https://github.com/AmrDeveloper updated 
https://github.com/llvm/llvm-project/pull/136488

>From 5d07a639dc6c933f6f171e501e4ec20d731553e3 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Sat, 19 Apr 2025 21:03:07 +0200
Subject: [PATCH 1/2] [CIR] Upstream initial support for fixed size VectorType

---
 .../CIR/Dialect/Builder/CIRBaseBuilder.h      |  2 +
 .../include/clang/CIR/Dialect/IR/CIRTypes.td  | 22 +++++-
 clang/lib/CIR/CodeGen/CIRGenBuilder.h         |  3 +
 clang/lib/CIR/CodeGen/CIRGenTypes.cpp         |  9 +++
 clang/lib/CIR/Dialect/IR/CIRDialect.cpp       |  2 +-
 clang/lib/CIR/Dialect/IR/CIRTypes.cpp         | 19 ++++-
 .../CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp |  5 ++
 clang/test/CIR/CodeGen/vector-ext.cpp         | 73 +++++++++++++++++++
 clang/test/CIR/CodeGen/vector.cpp             | 60 +++++++++++++++
 clang/test/CIR/IR/vector.cir                  | 40 ++++++++++
 10 files changed, 232 insertions(+), 3 deletions(-)
 create mode 100644 clang/test/CIR/CodeGen/vector-ext.cpp
 create mode 100644 clang/test/CIR/CodeGen/vector.cpp
 create mode 100644 clang/test/CIR/IR/vector.cir

diff --git a/clang/include/clang/CIR/Dialect/Builder/CIRBaseBuilder.h 
b/clang/include/clang/CIR/Dialect/Builder/CIRBaseBuilder.h
index d2a241964f34f..04d9fec9f3001 100644
--- a/clang/include/clang/CIR/Dialect/Builder/CIRBaseBuilder.h
+++ b/clang/include/clang/CIR/Dialect/Builder/CIRBaseBuilder.h
@@ -93,6 +93,8 @@ class CIRBaseBuilderTy : public mlir::OpBuilder {
       return cir::FPAttr::getZero(ty);
     if (auto arrTy = mlir::dyn_cast<cir::ArrayType>(ty))
       return getZeroAttr(arrTy);
+    if (auto vecTy = mlir::dyn_cast<cir::VectorType>(ty))
+      return getZeroAttr(vecTy);
     if (auto ptrTy = mlir::dyn_cast<cir::PointerType>(ty))
       return getConstNullPtrAttr(ptrTy);
     if (auto recordTy = mlir::dyn_cast<cir::RecordType>(ty))
diff --git a/clang/include/clang/CIR/Dialect/IR/CIRTypes.td 
b/clang/include/clang/CIR/Dialect/IR/CIRTypes.td
index a552b6081f5dc..8fb46cea618a3 100644
--- a/clang/include/clang/CIR/Dialect/IR/CIRTypes.td
+++ b/clang/include/clang/CIR/Dialect/IR/CIRTypes.td
@@ -307,6 +307,26 @@ def CIR_ArrayType : CIR_Type<"Array", "array",
   }];
 }
 
+//===----------------------------------------------------------------------===//
+// VectorType (fixed size)
+//===----------------------------------------------------------------------===//
+
+def CIR_VectorType : CIR_Type<"Vector", "vector",
+    [DeclareTypeInterfaceMethods<DataLayoutTypeInterface>]> {
+
+  let summary = "CIR vector type";
+  let description = [{
+    `cir.vector' represents fixed-size vector types.  The parameters are the
+    element type and the number of elements.
+  }];
+
+  let parameters = (ins "mlir::Type":$eltType, "uint64_t":$size);
+
+  let assemblyFormat = [{
+    `<` $eltType `x` $size `>`
+  }];
+}
+
 
//===----------------------------------------------------------------------===//
 // FuncType
 
//===----------------------------------------------------------------------===//
@@ -530,7 +550,7 @@ def CIRRecordType : Type<
 
//===----------------------------------------------------------------------===//
 
 def CIR_AnyType : AnyTypeOf<[
-  CIR_VoidType, CIR_BoolType, CIR_ArrayType, CIR_IntType, CIR_AnyFloat,
+  CIR_VoidType, CIR_BoolType, CIR_ArrayType, CIR_VectorType, CIR_IntType, 
CIR_AnyFloat,
   CIR_PointerType, CIR_FuncType, CIR_RecordType
 ]>;
 
diff --git a/clang/lib/CIR/CodeGen/CIRGenBuilder.h 
b/clang/lib/CIR/CodeGen/CIRGenBuilder.h
index d98416734b56e..ae4f5c5ebef94 100644
--- a/clang/lib/CIR/CodeGen/CIRGenBuilder.h
+++ b/clang/lib/CIR/CodeGen/CIRGenBuilder.h
@@ -82,6 +82,9 @@ class CIRGenBuilderTy : public cir::CIRBaseBuilderTy {
                   cir::IntType>(ty))
       return true;
 
