[mlir][LLVM] Allow call_intrinsic to inline (#70940)

LLVM::CallIntrinsicOp was previously overlooked from the
isLegalToInline.

Author: nicolasvasilache

mlir/lib/Dialect/LLVMIR/IR/LLVMInlining.cpp

@@ -694,6 +694,7 @@ struct LLVMInlinerInterface : public DialectInlinerInterface {
             LLVM::AtomicRMWOp,
             LLVM::AtomicCmpXchgOp,
             LLVM::CallOp,
+            LLVM::CallIntrinsicOp,
             LLVM::DbgDeclareOp,
             LLVM::DbgLabelOp,
             LLVM::DbgValueOp,

mlir/test/Dialect/LLVMIR/inlining.mlir

@@ -28,6 +28,7 @@ func.func @inner_func_inlinable(%ptr : !llvm.ptr) -> i32 {
   llvm.unreachable
 ^bb2:
   llvm.intr.stackrestore %stack : !llvm.ptr
+  llvm.call_intrinsic "llvm.x86.sse41.round.ss"() : () -> (vector<8xf32>)
   return %1 : i32
 }
 
@@ -50,6 +51,7 @@ func.func @inner_func_inlinable(%ptr : !llvm.ptr) -> i32 {
 // CHECK: llvm.inline_asm has_side_effects "foo", "bar"
 // CHECK: llvm.unreachable
 // CHECK: llvm.intr.stackrestore %[[STACK]]
+// CHECK: llvm.call_intrinsic "llvm.x86.sse41.round.ss"(
 func.func @test_inline(%ptr : !llvm.ptr) -> i32 {
   %0 = call @inner_func_inlinable(%ptr) : (!llvm.ptr) -> i32
   return %0 : i32