      25.0%
-# PPC64GNU-NEXT:       3  1          ( 33.3%)     100.0%
+## This test case checks how we built a histogram for a GNU hash section.
+## We check both 32-bit and 64-bit inputs.
 
-# X86GNU: Histogram for `.gnu.hash' bucket list length (total of 3 buckets)
-# X86GNU-NEXT:  Length  Number     % of total  Coverage
-# X86GNU-NEXT:       0  1          ( 33.3%)       0.0%
-# X86GNU-NEXT:       1  1          ( 33.3%)      25.0%
-# X86GNU-NEXT:       2  0          (  0.0%)      25.0%
-# X86GNU-NEXT:       3  1          ( 33.3%)     100.0%
+# RUN: yaml2obj --docnum=1 %s -o %t1-32.o
+# RUN: llvm-readelf --elf-hash-histogram %t1-32.o | FileCheck %s --check-prefix=GNU-HASH
 
-# SYSV: Histogram for bucket list length (total of 3 buckets)
-# SYSV-NEXT:  Length  Number     % of total  Coverage
-# SYSV-NEXT:       0  0          (  0.0%)       0.0%
-# SYSV-NEXT:       1  0          (  0.0%)       0.0%
-# SYSV-NEXT:       2  2          ( 66.7%)      57.1%
-# SYSV-NEXT:       3  1          ( 33.3%)     100.0%
+# RUN: yaml2obj --docnum=2 %s -o %t1-64.o
+# RUN: llvm-readelf --elf-hash-histogram %t1-64.o | FileCheck %s --check-prefix=GNU-HASH
+
+# GNU-HASH:      Histogram for `.gnu.hash' bucket list length (total of 3 buckets)
+# GNU-HASH-NEXT:  Length  Number     % of total  Coverage
+# GNU-HASH-NEXT:       0  1          ( 33.3%)       0.0%
+# GNU-HASH-NEXT:       1  1          ( 33.3%)      25.0%
+# GNU-HASH-NEXT:       2  0          (  0.0%)      25.0%
+# GNU-HASH-NEXT:       3  1          ( 33.3%)     100.0%
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS32
+  Data:    ELFDATA2LSB
+  Type:    ET_DYN
+  Machine: EM_386
+Sections:
+  - Name:  .gnu.hash
+    Type:  SHT_GNU_HASH
+    Flags: [ SHF_ALLOC ]
+    Header:
+      SymNdx: 0x1
+      Shift2: 0x0
+    BloomFilter: [ 0x0 ]
+    HashBuckets: [ 0x00000001, 0x00000004, 0x00000000 ]
+    HashValues:  [ 0x0B887388, 0xECD54542, 0x7C92E3BB, 0x1C5871D9 ]
+  - Name:  .dynamic
+    Type:  SHT_DYNAMIC
+    Flags: [ SHF_WRITE, SHF_ALLOC ]
+    Entries:
+      - Tag:   DT_GNU_HASH
+        Value: 0x0
+      - Tag:   DT_NULL
+        Value: 0x0
+DynamicSymbols:
+  - Name: a
+  - Name: b
+  - Name: c
+  - Name: d
+ProgramHeaders:
+  - Type:  PT_LOAD
+    Sections:
+      - Section: .gnu.hash
+      - Section: .dynamic
+
+--- !ELF
+FileHeader:
+  Class:   ELFCLASS64
+  Data:    ELFDATA2LSB
+  Type:    ET_DYN
+  Machine: EM_X86_64
+Sections:
+  - Name:  .gnu.hash
+    Type:  SHT_GNU_HASH
+    Flags: [ SHF_ALLOC ]
+    Header:
+      SymNdx: 0x1
+      Shift2: 0x0
+    BloomFilter: [ 0x0 ]
+    HashBuckets: [ 0x00000001, 0x00000004, 0x00000000 ]
+    HashValues:  [ 0x0B887388, 0xECD54542, 0x7C92E3BB, 0x1C5871D9 ]
+  - Name:    .dynamic
+    Type:    SHT_DYNAMIC
+    Flags:   [ SHF_WRITE, SHF_ALLOC ]
+    Entries:
+      - Tag:   DT_GNU_HASH
+        Value: 0x0
+      - Tag:   DT_NULL
+        Value: 0x0
+DynamicSymbols:
+  - Name: a
+  - Name: b
+  - Name: c
+  - Name: d
+ProgramHeaders:
+  - Type:  PT_LOAD
+    Sections:
+      - Section: .gnu.hash
+      - Section: .dynamic
 
 ## Show that we report a warning for a hash table which contains an entry of
 ## the bucket array pointing to a cycle.
 
-# RUN: yaml2obj %s -o %t.o
-# RUN: llvm-readelf --elf-hash-histogram 2>&1 %t.o | FileCheck -DFILE=%t.o %s --check-prefix BROKEN
+# RUN: yaml2obj --docnum=3 %s -o %t2.o
+# RUN: llvm-readelf --elf-hash-histogram 2>&1 %t2.o | FileCheck -DFILE=%t2.o %s --check-prefix=BROKEN
 
 # BROKEN:       warning: '[[FILE]]': .hash section is invalid: bucket 1: a cycle was detected in the linked chain
 # BROKEN:       Histogram for bucket list length (total of 1 buckets)