+    if (mlir::isa<cir::VectorType>(ty))
+      return isSized(mlir::cast<cir::VectorType>(ty).getEltType());
+
     assert(!cir::MissingFeatures::unsizedTypes());
     return false;
   }
diff --git a/clang/lib/CIR/CodeGen/CIRGenTypes.cpp 
b/clang/lib/CIR/CodeGen/CIRGenTypes.cpp
index c286aef360b01..01e8f3576fbe3 100644
--- a/clang/lib/CIR/CodeGen/CIRGenTypes.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenTypes.cpp
@@ -399,6 +399,15 @@ mlir::Type CIRGenTypes::convertType(QualType type) {
     break;
   }
 
+  case Type::ExtVector:
+  case Type::Vector: {
+    const VectorType *vec = cast<VectorType>(ty);
+    const mlir::Type elemTy = convertTypeForMem(vec->getElementType());
+    resultType = cir::VectorType::get(builder.getContext(), elemTy,
+                                      vec->getNumElements());
+    break;
+  }
+
   case Type::FunctionNoProto:
   case Type::FunctionProto:
     resultType = convertFunctionTypeInternal(type);
diff --git a/clang/lib/CIR/Dialect/IR/CIRDialect.cpp 
b/clang/lib/CIR/Dialect/IR/CIRDialect.cpp
index d2313e75870b4..1011f1b76b19b 100644
--- a/clang/lib/CIR/Dialect/IR/CIRDialect.cpp
+++ b/clang/lib/CIR/Dialect/IR/CIRDialect.cpp
@@ -212,7 +212,7 @@ static LogicalResult checkConstantTypes(mlir::Operation 
*op, mlir::Type opType,
   }
 
   if (isa<cir::ZeroAttr>(attrType)) {
-    if (isa<cir::RecordType, cir::ArrayType>(opType))
+    if (isa<cir::RecordType, cir::ArrayType, cir::VectorType>(opType))
       return success();
     return op->emitOpError("zero expects struct or array type");
   }
diff --git a/clang/lib/CIR/Dialect/IR/CIRTypes.cpp 
b/clang/lib/CIR/Dialect/IR/CIRTypes.cpp
index 8b5646f339bb3..f4ec524b65129 100644
--- a/clang/lib/CIR/Dialect/IR/CIRTypes.cpp
+++ b/clang/lib/CIR/Dialect/IR/CIRTypes.cpp
@@ -622,7 +622,7 @@ BoolType::getABIAlignment(const ::mlir::DataLayout 
&dataLayout,
 }
 
 
//===----------------------------------------------------------------------===//
-//  Definitions
+//  ArrayType Definitions
 
//===----------------------------------------------------------------------===//
 
 llvm::TypeSize
@@ -637,6 +637,23 @@ ArrayType::getABIAlignment(const ::mlir::DataLayout 
&dataLayout,
   return dataLayout.getTypeABIAlignment(getEltType());
 }
 
+//===----------------------------------------------------------------------===//
+// VectorType Definitions
+//===----------------------------------------------------------------------===//
+
+llvm::TypeSize cir::VectorType::getTypeSizeInBits(
+    const ::mlir::DataLayout &dataLayout,
+    ::mlir::DataLayoutEntryListRef params) const {
+  return llvm::TypeSize::getFixed(getSize() *
+                                  dataLayout.getTypeSizeInBits(getEltType()));
+}
+
+uint64_t
+cir::VectorType::getABIAlignment(const ::mlir::DataLayout &dataLayout,
+                                 ::mlir::DataLayoutEntryListRef params) const {
+  return llvm::NextPowerOf2(dataLayout.getTypeSizeInBits(*this));
+}
+
 
//===----------------------------------------------------------------------===//
 // PointerType Definitions
 
