[clang] [clang][SPIRV] Remove volatile variants of GenericCastToPtr* built-ins (PR #146298)

[Wenju He via cfe-commits]

https://github.com/wenju-he created https://github.com/llvm/llvm-project/pull/146298

They are generally implemented with pointer comparison. Volatile is not needed because memory pointed to by the pointer isn't accessed.

>From f77e5b48204609cb9b0c1c4dd6684de013be5008 Mon Sep 17 00:00:00 2001
From: Wenju He <wenju.he at intel.com>
Date: Mon, 30 Jun 2025 09:37:24 +0800
Subject: [PATCH] [clang][SPIRV] Remove volatile variants of GenericCastToPtr*
 built-ins

They are generally implemented with pointer comparison. Volatile is not
needed because memory pointed to by the pointer isn't accessed.
---
 clang/lib/Headers/__clang_spirv_builtins.h | 60 ----------------------
 1 file changed, 60 deletions(-)

diff --git a/clang/lib/Headers/__clang_spirv_builtins.h b/clang/lib/Headers/__clang_spirv_builtins.h
index e344ed52571a7..c210609ad5973 100644
--- a/clang/lib/Headers/__clang_spirv_builtins.h
+++ b/clang/lib/Headers/__clang_spirv_builtins.h
@@ -56,16 +56,6 @@ __spirv_GenericCastToPtrExplicit_ToGlobal(__generic const void *,
                                           int) __SPIRV_NOEXCEPT;
 extern __SPIRV_overloadable
 __SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
-__global volatile void *
-__spirv_GenericCastToPtrExplicit_ToGlobal(__generic volatile void *,
-                                          int) __SPIRV_NOEXCEPT;
-extern __SPIRV_overloadable
-__SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
-__global const volatile void *
-__spirv_GenericCastToPtrExplicit_ToGlobal(__generic const volatile void *,
-                                          int) __SPIRV_NOEXCEPT;
-extern __SPIRV_overloadable
-__SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
 __local void *__spirv_GenericCastToPtrExplicit_ToLocal(__generic void *,
                                                        int) __SPIRV_NOEXCEPT;
 extern __SPIRV_overloadable
@@ -75,16 +65,6 @@ __spirv_GenericCastToPtrExplicit_ToLocal(__generic const void *,
                                          int) __SPIRV_NOEXCEPT;
 extern __SPIRV_overloadable
 __SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
-__local volatile void *
-__spirv_GenericCastToPtrExplicit_ToLocal(__generic volatile void *,
-                                         int) __SPIRV_NOEXCEPT;
-extern __SPIRV_overloadable
-__SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
-__local const volatile void *
-__spirv_GenericCastToPtrExplicit_ToLocal(__generic const volatile void *,
-                                         int) __SPIRV_NOEXCEPT;
-extern __SPIRV_overloadable
-__SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
 __private void *
 __spirv_GenericCastToPtrExplicit_ToPrivate(__generic void *,
                                            int) __SPIRV_NOEXCEPT;
@@ -93,16 +73,6 @@ __SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
 __private const void *
 __spirv_GenericCastToPtrExplicit_ToPrivate(__generic const void *,
                                            int) __SPIRV_NOEXCEPT;
-extern __SPIRV_overloadable
-__SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
-__private volatile void *
-__spirv_GenericCastToPtrExplicit_ToPrivate(__generic volatile void *,
-                                           int) __SPIRV_NOEXCEPT;
-extern __SPIRV_overloadable
-__SPIRV_BUILTIN_ALIAS(__builtin_spirv_generic_cast_to_ptr_explicit)
-__private const volatile void *
-__spirv_GenericCastToPtrExplicit_ToPrivate(__generic const volatile void *,
-                                           int) __SPIRV_NOEXCEPT;
 
 // OpGenericCastToPtr
 
@@ -115,16 +85,6 @@ __spirv_GenericCastToPtr_ToGlobal(__generic const void *p,
                                   int) __SPIRV_NOEXCEPT {
   return (__global const void *)p;
 }
-static __SPIRV_overloadable __SPIRV_inline __global volatile void *
-__spirv_GenericCastToPtr_ToGlobal(__generic volatile void *p,
-                                  int) __SPIRV_NOEXCEPT {
-  return (__global volatile void *)p;
-}
-static __SPIRV_overloadable __SPIRV_inline __global const volatile void *
-__spirv_GenericCastToPtr_ToGlobal(__generic const volatile void *p,
-                                  int) __SPIRV_NOEXCEPT {
-  return (__global const volatile void *)p;
-}
 static __SPIRV_overloadable __SPIRV_inline __local void *
 __spirv_GenericCastToPtr_ToLocal(__generic void *p, int) __SPIRV_NOEXCEPT {
   return (__local void *)p;
@@ -134,16 +94,6 @@ __spirv_GenericCastToPtr_ToLocal(__generic const void *p,
                                  int) __SPIRV_NOEXCEPT {
   return (__local const void *)p;
 }
-static __SPIRV_overloadable __SPIRV_inline __local volatile void *
-__spirv_GenericCastToPtr_ToLocal(__generic volatile void *p,
-                                 int) __SPIRV_NOEXCEPT {
-  return (__local volatile void *)p;
-}
-static __SPIRV_overloadable __SPIRV_inline __local const volatile void *
-__spirv_GenericCastToPtr_ToLocal(__generic const volatile void *p,
-                                 int) __SPIRV_NOEXCEPT {
-  return (__local const volatile void *)p;
-}
 static __SPIRV_overloadable __SPIRV_inline __private void *
 __spirv_GenericCastToPtr_ToPrivate(__generic void *p, int) __SPIRV_NOEXCEPT {
   return (__private void *)p;
@@ -153,16 +103,6 @@ __spirv_GenericCastToPtr_ToPrivate(__generic const void *p,
                                    int) __SPIRV_NOEXCEPT {
   return (__private const void *)p;
 }
-static __SPIRV_overloadable __SPIRV_inline __private volatile void *
-__spirv_GenericCastToPtr_ToPrivate(__generic volatile void *p,
-                                   int) __SPIRV_NOEXCEPT {
-  return (__private volatile void *)p;
-}
-static __SPIRV_overloadable __SPIRV_inline __private const volatile void *
-__spirv_GenericCastToPtr_ToPrivate(__generic const volatile void *p,
-                                   int) __SPIRV_NOEXCEPT {
-  return (__private const volatile void *)p;
-}
 
 #undef __SPIRV_overloadable
 #undef __SPIRV_convergent