AMDGPU: add __builtin_amdgcn_update_dpp

Emit llvm.amdgcn.update.dpp for both __builtin_amdgcn_mov_dpp and
__builtin_amdgcn_update_dpp. The first argument to
llvm.amdgcn.update.dpp will be undef for __builtin_amdgcn_mov_dpp.

Differential Revision: https://reviews.llvm.org/D52320

llvm-svn: 344665

clang/include/clang/Basic/BuiltinsAMDGPU.def

@@ -122,6 +122,7 @@ TARGET_BUILTIN(__builtin_amdgcn_fracth, "hh", "nc", "16-bit-insts")
 TARGET_BUILTIN(__builtin_amdgcn_classh, "bhi", "nc", "16-bit-insts")
 TARGET_BUILTIN(__builtin_amdgcn_s_memrealtime, "LUi", "n", "s-memrealtime")
 TARGET_BUILTIN(__builtin_amdgcn_mov_dpp, "iiIiIiIiIb", "nc", "dpp")
+TARGET_BUILTIN(__builtin_amdgcn_update_dpp, "iiiIiIiIiIb", "nc", "dpp")
 TARGET_BUILTIN(__builtin_amdgcn_s_dcache_wb, "v", "n", "vi-insts")
 
 //===----------------------------------------------------------------------===//

clang/lib/CodeGen/CGBuiltin.cpp

@@ -11347,12 +11347,16 @@ Value *CodeGenFunction::EmitAMDGPUBuiltinExpr(unsigned BuiltinID,
 
   case AMDGPU::BI__builtin_amdgcn_ds_swizzle:
     return emitBinaryBuiltin(*this, E, Intrinsic::amdgcn_ds_swizzle);
-  case AMDGPU::BI__builtin_amdgcn_mov_dpp: {
-    llvm::SmallVector<llvm::Value *, 5> Args;
-    for (unsigned I = 0; I != 5; ++I)
+  case AMDGPU::BI__builtin_amdgcn_mov_dpp:
+  case AMDGPU::BI__builtin_amdgcn_update_dpp: {
+    llvm::SmallVector<llvm::Value *, 6> Args;
+    for (unsigned I = 0; I != E->getNumArgs(); ++I)
       Args.push_back(EmitScalarExpr(E->getArg(I)));
-    Value *F = CGM.getIntrinsic(Intrinsic::amdgcn_mov_dpp,
-                                    Args[0]->getType());
+    assert(Args.size() == 5 || Args.size() == 6);
+    if (Args.size() == 5)
+      Args.insert(Args.begin(), llvm::UndefValue::get(Args[0]->getType()));
+    Value *F =
+        CGM.getIntrinsic(Intrinsic::amdgcn_update_dpp, Args[0]->getType());
     return Builder.CreateCall(F, Args);
   }
   case AMDGPU::BI__builtin_amdgcn_div_fixup:

clang/test/CodeGenOpenCL/builtins-amdgcn-vi.cl

@@ -90,12 +90,19 @@ void test_s_dcache_wb()
 }
 
 // CHECK-LABEL: @test_mov_dpp
-// CHECK: call i32 @llvm.amdgcn.mov.dpp.i32(i32 %src, i32 0, i32 0, i32 0, i1 false)
+// CHECK: call i32 @llvm.amdgcn.update.dpp.i32(i32 undef, i32 %src, i32 0, i32 0, i32 0, i1 false)
 void test_mov_dpp(global int* out, int src)
 {
   *out = __builtin_amdgcn_mov_dpp(src, 0, 0, 0, false);
 }
 
+// CHECK-LABEL: @test_update_dpp
+// CHECK: call i32 @llvm.amdgcn.update.dpp.i32(i32 %arg1, i32 %arg2, i32 0, i32 0, i32 0, i1 false)
+void test_update_dpp(global int* out, int arg1, int arg2)
+{
+  *out = __builtin_amdgcn_update_dpp(arg1, arg2, 0, 0, 0, false);
+}
+
 // CHECK-LABEL: @test_ds_fadd
 // CHECK: call float @llvm.amdgcn.ds.fadd(float addrspace(3)* %out, float %src, i32 0, i32 0, i1 false)
 void test_ds_faddf(local float *out, float src) {

clang/test/SemaOpenCL/builtins-amdgcn-error.cl

@@ -102,6 +102,15 @@ void test_mov_dpp2(global int* out, int a, int b, int c, int d, bool e)
   *out = __builtin_amdgcn_mov_dpp(a, 0, 0, 0, e); // expected-error {{argument to '__builtin_amdgcn_mov_dpp' must be a constant integer}}
 }
 
+void test_update_dpp2(global int* out, int a, int b, int c, int d, int e, bool f)
+{
+  *out = __builtin_amdgcn_update_dpp(a, b, 0, 0, 0, false);
+  *out = __builtin_amdgcn_update_dpp(a, 0, c, 0, 0, false); // expected-error {{argument to '__builtin_amdgcn_update_dpp' must be a constant integer}}
+  *out = __builtin_amdgcn_update_dpp(a, 0, 0, d, 0, false); // expected-error {{argument to '__builtin_amdgcn_update_dpp' must be a constant integer}}
+  *out = __builtin_amdgcn_update_dpp(a, 0, 0, 0, e, false); // expected-error {{argument to '__builtin_amdgcn_update_dpp' must be a constant integer}}
+  *out = __builtin_amdgcn_update_dpp(a, 0, 0, 0, 0, f); // expected-error {{argument to '__builtin_amdgcn_update_dpp' must be a constant integer}}
+}
+
 void test_ds_faddf(local float *out, float src, int a) {
   *out = __builtin_amdgcn_ds_faddf(out, src, a, 0, false); // expected-error {{argument to '__builtin_amdgcn_ds_faddf' must be a constant integer}}
   *out = __builtin_amdgcn_ds_faddf(out, src, 0, a, false); // expected-error {{argument to '__builtin_amdgcn_ds_faddf' must be a constant integer}}