//===----------------------------------------------------------------------===//
diff --git a/clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp 
b/clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
index 8c4a67258df3f..9c35327e43215 100644
--- a/clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
+++ b/clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
@@ -19,6 +19,7 @@
 #include "mlir/Dialect/DLTI/DLTI.h"
 #include "mlir/Dialect/Func/IR/FuncOps.h"
 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
+#include "mlir/Dialect/LLVMIR/LLVMTypes.h"
 #include "mlir/IR/BuiltinDialect.h"
 #include "mlir/IR/BuiltinOps.h"
 #include "mlir/IR/Types.h"
@@ -1308,6 +1309,10 @@ static void prepareTypeConverter(mlir::LLVMTypeConverter 
&converter,
         convertTypeForMemory(converter, dataLayout, type.getEltType());
     return mlir::LLVM::LLVMArrayType::get(ty, type.getSize());
   });
+  converter.addConversion([&](cir::VectorType type) -> mlir::Type {
+    const mlir::Type ty = converter.convertType(type.getEltType());
+    return mlir::VectorType::get(type.getSize(), ty);
+  });
   converter.addConversion([&](cir::BoolType type) -> mlir::Type {
     return mlir::IntegerType::get(type.getContext(), 1,
                                   mlir::IntegerType::Signless);
diff --git a/clang/test/CIR/CodeGen/vector-ext.cpp 
b/clang/test/CIR/CodeGen/vector-ext.cpp
new file mode 100644
index 0000000000000..9c3fdb0b9c31b
--- /dev/null
+++ b/clang/test/CIR/CodeGen/vector-ext.cpp
@@ -0,0 +1,73 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value 
-fclangir -emit-cir %s -o %t.cir
+// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value 
-fclangir -emit-llvm %s -o %t-cir.ll
+// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value 
-emit-llvm %s -o %t.ll
+// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG
+
+typedef int vi4 __attribute__((ext_vector_type(4)));
+typedef int vi3 __attribute__((ext_vector_type(3)));
+typedef int vi2 __attribute__((ext_vector_type(2)));
+typedef double vd2 __attribute__((ext_vector_type(2)));
+
+vi4 vec_a;
+// CIR: cir.global external @[[VEC_A:.*]] = #cir.zero : !cir.vector<!s32i x 4>
+
+// LLVM: @[[VEC_A:.*]] = dso_local global <4 x i32> zeroinitializer
+
+// OGCG: @[[VEC_A:.*]] = global <4 x i32> zeroinitializer
+
+vi3 vec_b;
+// CIR: cir.global external @[[VEC_B:.*]] = #cir.zero : !cir.vector<!s32i x 3>
+
+// LLVM: @[[VEC_B:.*]] = dso_local global <3 x i32> zeroinitializer
+
+// OGCG: @[[VEC_B:.*]] = global <3 x i32> zeroinitializer
+
+vi2 vec_c;
+// CIR: cir.global external @[[VEC_C:.*]] = #cir.zero : !cir.vector<!s32i x 2>
+
+// LLVM: @[[VEC_C:.*]] = dso_local global <2 x i32> zeroinitializer
+
+// OGCG: @[[VEC_C:.*]] = global <2 x i32> zeroinitializer
+
+vd2 d;
+
+// CIR: cir.global external @[[VEC_D:.*]] = #cir.zero : 
!cir.vector<!cir.double x 2>
+
+// LLVM: @[[VEC_D:.*]] = dso_local global <2 x double> zeroinitialize
+
+// OGCG: @[[VEC_D:.*]] = global <2 x double> zeroinitializer
+
+void foo() {
+  vi4 a;
+  vi3 b;
+  vi2 c;
+  vd2 d;
+}
+
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["a"]
+// CIR: %[[VEC_B:.*]] = cir.alloca !cir.vector<!s32i x 3>, 
!cir.ptr<!cir.vector<!s32i x 3>>, ["b"]
+// CIR: %[[VEC_C:.*]] = cir.alloca !cir.vector<!s32i x 2>, 
!cir.ptr<!cir.vector<!s32i x 2>>, ["c"]
+// CIR: %[[VEC_D:.*]] = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["d"]
+
+// LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
+// LLVM: %[[VEC_B:.*]] = alloca <3 x i32>, i64 1, align 16
+// LLVM: %[[VEC_C:.*]] = alloca <2 x i32>, i64 1, align 8
+// LLVM: %[[VEC_D:.*]] = alloca <2 x double>, i64 1, align 16
+
+// OGCG: %[[VEC_A:.*]] = alloca <4 x i32>, align 16
+// OGCG: %[[VEC_B:.*]] = alloca <3 x i32>, align 16
+// OGCG: %[[VEC_C:.*]] = alloca <2 x i32>, align 8
+// OGCG: %[[VEC_D:.*]] = alloca <2 x double>, align 16
+
+void foo2(vi4 p) {}
+
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["p", init]
+// CIR: cir.store %{{.*}}, %[[VEC_A]] : !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>
+
+// LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
+// LLVM: store <4 x i32> %{{.*}}, ptr %[[VEC_A]], align 16
+
+// OGCG: %[[VEC_A:.*]] = alloca <4 x i32>, align 16
+// OGCG: store <4 x i32> %{{.*}}, ptr %[[VEC_A]], align 16
