Remove -fextend-this-ptr alias

Author: SLTozer

clang/docs/ReleaseNotes.rst

@@ -418,14 +418,14 @@ New Compiler Flags
   through optimizations, meaning that variables will typically be visible in a
   debugger more often. The flag has two levels: ``-fextend-variable-liveness``,
   or ``-fextend-variable-liveness=all``, extendes the liveness of all user
-  variables and the ``this`` pointer. Alternatively ``-fextend-this-ptr``, or
-  ``-fextend-variable-liveness=this``, has the same behaviour but applies only
-  to the ``this`` variable in C++ class member functions, meaning its effect is
-  a strict subset of ``-fextend-variable-liveness``. Note that this flag
-  modifies the results of optimizations that Clang performs, which will result
-  in reduced performance in generated code; however, this feature will not
-  extend the liveness of some variables in cases where doing so would likely
-  have a severe impact on generated code performance.
+  variables and the ``this`` pointer. Alternatively
+  ``-fextend-variable-liveness=this`` has the same behaviour but applies only to
+  the ``this`` variable in C++ class member functions, meaning its effect is a
+  strict subset of ``-fextend-variable-liveness``. Note that this flag modifies
+  the results of optimizations that Clang performs, which will result in reduced
+  performance in generated code; however, this feature will not extend the
+  liveness of some variables in cases where doing so would likely have a severe
+  impact on generated code performance.
 
 Deprecated Compiler Flags
 -------------------------

clang/include/clang/Driver/Options.td

@@ -4310,10 +4310,6 @@ def fextend_variable_liveness_EQ : Joined<["-"], "fextend-variable-liveness=">,
   NormalizedValues<["All", "This", "None"]>,
   NormalizedValuesScope<"CodeGenOptions::ExtendVariableLivenessKind">,
   MarshallingInfoEnum<CodeGenOpts<"ExtendVariableLiveness">, "None">;
-def fextend_this_ptr_liveness : Flag<["-"], "fextend-this-ptr-liveness">,
-  Visibility<[ClangOption, CC1Option]>,
-  Alias<fextend_variable_liveness_EQ>, AliasArgs<["this"]>,
-  HelpText<"Alias for -fextend-variable-liveness=this.">;
 def fextend_variable_liveness : Flag<["-"], "fextend-variable-liveness">,
   Visibility<[ClangOption, CC1Option]>,
   Alias<fextend_variable_liveness_EQ>, AliasArgs<["all"]>,

clang/test/Driver/extend-variable-liveness.c

@@ -4,7 +4,6 @@
 // RUN: %clang -### -c %s 2>&1 | FileCheck %s --check-prefixes=CHECK,DEFAULT
 // RUN: %clang -fextend-variable-liveness=none -### -c %s 2>&1 | FileCheck %s --check-prefixes=CHECK,NONE
 // RUN: %clang -fextend-variable-liveness=this -### -c %s 2>&1 | FileCheck %s --check-prefixes=CHECK,THIS
-// RUN: %clang -fextend-this-ptr-liveness -### -c %s 2>&1 | FileCheck %s --check-prefixes=CHECK,THIS
 // RUN: %clang -fextend-variable-liveness=all -### -c %s 2>&1 | FileCheck %s --check-prefixes=CHECK,ALL
 // RUN: %clang -fextend-variable-liveness -### -c %s 2>&1 | FileCheck %s --check-prefixes=CHECK,ALL