[PATCH] D51722: [OpenCL] Allow blocks to capture arrays in OpenCL

[Andrew Savonichev via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL342370: [OpenCL] Allow blocks to capture arrays in OpenCL (authored by asavonic, committed by ).
Herald added a subscriber: llvm-commits.

Changed prior to commit:
  https://reviews.llvm.org/D51722?vs=164214&id=165740#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D51722

Files:
  cfe/trunk/lib/Sema/SemaExpr.cpp
  cfe/trunk/test/SemaOpenCL/block-array-capturing.cl


Index: cfe/trunk/test/SemaOpenCL/block-array-capturing.cl
===================================================================
--- cfe/trunk/test/SemaOpenCL/block-array-capturing.cl
+++ cfe/trunk/test/SemaOpenCL/block-array-capturing.cl
@@ -0,0 +1,16 @@
+// RUN: %clang_cc1 -O0 -cl-std=CL2.0 -triple spir64-unkown-unkown -emit-llvm %s -o -| FileCheck %s
+// expected-no-diagnostics
+
+typedef int (^block_t)();
+
+int block_typedef_kernel(global int* res) {
+  // CHECK: %{{.*}} = alloca <{ i32, i32, [3 x i32] }>
+  int a[3] = {1, 2, 3};
+  // CHECK: call void @llvm.memcpy{{.*}}
+  block_t b = ^() { return a[0]; };
+  return b();
+}
+
+// CHECK: define {{.*}} @__block_typedef_kernel_block_invoke
+// CHECK: %{{.*}} = getelementptr inbounds [3 x i32], [3 x i32] addrspace(4)* %{{.*}}, i64 0, i64 0
+// CHECK-NOT: call void @llvm.memcpy{{.*}}
Index: cfe/trunk/lib/Sema/SemaExpr.cpp
===================================================================
--- cfe/trunk/lib/Sema/SemaExpr.cpp
+++ cfe/trunk/lib/Sema/SemaExpr.cpp
@@ -14627,8 +14627,10 @@
   Expr *CopyExpr = nullptr;
   bool ByRef = false;
 
-  // Blocks are not allowed to capture arrays.
-  if (CaptureType->isArrayType()) {
+  // Blocks are not allowed to capture arrays, excepting OpenCL.
+  // OpenCL v2.0 s1.12.5 (revision 40): arrays are captured by reference
+  // (decayed to pointers).
+  if (!S.getLangOpts().OpenCL && CaptureType->isArrayType()) {
     if (BuildAndDiagnose) {
       S.Diag(Loc, diag::err_ref_array_type);
       S.Diag(Var->getLocation(), diag::note_previous_decl)


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