diff --git a/clang/test/CIR/CodeGen/vector.cpp 
b/clang/test/CIR/CodeGen/vector.cpp
new file mode 100644
index 0000000000000..155a00667e9b9
--- /dev/null
+++ b/clang/test/CIR/CodeGen/vector.cpp
@@ -0,0 +1,60 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value 
-fclangir -emit-cir %s -o %t.cir
+// RUN: FileCheck --input-file=%t.cir %s -check-prefix=CIR
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value 
-fclangir -emit-llvm %s -o %t-cir.ll
+// RUN: FileCheck --input-file=%t-cir.ll %s -check-prefix=LLVM
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -Wno-unused-value 
-emit-llvm %s -o %t.ll
+// RUN: FileCheck --input-file=%t.ll %s -check-prefix=OGCG
+
+typedef int vi4 __attribute__((vector_size(16)));
+typedef double vd2 __attribute__((vector_size(16)));
+typedef long long vll2 __attribute__((vector_size(16)));
+
+vi4 vec_a;
+// CIR: cir.global external @[[VEC_A:.*]] = #cir.zero : !cir.vector<!s32i x 4>
+
+// LLVM: @[[VEC_A:.*]] = dso_local global <4 x i32> zeroinitializer
+
+// OGCG: @[[VEC_A:.*]] = global <4 x i32> zeroinitializer
+
+vd2 b;
+// CIR: cir.global external @[[VEC_B:.*]] = #cir.zero : 
!cir.vector<!cir.double x 2>
+
+// LLVM: @[[VEC_B:.*]] = dso_local global <2 x double> zeroinitialize
+
+// OGCG: @[[VEC_B:.*]] = global <2 x double> zeroinitializer
+
+vll2 c;
+// CIR: cir.global external @[[VEC_C:.*]] = #cir.zero : !cir.vector<!s64i x 2>
+
+// LLVM: @[[VEC_C:.*]] = dso_local global <2 x i64> zeroinitialize
+
+// OGCG: @[[VEC_C:.*]] = global <2 x i64> zeroinitializer
+
+void vec_int_test() {
+  vi4 a;
+  vd2 b;
+  vll2 c;
+}
+
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["a"]
+// CIR: %[[VEC_B:.*]] = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["b"]
+// CIR: %[[VEC_C:.*]] = cir.alloca !cir.vector<!s64i x 2>, 
!cir.ptr<!cir.vector<!s64i x 2>>, ["c"]
+
+// LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
+// LLVM: %[[VEC_B:.*]] = alloca <2 x double>, i64 1, align 16
+// LLVM: %[[VEC_C:.*]] = alloca <2 x i64>, i64 1, align 16
+
+// OGCG: %[[VEC_A:.*]] = alloca <4 x i32>, align 16
+// OGCG: %[[VEC_B:.*]] = alloca <2 x double>, align 16
+// OGCG: %[[VEC_C:.*]] = alloca <2 x i64>, align 16
+
+void foo2(vi4 p) {}
+
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["p", init]
+// CIR: cir.store %{{.*}}, %[[VEC_A]] : !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>
+
+// LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
+// LLVM: store <4 x i32> %{{.*}}, ptr %[[VEC_A]], align 16
+
+// OGCG: %[[VEC_A:.*]] = alloca <4 x i32>, align 16
+// OGCG: store <4 x i32> %{{.*}}, ptr %[[VEC_A]], align 16
diff --git a/clang/test/CIR/IR/vector.cir b/clang/test/CIR/IR/vector.cir
new file mode 100644
index 0000000000000..6eb0a269ad5ef
--- /dev/null
+++ b/clang/test/CIR/IR/vector.cir
@@ -0,0 +1,40 @@
+// RUN: cir-opt %s | FileCheck %s
+
+!s32i = !cir.int<s, 32>
+
+module  {
+
+cir.global external @vec_a = #cir.zero : !cir.vector<!s32i x 4>
+// CHECK: cir.global external @vec_a = #cir.zero : !cir.vector<!s32i x 4>
+
+cir.global external @vec_b = #cir.zero : !cir.vector<!s32i x 3>
+// CHECK: cir.global external @vec_b = #cir.zero : !cir.vector<!s32i x 3>
+
+cir.global external @vec_c = #cir.zero : !cir.vector<!s32i x 2>
+// CHECK: cir.global external @vec_c = #cir.zero : !cir.vector<!s32i x 2>
+
+cir.func @vec_int_test() {
+  %0 = cir.alloca !cir.vector<!s32i x 4>, !cir.ptr<!cir.vector<!s32i x 4>>, 
["a"]
+  %1 = cir.alloca !cir.vector<!s32i x 3>, !cir.ptr<!cir.vector<!s32i x 3>>, 
["b"]
+  %2 = cir.alloca !cir.vector<!s32i x 2>, !cir.ptr<!cir.vector<!s32i x 2>>, 
["c"]
+  cir.return
+}
+
+// CHECK: cir.func @vec_int_test() {
+// CHECK:  %0 = cir.alloca !cir.vector<!s32i x 4>, !cir.ptr<!cir.vector<!s32i 
x 4>>, ["a"]
+// CHECK:  %1 = cir.alloca !cir.vector<!s32i x 3>, !cir.ptr<!cir.vector<!s32i 
x 3>>, ["b"]
+// CHECK:  %2 = cir.alloca !cir.vector<!s32i x 2>, !cir.ptr<!cir.vector<!s32i 
x 2>>, ["c"]
+// CHECK:  cir.return
+// CHECK: }
+
+cir.func @vec_double_test() {
+  %0 = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["a"]
+  cir.return
+}
+
+// CHECK: cir.func @vec_double_test() {
+// CHECK:  %0 = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["a"]
+// CHECK:  cir.return
+// CHECK: }
+
+}

