[Verifier] Allow vector type in atomic load and store

Vector types on atomics are assumed to be invalid by the verifier. However,
this type can be valid if it is lowered by codegen.

Author: jofrn

llvm/docs/LangRef.rst

@@ -10956,8 +10956,8 @@ If the ``load`` is marked as ``atomic``, it takes an extra :ref:`ordering
 <ordering>` and optional ``syncscope("<target-scope>")`` argument. The
 ``release`` and ``acq_rel`` orderings are not valid on ``load`` instructions.
 Atomic loads produce :ref:`defined <memmodel>` results when they may see
-multiple atomic stores. The type of the pointee must be an integer, pointer, or
-floating-point type whose bit width is a power of two greater than or equal to
+multiple atomic stores. The type of the pointee must be an integer, pointer,
+floating-point, or vector type whose bit width is a power of two greater than or equal to
 eight and less than or equal to a target-specific size limit.  ``align`` must be
 explicitly specified on atomic loads. Note: if the alignment is not greater or
 equal to the size of the `<value>` type, the atomic operation is likely to
@@ -11097,8 +11097,8 @@ If the ``store`` is marked as ``atomic``, it takes an extra :ref:`ordering
 <ordering>` and optional ``syncscope("<target-scope>")`` argument. The
 ``acquire`` and ``acq_rel`` orderings aren't valid on ``store`` instructions.
 Atomic loads produce :ref:`defined <memmodel>` results when they may see
-multiple atomic stores. The type of the pointee must be an integer, pointer, or
-floating-point type whose bit width is a power of two greater than or equal to
+multiple atomic stores. The type of the pointee must be an integer, pointer,
+floating-point, or vector type whose bit width is a power of two greater than or equal to
 eight and less than or equal to a target-specific size limit.  ``align`` must be
 explicitly specified on atomic stores. Note: if the alignment is not greater or
 equal to the size of the `<value>` type, the atomic operation is likely to

llvm/lib/IR/Verifier.cpp

@@ -4255,9 +4255,10 @@ void Verifier::visitLoadInst(LoadInst &LI) {
     Check(LI.getOrdering() != AtomicOrdering::Release &&
               LI.getOrdering() != AtomicOrdering::AcquireRelease,
           "Load cannot have Release ordering", &LI);
-    Check(ElTy->isIntOrPtrTy() || ElTy->isFloatingPointTy(),
-          "atomic load operand must have integer, pointer, or floating point "
-          "type!",
+    Check(ElTy->getScalarType()->isIntOrPtrTy() ||
+              ElTy->getScalarType()->isFloatingPointTy(),
+          "atomic load operand must have integer, pointer, floating point, "
+          "or vector type!",
           ElTy, &LI);
     checkAtomicMemAccessSize(ElTy, &LI);
   } else {
@@ -4281,9 +4282,10 @@ void Verifier::visitStoreInst(StoreInst &SI) {
     Check(SI.getOrdering() != AtomicOrdering::Acquire &&
               SI.getOrdering() != AtomicOrdering::AcquireRelease,
           "Store cannot have Acquire ordering", &SI);
-    Check(ElTy->isIntOrPtrTy() || ElTy->isFloatingPointTy(),
-          "atomic store operand must have integer, pointer, or floating point "
-          "type!",
+    Check(ElTy->getScalarType()->isIntOrPtrTy() ||
+              ElTy->getScalarType()->isFloatingPointTy(),
+          "atomic store operand must have integer, pointer, floating point, "
+          "or vector type!",
           ElTy, &SI);
     checkAtomicMemAccessSize(ElTy, &SI);
   } else {

llvm/test/Verifier/atomics.ll

@@ -1,14 +1,15 @@
 ; RUN: not opt -passes=verify < %s 2>&1 | FileCheck %s
+; CHECK: atomic store operand must have integer, pointer, floating point, or vector type!
+; CHECK: atomic load operand must have integer, pointer, floating point, or vector type!
 
-; CHECK: atomic store operand must have integer, pointer, or floating point type!
-; CHECK: atomic load operand must have integer, pointer, or floating point type!
+%ty = type { i32 };
 
-define void @foo(ptr %P, <1 x i64> %v) {
-  store atomic <1 x i64> %v, ptr %P unordered, align 8
+define void @foo(ptr %P, %ty %v) {
+  store atomic %ty %v, ptr %P unordered, align 8
   ret void
 }
 
-define <1 x i64> @bar(ptr %P) {
-  %v = load atomic <1 x i64>, ptr %P unordered, align 8
-  ret <1 x i64> %v
+define %ty @bar(ptr %P) {
+  %v = load atomic %ty, ptr %P unordered, align 8
+  ret %ty %v
 }