[clang] [CIR]Upstream support for IITDescriptor::Pointer and Vector types (PR #182112)

[Priyanshu Kumar via cfe-commits]

https://github.com/Priyanshu3820 updated https://github.com/llvm/llvm-project/pull/182112

>From 5a6d5820d0fa6a7a300b527b7cfae1d57a6a9936 Mon Sep 17 00:00:00 2001
From: Priyanshu <10b.priyanshu at gmail.com>
Date: Thu, 19 Feb 2026 01:21:27 +0530
Subject: [PATCH 1/2] Upstream support for IITDescriptor::Pointer and Vector
 types

---
 clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp | 11 ++++++++++
 clang/test/CIR/CodeGen/builtins-x86.c   | 27 +++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp b/clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp
index 87c50585c1afb..049708c0603f9 100644
--- a/clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp
@@ -817,6 +817,17 @@ decodeFixedType(CIRGenFunction &cgf,
   case IITDescriptor::Integer:
     return cir::IntType::get(context, descriptor.Integer_Width,
                              /*isSigned=*/true);
+  case IITDescriptor::Vector: {
+    mlir::Type elementType = decodeFixedType(cgf, infos, context);
+    unsigned numElements = descriptor.Vector_Width.getFixedValue();
+    return cir::VectorType::get(elementType, numElements);
+  }
+  case IITDescriptor::Pointer: {
+    mlir::Builder builder(context);
+    auto addrSpace = cir::TargetAddressSpaceAttr::get(
+        context, builder.getUI32IntegerAttr(descriptor.Pointer_AddressSpace));
+    return cir::PointerType::get(cir::VoidType::get(context), addrSpace);
+  }
   default:
     cgf.cgm.errorNYI("Unimplemented intrinsic type descriptor");
     return cir::VoidType::get(context);
diff --git a/clang/test/CIR/CodeGen/builtins-x86.c b/clang/test/CIR/CodeGen/builtins-x86.c
index e03cd64e063dc..6c38b02609ed6 100644
--- a/clang/test/CIR/CodeGen/builtins-x86.c
+++ b/clang/test/CIR/CodeGen/builtins-x86.c
@@ -40,3 +40,30 @@ void test_pause(void) {
   // OGCG: call void @llvm.x86.sse2.pause()
   __builtin_ia32_pause();
 }
+
+void test_clflush(void* a){
+  // CIR-LABEL: test_clflush
+  // CIR: cir.call_llvm_intrinsic "x86.sse2.clflush" %{{.*}} : (!cir.ptr<!void, target_address_space(0)>) -> !void
+  
+  // LLVM-LABEL: @test_clflush
+  // LLVM: call void @llvm.x86.sse2.clflush(ptr {{.*}})
+
+  // OGCG-LABEL: @test_clflush
+  // OGCG: call void @llvm.x86.sse2.clflush(ptr {{.*}})
+  __builtin_ia32_clflush(a);
+}
+
+typedef float v4f __attribute__((vector_size(16)));
+typedef int   v4i __attribute__((vector_size(16)));
+
+v4i test_convertvector(v4f a) {
+  // CIR-LABEL: test_convertvector
+  // CIR: cir.cast float_to_int %{{.*}} : !cir.vector<4 x !cir.float> -> !cir.vector<4 x !s32i>
+
+  // LLVM-LABEL: @test_convertvector
+  // LLVM: fptosi <4 x float> %{{.*}} to <4 x i32>
+
+  // OGCG-LABEL: @test_convertvector
+  // OGCG: fptosi <4 x float> %{{.*}} to <4 x i32>
+  return __builtin_convertvector(a, v4i);
+}
\ No newline at end of file

>From ed23c90210172e858b1f33a7612fbe22acc1f50b Mon Sep 17 00:00:00 2001
From: Priyanshu <10b.priyanshu at gmail.com>
Date: Thu, 19 Feb 2026 09:39:27 +0530
Subject: [PATCH 2/2] Add newline

---
 clang/test/CIR/CodeGen/builtins-x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/test/CIR/CodeGen/builtins-x86.c b/clang/test/CIR/CodeGen/builtins-x86.c
index 6c38b02609ed6..e56794b566192 100644
--- a/clang/test/CIR/CodeGen/builtins-x86.c
+++ b/clang/test/CIR/CodeGen/builtins-x86.c
@@ -66,4 +66,4 @@ v4i test_convertvector(v4f a) {
   // OGCG-LABEL: @test_convertvector
   // OGCG: fptosi <4 x float> %{{.*}} to <4 x i32>
   return __builtin_convertvector(a, v4i);
-}
\ No newline at end of file
+}