>From a7834c7060c40b5f50d2970fc31395a62ad43581 Mon Sep 17 00:00:00 2001
From: AmrDeveloper <am...@programmer.net>
Date: Mon, 21 Apr 2025 13:13:19 +0200
Subject: [PATCH 2/2] Address code review comment

---
 .../include/clang/CIR/Dialect/IR/CIRTypes.td  | 23 +++++++++++++--
 clang/lib/CIR/CodeGen/CIRGenTypes.cpp         |  3 +-
 clang/lib/CIR/Dialect/IR/CIRTypes.cpp         | 19 +++++++++++++
 clang/test/CIR/CodeGen/vector-ext.cpp         | 20 ++++++-------
 clang/test/CIR/CodeGen/vector.cpp             | 16 +++++------
 clang/test/CIR/IR/vector.cir                  | 28 +++++++++----------
 6 files changed, 72 insertions(+), 37 deletions(-)

diff --git a/clang/include/clang/CIR/Dialect/IR/CIRTypes.td 
b/clang/include/clang/CIR/Dialect/IR/CIRTypes.td
index 8fb46cea618a3..e85f98c23613a 100644
--- a/clang/include/clang/CIR/Dialect/IR/CIRTypes.td
+++ b/clang/include/clang/CIR/Dialect/IR/CIRTypes.td
@@ -316,15 +316,32 @@ def CIR_VectorType : CIR_Type<"Vector", "vector",
 
   let summary = "CIR vector type";
   let description = [{
-    `cir.vector' represents fixed-size vector types.  The parameters are the
-    element type and the number of elements.
+   `!cir.vector' represents fixed-size vector types, parameterized
+    by the element type and the number of elements.
+
+    Example:
+
+    ```mlir
+    !cir.vector<!u64i x 2>
+    !cir.vector<!cir.float x 4>
+    ```
   }];
 
   let parameters = (ins "mlir::Type":$eltType, "uint64_t":$size);
 
   let assemblyFormat = [{
-    `<` $eltType `x` $size `>`
+    `<` $size `x` $eltType `>`
   }];
+
+  let builders = [
+    TypeBuilderWithInferredContext<(ins
+      "mlir::Type":$eltType, "uint64_t":$size
+    ), [{
+        return $_get(eltType.getContext(), eltType, size);
+    }]>,
+  ];
+
+  let genVerifyDecl = 1;
 }
 
 
//===----------------------------------------------------------------------===//
diff --git a/clang/lib/CIR/CodeGen/CIRGenTypes.cpp 
b/clang/lib/CIR/CodeGen/CIRGenTypes.cpp
index 01e8f3576fbe3..fb5434123ca6b 100644
--- a/clang/lib/CIR/CodeGen/CIRGenTypes.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenTypes.cpp
@@ -403,8 +403,7 @@ mlir::Type CIRGenTypes::convertType(QualType type) {
   case Type::Vector: {
     const VectorType *vec = cast<VectorType>(ty);
     const mlir::Type elemTy = convertTypeForMem(vec->getElementType());
-    resultType = cir::VectorType::get(builder.getContext(), elemTy,
-                                      vec->getNumElements());
+    resultType = cir::VectorType::get(elemTy, vec->getNumElements());
     break;
   }
 
diff --git a/clang/lib/CIR/Dialect/IR/CIRTypes.cpp 
b/clang/lib/CIR/Dialect/IR/CIRTypes.cpp
index f4ec524b65129..f085c33c3d78d 100644
--- a/clang/lib/CIR/Dialect/IR/CIRTypes.cpp
+++ b/clang/lib/CIR/Dialect/IR/CIRTypes.cpp
@@ -654,6 +654,25 @@ cir::VectorType::getABIAlignment(const ::mlir::DataLayout 
&dataLayout,
   return llvm::NextPowerOf2(dataLayout.getTypeSizeInBits(*this));
 }
 
