Revert "[utils] Add script to generate elaborated IR and assembly tests (llvm#89026)"

breaks 4 rhel lit tests

This reverts commit aacea0d.

Change-Id: I5ab315d33441fcebfb2b08b2402b780953dfd30a

Author: ronlieb

llvm/docs/TestingGuide.rst

@@ -433,87 +433,6 @@ actually participate in the test besides holding the ``RUN:`` lines.
   putting the extra files in an ``Inputs/`` directory. This pattern is
   deprecated.
 
-Elaborated tests
-----------------
-
-Generally, IR and assembly test files benefit from being cleaned to remove
-unnecessary details. However, for tests requiring elaborate IR or assembly
-files where cleanup is less practical (e.g., large amount of debug information
-output from Clang), you can include generation instructions within
-``split-file`` part called ``gen``. Then, run
-``llvm/utils/update_test_body.py`` on the test file to generate the needed
-content.
-
-.. code-block:: none
-
-    ; RUN: rm -rf %t && split-file %s %t && cd %t
-    ; RUN: opt -S a.ll ... | FileCheck %s
-
-    ; CHECK: hello
-
-    ;--- a.cc
-    int va;
-    ;--- gen
-    clang --target=x86_64-linux -S -emit-llvm -g a.cc -o -
-
-    ;--- a.ll
-    # content generated by the script 'gen'
-
-.. code-block:: bash
-
-   PATH=/path/to/clang_build/bin:$PATH llvm/utils/update_test_body.py path/to/test.ll
-
-The script will prepare extra files with ``split-file``, invoke ``gen``, and
-then rewrite the part after ``gen`` with its stdout.
-
-For convenience, if the test needs one single assembly file, you can also wrap
-``gen`` and its required files with ``.ifdef`` and ``.endif``. Then you can
-skip ``split-file`` in RUN lines.
-
-.. code-block:: none
-
-    # RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o a.o
-    # RUN: ... | FileCheck %s
-
-    # CHECK: hello
-
-    .ifdef GEN
-    #--- a.cc
-    int va;
-    #--- gen
-    clang --target=x86_64-linux -S -g a.cc -o -
-    .endif
-    # content generated by the script 'gen'
-
-.. note::
-
-  Consider specifying an explicit target triple to avoid differences when
-  regeneration is needed on another machine.
-
-  ``gen`` is invoked with ``PWD`` set to ``/proc/self/cwd``. Clang commands
-  don't need ``-fdebug-compilation-dir=`` since its default value is ``PWD``.
-
-  Check prefixes should be placed before ``.endif`` since the part after
-  ``.endif`` is replaced.
-
-If the test body contains multiple files, you can print ``---`` separators and
-utilize ``split-file`` in ``RUN`` lines.
-
-.. code-block:: none
-
-    # RUN: rm -rf %t && split-file %s %t && cd %t
-    ...
-
-    #--- a.cc
-    int va;
-    #--- b.cc
-    int vb;
-    #--- gen
-    clang --target=x86_64-linux -S -O1 -g a.cc -o -
-    echo '#--- b.s'
-    clang --target=x86_64-linux -S -O1 -g b.cc -o -
-    #--- a.s
-
 Fragile tests
 -------------
 

llvm/test/tools/UpdateTestChecks/lit.local.cfg

@@ -19,8 +19,7 @@ def add_update_script_substition(
     # Specify an explicit default version in UTC tests, so that the --version
     # embedded in UTC_ARGS does not change in all test expectations every time
     # the default is bumped.
-    if name != "%update_test_body":
-        extra_args += " --version=1"
+    extra_args += " --version=1"
     config.substitutions.append(
         (name, "'%s' %s %s" % (python_exe, script_path, extra_args))
     )
@@ -48,7 +47,3 @@ if os.path.isfile(llvm_mca_path):
     config.available_features.add("llvm-mca-binary")
     mca_arg = "--llvm-mca-binary " + shell_quote(llvm_mca_path)
     add_update_script_substition("%update_test_checks", extra_args=mca_arg)
-
-split_file_path = os.path.join(config.llvm_tools_dir, "split-file")
-if os.path.isfile(split_file_path):
-    add_update_script_substition("%update_test_body")

llvm/test/tools/UpdateTestChecks/update_test_body/Inputs/basic-asm.test.expected

@@ -1,24 +1,22 @@
+# Source:
+#   struct e {
+#     enum {} f[16384];
+#     short g;
+#   };
+#   e foo() {
+#     auto E = new e;
+#     return *E;
+#   }
+# Compile with:
+#   clang -O2 -gdwarf-4 -S a.cpp -o a4.s
+
 # RUN: llvm-mc %s -filetype obj -triple x86_64-apple-darwin -o %t.o
 # RUN: llvm-dwarfdump -debug-info -name g %t.o | FileCheck %s
 
 # CHECK: DW_TAG_member
 # CHECK: DW_AT_name ("g")
 # CHECK: DW_AT_data_member_location    (0x4000)
 
-.ifdef GEN
-#--- a.cpp
-struct e {
-  enum {} f[16384];
-  short g;
-};
-e foo() {
-  auto E = new e;
-  return *E;
-}
-#--- gen
-clang --target=x86_64-apple-macosx -O2 -gdwarf-4 -S a.cpp -o -
-.endif
-
 	.section	__TEXT,__text,regular,pure_instructions
 	.macosx_version_min 10, 14
 	.globl	__Z3foov                ## -- Begin function _Z3foov

llvm/test/tools/UpdateTestChecks/update_test_body/Inputs/basic.test.expected

@@ -1,16 +1,16 @@
 # RUN: llvm-mc < %s -filetype obj -triple x86_64 -o - \
 # RUN:   | llvm-dwarfdump - | FileCheck %s
 
+# Generated from:
+#
+#   struct t1 { };
+#   t1 v1;
+#
+# $ clang++ -S -g -fdebug-types-section -gsplit-dwarf -o test.5.split.s -gdwarf-5 -g
+
 # CHECK: DW_TAG_variable
 # CHECK:   DW_AT_type ({{.*}} "t1")
 
-.ifdef GEN
-#--- test.cpp
-struct t1 { };
-t1 v1;
-#--- gen
-clang++ --target=x86_64-linux -S -g -fdebug-types-section -gsplit-dwarf -gdwarf-5 test.cpp -o -
-.endif
 	.text
 	.file	"test.cpp"
 	.section	.debug_types.dwo,"e",@progbits

llvm/test/tools/UpdateTestChecks/update_test_body/basic-asm.test

@@ -50,3 +50,5 @@ Reverts: breaks oclConformance
   SWDEV-460097
   merges: revert : 41466a177a95 [SelectionDAG] Correct the implementation of m_AllOnes. (#90776)
 
+Revert "[utils] Add script to generate elaborated IR and assembly tests (#89026)"
+breaks 4 rhel lit tests