diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -663,6 +663,9 @@
 if (MSVC_IDE OR XCODE)
   set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
 endif()
+if(LLVM_TEST_COVERAGE)
+   set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --per-test-coverage")
+endif()
 set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
 
 # On Win32 hosts, provide an option to specify the path to the GnuWin32 tools.
@@ -784,24 +787,25 @@
   option(LLVM_ADD_NATIVE_VISUALIZERS_TO_SOLUTION "Configure project to use Visual Studio native visualizers" TRUE)
 endif()
 
-if (LLVM_BUILD_INSTRUMENTED OR LLVM_BUILD_INSTRUMENTED_COVERAGE OR
-    LLVM_ENABLE_IR_PGO)
-  if(NOT LLVM_PROFILE_MERGE_POOL_SIZE)
-    # A pool size of 1-2 is probably sufficient on a SSD. 3-4 should be fine
-    # for spining disks. Anything higher may only help on slower mediums.
-    set(LLVM_PROFILE_MERGE_POOL_SIZE "4")
-  endif()
-  if(NOT LLVM_PROFILE_FILE_PATTERN)
-    if(NOT LLVM_PROFILE_DATA_DIR)
-      file(TO_NATIVE_PATH "${LLVM_BINARY_DIR}/profiles" LLVM_PROFILE_DATA_DIR)
+if(NOT LLVM_TEST_COVERAGE)
+  if(LLVM_BUILD_INSTRUMENTED OR LLVM_BUILD_INSTRUMENTED_COVERAGE OR LLVM_ENABLE_IR_PGO)
+    if(NOT LLVM_PROFILE_MERGE_POOL_SIZE)
+      # A pool size of 1-2 is probably sufficient on an SSD. 3-4 should be fine
+      # for spinning disks. Anything higher may only help on slower mediums.
+      set(LLVM_PROFILE_MERGE_POOL_SIZE "4")
     endif()
-    file(TO_NATIVE_PATH "${LLVM_PROFILE_DATA_DIR}/%${LLVM_PROFILE_MERGE_POOL_SIZE}m.profraw" LLVM_PROFILE_FILE_PATTERN)
-  endif()
-  if(NOT LLVM_CSPROFILE_FILE_PATTERN)
-    if(NOT LLVM_CSPROFILE_DATA_DIR)
-      file(TO_NATIVE_PATH "${LLVM_BINARY_DIR}/csprofiles" LLVM_CSPROFILE_DATA_DIR)
+    if(NOT LLVM_PROFILE_FILE_PATTERN)
+      if(NOT LLVM_PROFILE_DATA_DIR)
+        file(TO_NATIVE_PATH "${LLVM_BINARY_DIR}/profiles" LLVM_PROFILE_DATA_DIR)
+      endif()
+      file(TO_NATIVE_PATH "${LLVM_PROFILE_DATA_DIR}/%${LLVM_PROFILE_MERGE_POOL_SIZE}m.profraw" LLVM_PROFILE_FILE_PATTERN)
+    endif()
+    if(NOT LLVM_CSPROFILE_FILE_PATTERN)
+      if(NOT LLVM_CSPROFILE_DATA_DIR)
+        file(TO_NATIVE_PATH "${LLVM_BINARY_DIR}/csprofiles" LLVM_CSPROFILE_DATA_DIR)
+      endif()
+      file(TO_NATIVE_PATH "${LLVM_CSPROFILE_DATA_DIR}/%${LLVM_PROFILE_MERGE_POOL_SIZE}m.profraw" LLVM_CSPROFILE_FILE_PATTERN)
     endif()
-    file(TO_NATIVE_PATH "${LLVM_CSPROFILE_DATA_DIR}/%${LLVM_PROFILE_MERGE_POOL_SIZE}m.profraw" LLVM_CSPROFILE_FILE_PATTERN)
   endif()
 endif()
 
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -1150,6 +1150,7 @@
 endif()
 
 option(LLVM_BUILD_INSTRUMENTED_COVERAGE "Build LLVM and tools with Code Coverage instrumentation" Off)
+option(LLVM_TEST_COVERAGE "Emit individual coverage file for each test case." OFF)
 mark_as_advanced(LLVM_BUILD_INSTRUMENTED_COVERAGE)
 append_if(LLVM_BUILD_INSTRUMENTED_COVERAGE "-fprofile-instr-generate=\"${LLVM_PROFILE_FILE_PATTERN}\" -fcoverage-mapping"
   CMAKE_CXX_FLAGS
diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst
--- a/llvm/docs/CMake.rst
+++ b/llvm/docs/CMake.rst
@@ -375,6 +375,12 @@
   will limit code coverage summaries to just the listed directories. If unset,
   coverage reports will include all sources identified by the tooling.
 
+**LLVM_TEST_COVERAGE**:BOOL
+  Enable individual test case coverage. When set to ON, code coverage data
+  for each test case will be generated and written to a separate directory
+  in the build directory. This allows you to analyze the code coverage of
+  each test case individually. Defaults to OFF
+
 **LLVM_BUILD_LLVM_DYLIB**:BOOL
   If enabled, the target for building the libLLVM shared library is added.
   This library contains all of LLVM's components in a single shared library.
diff --git a/llvm/docs/CommandGuide/lit.rst b/llvm/docs/CommandGuide/lit.rst
--- a/llvm/docs/CommandGuide/lit.rst
+++ b/llvm/docs/CommandGuide/lit.rst
@@ -186,6 +186,12 @@
  Run the tests in a random order, not failing/slowest first. Deprecated,
  use :option:`--order` instead.
 