+mlir::LogicalResult cir::VectorType::verify(
+    llvm::function_ref<mlir::InFlightDiagnostic()> emitError,
+    mlir::Type eltType, uint64_t size) {
+  if (size == 0)
+    return emitError() << "the number of vector elements must be positive";
+
+  // Check if it a valid FixedVectorType
+  if (mlir::isa<cir::PointerType, cir::FP128Type>(eltType))
+    return success();
+
+  // Check if it a valid VectorType
+  if (mlir::isa<cir::IntType>(eltType) || isAnyFloatingPointType(eltType))
+    return success();
+
+  eltType.dump();
+  return emitError() << "expected LLVM-compatible fixed-vector type "
+                        "to be either builtin or LLVM dialect type";
+}
+
 
//===----------------------------------------------------------------------===//
 // PointerType Definitions
 
//===----------------------------------------------------------------------===//
diff --git a/clang/test/CIR/CodeGen/vector-ext.cpp 
b/clang/test/CIR/CodeGen/vector-ext.cpp
index 9c3fdb0b9c31b..13726edf3d259 100644
--- a/clang/test/CIR/CodeGen/vector-ext.cpp
+++ b/clang/test/CIR/CodeGen/vector-ext.cpp
@@ -11,21 +11,21 @@ typedef int vi2 __attribute__((ext_vector_type(2)));
 typedef double vd2 __attribute__((ext_vector_type(2)));
 
 vi4 vec_a;
-// CIR: cir.global external @[[VEC_A:.*]] = #cir.zero : !cir.vector<!s32i x 4>
+// CIR: cir.global external @[[VEC_A:.*]] = #cir.zero : !cir.vector<4 x !s32i>
 
 // LLVM: @[[VEC_A:.*]] = dso_local global <4 x i32> zeroinitializer
 
 // OGCG: @[[VEC_A:.*]] = global <4 x i32> zeroinitializer
 
 vi3 vec_b;
-// CIR: cir.global external @[[VEC_B:.*]] = #cir.zero : !cir.vector<!s32i x 3>
+// CIR: cir.global external @[[VEC_B:.*]] = #cir.zero : !cir.vector<3 x !s32i>
 
 // LLVM: @[[VEC_B:.*]] = dso_local global <3 x i32> zeroinitializer
 
 // OGCG: @[[VEC_B:.*]] = global <3 x i32> zeroinitializer
 
 vi2 vec_c;
-// CIR: cir.global external @[[VEC_C:.*]] = #cir.zero : !cir.vector<!s32i x 2>
+// CIR: cir.global external @[[VEC_C:.*]] = #cir.zero : !cir.vector<2 x !s32i>
 
 // LLVM: @[[VEC_C:.*]] = dso_local global <2 x i32> zeroinitializer
 
@@ -33,7 +33,7 @@ vi2 vec_c;
 
 vd2 d;
 
-// CIR: cir.global external @[[VEC_D:.*]] = #cir.zero : 
!cir.vector<!cir.double x 2>
+// CIR: cir.global external @[[VEC_D:.*]] = #cir.zero : !cir.vector<2 x 
!cir.double>
 
 // LLVM: @[[VEC_D:.*]] = dso_local global <2 x double> zeroinitialize
 
@@ -46,10 +46,10 @@ void foo() {
   vd2 d;
 }
 
-// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["a"]
-// CIR: %[[VEC_B:.*]] = cir.alloca !cir.vector<!s32i x 3>, 
!cir.ptr<!cir.vector<!s32i x 3>>, ["b"]
-// CIR: %[[VEC_C:.*]] = cir.alloca !cir.vector<!s32i x 2>, 
!cir.ptr<!cir.vector<!s32i x 2>>, ["c"]
-// CIR: %[[VEC_D:.*]] = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["d"]
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<4 x !s32i>, 
!cir.ptr<!cir.vector<4 x !s32i>>, ["a"]
+// CIR: %[[VEC_B:.*]] = cir.alloca !cir.vector<3 x !s32i>, 
!cir.ptr<!cir.vector<3 x !s32i>>, ["b"]
+// CIR: %[[VEC_C:.*]] = cir.alloca !cir.vector<2 x !s32i>, 
!cir.ptr<!cir.vector<2 x !s32i>>, ["c"]
+// CIR: %[[VEC_D:.*]] = cir.alloca !cir.vector<2 x !cir.double>, 
!cir.ptr<!cir.vector<2 x !cir.double>>, ["d"]
 
 // LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
 // LLVM: %[[VEC_B:.*]] = alloca <3 x i32>, i64 1, align 16
@@ -63,8 +63,8 @@ void foo() {
 
 void foo2(vi4 p) {}
 
-// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["p", init]
-// CIR: cir.store %{{.*}}, %[[VEC_A]] : !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<4 x !s32i>, 
!cir.ptr<!cir.vector<4 x !s32i>>, ["p", init]
+// CIR: cir.store %{{.*}}, %[[VEC_A]] : !cir.vector<4 x !s32i>, 
!cir.ptr<!cir.vector<4 x !s32i>>
 
 // LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
 // LLVM: store <4 x i32> %{{.*}}, ptr %[[VEC_A]], align 16
diff --git a/clang/test/CIR/CodeGen/vector.cpp 
b/clang/test/CIR/CodeGen/vector.cpp
index 155a00667e9b9..8f9e98fb6b3c0 100644
--- a/clang/test/CIR/CodeGen/vector.cpp
+++ b/clang/test/CIR/CodeGen/vector.cpp
@@ -10,21 +10,21 @@ typedef double vd2 __attribute__((vector_size(16)));
 typedef long long vll2 __attribute__((vector_size(16)));
 
 vi4 vec_a;
-// CIR: cir.global external @[[VEC_A:.*]] = #cir.zero : !cir.vector<!s32i x 4>
+// CIR: cir.global external @[[VEC_A:.*]] = #cir.zero : !cir.vector<4 x !s32i>
 
 // LLVM: @[[VEC_A:.*]] = dso_local global <4 x i32> zeroinitializer
 
 // OGCG: @[[VEC_A:.*]] = global <4 x i32> zeroinitializer
 
 vd2 b;
-// CIR: cir.global external @[[VEC_B:.*]] = #cir.zero : 
!cir.vector<!cir.double x 2>
+// CIR: cir.global external @[[VEC_B:.*]] = #cir.zero : !cir.vector<2 x 
!cir.double>
 
 // LLVM: @[[VEC_B:.*]] = dso_local global <2 x double> zeroinitialize
 
 // OGCG: @[[VEC_B:.*]] = global <2 x double> zeroinitializer
 
 vll2 c;
-// CIR: cir.global external @[[VEC_C:.*]] = #cir.zero : !cir.vector<!s64i x 2>
+// CIR: cir.global external @[[VEC_C:.*]] = #cir.zero : !cir.vector<2 x !s64i>
 
 // LLVM: @[[VEC_C:.*]] = dso_local global <2 x i64> zeroinitialize
 
@@ -36,9 +36,9 @@ void vec_int_test() {
   vll2 c;
 }
 
-// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["a"]
-// CIR: %[[VEC_B:.*]] = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["b"]
-// CIR: %[[VEC_C:.*]] = cir.alloca !cir.vector<!s64i x 2>, 
!cir.ptr<!cir.vector<!s64i x 2>>, ["c"]
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<4 x !s32i>, 
!cir.ptr<!cir.vector<4 x !s32i>>, ["a"]
+// CIR: %[[VEC_B:.*]] = cir.alloca !cir.vector<2 x !cir.double>, 
!cir.ptr<!cir.vector<2 x !cir.double>>, ["b"]
+// CIR: %[[VEC_C:.*]] = cir.alloca !cir.vector<2 x !s64i>, 
!cir.ptr<!cir.vector<2 x !s64i>>, ["c"]
 
 // LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
 // LLVM: %[[VEC_B:.*]] = alloca <2 x double>, i64 1, align 16
@@ -50,8 +50,8 @@ void vec_int_test() {
 
 void foo2(vi4 p) {}
 
-// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>, ["p", init]
-// CIR: cir.store %{{.*}}, %[[VEC_A]] : !cir.vector<!s32i x 4>, 
!cir.ptr<!cir.vector<!s32i x 4>>
+// CIR: %[[VEC_A:.*]] = cir.alloca !cir.vector<4 x !s32i>, 
!cir.ptr<!cir.vector<4 x !s32i>>, ["p", init]
+// CIR: cir.store %{{.*}}, %[[VEC_A]] : !cir.vector<4 x !s32i>, 
!cir.ptr<!cir.vector<4 x !s32i>>
 
