[PATCH] D149514: Check if First argument in _builtin_assume_aligned_ is of pointer type

[Rishabh Bali via Phabricator via cfe-commits]

Ris-Bali updated this revision to Diff 519544.
Ris-Bali marked 5 inline comments as done.
Ris-Bali added a comment.

Requested Changes


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149514/new/

https://reviews.llvm.org/D149514

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/lib/Sema/SemaChecking.cpp
  clang/test/Sema/builtin-assume-aligned.c


Index: clang/test/Sema/builtin-assume-aligned.c
===================================================================
--- clang/test/Sema/builtin-assume-aligned.c
+++ clang/test/Sema/builtin-assume-aligned.c
@@ -71,6 +71,26 @@
   return a[0];
 }
 
+int test14(int *a, int b) {
+  a = (int *)__builtin_assume_aligned(b, 32); // expected-error {{incompatible integer to pointer conversion passing 'int' to parameter of type 'const void *}}
+  return a[0];
+}
+
+int test15(int *b) {
+  int arr[3] = {1, 2, 3};
+  b = (int *)__builtin_assume_aligned(arr, 32); 
+  return b[0];
+}
+
+int val(int x) {
+  return x;
+}
+
+int test16(int *b) {
+  b = (int*)__builtin_assume_aligned(val, 32);
+  return b[0];
+}
+
 void test_void_assume_aligned(void) __attribute__((assume_aligned(32))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}}
 int test_int_assume_aligned(void) __attribute__((assume_aligned(16))); // expected-warning {{'assume_aligned' attribute only applies to return values that are pointers}}
 void *test_ptr_assume_aligned(void) __attribute__((assume_aligned(64))); // no-warning
Index: clang/lib/Sema/SemaChecking.cpp
===================================================================
--- clang/lib/Sema/SemaChecking.cpp
+++ clang/lib/Sema/SemaChecking.cpp
@@ -7979,8 +7979,9 @@
   {
     ExprResult FirstArgResult =
         DefaultFunctionArrayLvalueConversion(FirstArg);
-    if (FirstArgResult.isInvalid())
+    if (checkBuiltinArgument(*this, TheCall, 0))
       return true;
+    /// In-place updation of FirstArg by checkBuiltinArgument is ignored.
     TheCall->setArg(0, FirstArgResult.get());
   }
 
Index: clang/lib/CodeGen/CGBuiltin.cpp
===================================================================
--- clang/lib/CodeGen/CGBuiltin.cpp
+++ clang/lib/CodeGen/CGBuiltin.cpp
@@ -2829,8 +2829,6 @@
   case Builtin::BI__builtin_assume_aligned: {
     const Expr *Ptr = E->getArg(0);
     Value *PtrValue = EmitScalarExpr(Ptr);
-    if (PtrValue->getType() != VoidPtrTy)
-      PtrValue = EmitCastToVoidPtr(PtrValue);
     Value *OffsetValue =
       (E->getNumArgs() > 2) ? EmitScalarExpr(E->getArg(2)) : nullptr;
 
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -338,6 +338,9 @@
 - Fix crash when attempting to perform parenthesized initialization of an
   aggregate with a base class with only non-public constructors.
   (`#62296 <https://github.com/llvm/llvm-project/issues/62296>`_)
+- Fix crash when attempting to pass a non-pointer type as first argument of
+  ``__builtin_assume_aligned``.
+  (`#62305 <https://github.com/llvm/llvm-project/issues/62305>`_)
 
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


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