+.. option:: --per-test-coverage
+
+ Emit the necessary test coverage data, divided per test case (involves
+ setting a unique value to LLVM_PROFILE_FILE for each RUN). The coverage
+ data files will be emitted in the <build>/test/ directory.
+
 .. option:: --max-failures N
 
  Stop execution after the given number ``N`` of failures.
diff --git a/llvm/utils/lit/lit/LitConfig.py b/llvm/utils/lit/lit/LitConfig.py
--- a/llvm/utils/lit/lit/LitConfig.py
+++ b/llvm/utils/lit/lit/LitConfig.py
@@ -37,6 +37,7 @@
         maxIndividualTestTime=0,
         parallelism_groups={},
         echo_all_commands=False,
+        per_test_coverage=False,
     ):
         # The name of the test runner.
         self.progname = progname
@@ -87,6 +88,7 @@
         self.maxIndividualTestTime = maxIndividualTestTime
         self.parallelism_groups = parallelism_groups
         self.echo_all_commands = echo_all_commands
+        self.per_test_coverage = per_test_coverage
 
     @property
     def maxIndividualTestTime(self):
diff --git a/llvm/utils/lit/lit/TestRunner.py b/llvm/utils/lit/lit/TestRunner.py
--- a/llvm/utils/lit/lit/TestRunner.py
+++ b/llvm/utils/lit/lit/TestRunner.py
@@ -1122,10 +1122,23 @@
             command = litConfig.valgrindArgs + command
 
     try:
+        # Check if the --per-test-coverage option is enabled
+        if litConfig.per_test_coverage:
+            # Extract the test case name from the test object
+            test_case_name = test.path_in_suite[-1]
+            test_case_name = test_case_name.rsplit(".", 1)[0] # Remove the file extension
+
+            # Set the LLVM_PROFILE_FILE environment variable
+            llvm_profile_file = test_case_name + ".profraw"
+            env = test.config.environment
+            env["LLVM_PROFILE_FILE"] = llvm_profile_file
+        else:
+            env = test.config.environment
+
         out, err, exitCode = lit.util.executeCommand(
             command,
             cwd=cwd,
-            env=test.config.environment,
+            env=env,
             timeout=litConfig.maxIndividualTestTime,
         )
         return (out, err, exitCode, None)
diff --git a/llvm/utils/lit/lit/cl_arguments.py b/llvm/utils/lit/lit/cl_arguments.py
--- a/llvm/utils/lit/lit/cl_arguments.py
+++ b/llvm/utils/lit/lit/cl_arguments.py
@@ -184,6 +184,12 @@
         help="Do not fail the run if all tests are filtered out",
         action="store_true",
     )
+    execution_group.add_argument(
+        "--per-test-coverage",
+        dest="per_test_coverage",
+        action="store_true",
+        help="Enable individual test case coverage",
+    )
     execution_group.add_argument(
         "--ignore-fail",
         dest="ignoreFail",
diff --git a/llvm/utils/lit/lit/main.py b/llvm/utils/lit/lit/main.py
--- a/llvm/utils/lit/lit/main.py
+++ b/llvm/utils/lit/lit/main.py
@@ -41,6 +41,7 @@
         params=params,
         config_prefix=opts.configPrefix,
         echo_all_commands=opts.echoAllCommands,
+        per_test_coverage=opts.per_test_coverage,
     )
 
     discovered_tests = lit.discovery.find_tests_for_inputs(
diff --git a/llvm/utils/lit/tests/Inputs/per-test-coverage/lit.cfg b/llvm/utils/lit/tests/Inputs/per-test-coverage/lit.cfg
new file mode 100644
--- /dev/null
+++ b/llvm/utils/lit/tests/Inputs/per-test-coverage/lit.cfg
@@ -0,0 +1,6 @@
+import lit.formats
+import os
+
+config.name = "per-test-coverage"
+config.suffixes = [".py"]
+config.test_format = lit.formats.ShTest()
diff --git a/llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.py b/llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.py
new file mode 100644
--- /dev/null
+++ b/llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.py
@@ -0,0 +1,12 @@
+# Check that the environment variable is set correctly
+# RUN: python %s | FileCheck %s
+
+# Python script to read the environment variable
+# and print its value
+import os
+
+llvm_profile_file = os.environ.get('LLVM_PROFILE_FILE')
+print(llvm_profile_file)
+
+# CHECK: per-test-coverage.profraw
+
diff --git a/llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.sh b/llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.sh
new file mode 100644
--- /dev/null
+++ b/llvm/utils/lit/tests/Inputs/per-test-coverage/per-test-coverage.sh
@@ -0,0 +1,4 @@
+# RUN: echo $LLVM_PROFILE_FILE | FileCheck %s
+
+# CHECK: per-test-coverage.profraw
+
diff --git a/llvm/utils/lit/tests/per-test-coverage.py b/llvm/utils/lit/tests/per-test-coverage.py
new file mode 100644
--- /dev/null
+++ b/llvm/utils/lit/tests/per-test-coverage.py
@@ -0,0 +1,6 @@
+# Test LLVM_PROFILE_FILE is set when --per-test-coverage is passed to command line.
+
+# RUN: %{lit} -a -v --per-test-coverage %{inputs}/per-test-coverage/per-test-coverage.py \
+# RUN: | FileCheck -match-full-lines %s
+#
+# CHECK: PASS: per-test-coverage :: per-test-coverage.py ({{[^)]*}})