 // LLVM: %[[VEC_A:.*]] = alloca <4 x i32>, i64 1, align 16
 // LLVM: store <4 x i32> %{{.*}}, ptr %[[VEC_A]], align 16
diff --git a/clang/test/CIR/IR/vector.cir b/clang/test/CIR/IR/vector.cir
index 6eb0a269ad5ef..74ddf7691e7d4 100644
--- a/clang/test/CIR/IR/vector.cir
+++ b/clang/test/CIR/IR/vector.cir
@@ -4,36 +4,36 @@
 
 module  {
 
-cir.global external @vec_a = #cir.zero : !cir.vector<!s32i x 4>
-// CHECK: cir.global external @vec_a = #cir.zero : !cir.vector<!s32i x 4>
+cir.global external @vec_a = #cir.zero : !cir.vector<4 x !s32i>
+// CHECK: cir.global external @vec_a = #cir.zero : !cir.vector<4 x !s32i>
 
-cir.global external @vec_b = #cir.zero : !cir.vector<!s32i x 3>
-// CHECK: cir.global external @vec_b = #cir.zero : !cir.vector<!s32i x 3>
+cir.global external @vec_b = #cir.zero : !cir.vector<3 x !s32i>
+// CHECK: cir.global external @vec_b = #cir.zero : !cir.vector<3 x !s32i>
 
-cir.global external @vec_c = #cir.zero : !cir.vector<!s32i x 2>
-// CHECK: cir.global external @vec_c = #cir.zero : !cir.vector<!s32i x 2>
+cir.global external @vec_c = #cir.zero : !cir.vector<2 x !s32i>
+// CHECK: cir.global external @vec_c = #cir.zero : !cir.vector<2 x !s32i>
 
 cir.func @vec_int_test() {
-  %0 = cir.alloca !cir.vector<!s32i x 4>, !cir.ptr<!cir.vector<!s32i x 4>>, 
["a"]
-  %1 = cir.alloca !cir.vector<!s32i x 3>, !cir.ptr<!cir.vector<!s32i x 3>>, 
["b"]
-  %2 = cir.alloca !cir.vector<!s32i x 2>, !cir.ptr<!cir.vector<!s32i x 2>>, 
["c"]
+  %0 = cir.alloca !cir.vector<4 x !s32i>, !cir.ptr<!cir.vector<4 x !s32i>>, 
["a"]
+  %1 = cir.alloca !cir.vector<3 x !s32i>, !cir.ptr<!cir.vector<3 x !s32i>>, 
["b"]
+  %2 = cir.alloca !cir.vector<2 x !s32i>, !cir.ptr<!cir.vector<2 x !s32i>>, 
["c"]
   cir.return
 }
 
 // CHECK: cir.func @vec_int_test() {
-// CHECK:  %0 = cir.alloca !cir.vector<!s32i x 4>, !cir.ptr<!cir.vector<!s32i 
x 4>>, ["a"]
-// CHECK:  %1 = cir.alloca !cir.vector<!s32i x 3>, !cir.ptr<!cir.vector<!s32i 
x 3>>, ["b"]
-// CHECK:  %2 = cir.alloca !cir.vector<!s32i x 2>, !cir.ptr<!cir.vector<!s32i 
x 2>>, ["c"]
+// CHECK:  %0 = cir.alloca !cir.vector<4 x !s32i>, !cir.ptr<!cir.vector<4 x 
!s32i>>, ["a"]
+// CHECK:  %1 = cir.alloca !cir.vector<3 x !s32i>, !cir.ptr<!cir.vector<3 x 
!s32i>>, ["b"]
+// CHECK:  %2 = cir.alloca !cir.vector<2 x !s32i>, !cir.ptr<!cir.vector<2 x 
!s32i>>, ["c"]
 // CHECK:  cir.return
 // CHECK: }
 
 cir.func @vec_double_test() {
-  %0 = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["a"]
+  %0 = cir.alloca !cir.vector<2 x !cir.double>, !cir.ptr<!cir.vector<2 x 
!cir.double>>, ["a"]
   cir.return
 }
 
 // CHECK: cir.func @vec_double_test() {
-// CHECK:  %0 = cir.alloca !cir.vector<!cir.double x 2>, 
!cir.ptr<!cir.vector<!cir.double x 2>>, ["a"]
+// CHECK:  %0 = cir.alloca !cir.vector<2 x !cir.double>, 
!cir.ptr<!cir.vector<2 x !cir.double>>, ["a"]
 // CHECK:  cir.return
 // CHECK: }
 

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