Basic, Sema: add support for CUDA launch_bounds attribute

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@121654 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index ec88da13b4a558af69105c36100a5065a1b38e9f..afd476372a04be6e12beb26e7ef25813e97b3364 100644 (file)
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -190,6 +190,11 @@ def CUDAHost : Attr {
   let Spellings = ["host"];
 }
 
+def CUDALaunchBounds : Attr {
+  let Spellings = ["launch_bounds"];
+  let Args = [IntArgument<"MaxThreads">, DefaultIntArgument<"MinBlocks", 0>];
+}
+
 def CUDAShared : Attr {
   let Spellings = ["shared"];
 }

diff --git a/include/clang/Sema/AttributeList.h b/include/clang/Sema/AttributeList.h
index c02ea5ef132edf473e601a34efb3e8baf9f33e01..d524861287586f730cfe9a5258e959bd824eba88 100644 (file)
--- a/include/clang/Sema/AttributeList.h
+++ b/include/clang/Sema/AttributeList.h
@@ -109,6 +109,7 @@ public:
     AT_gnu_inline,
     AT_hiding,
     AT_host,
+    AT_launch_bounds,
     AT_malloc,
     AT_may_alias,
     AT_mode,

diff --git a/lib/Sema/AttributeList.cpp b/lib/Sema/AttributeList.cpp
index b2ceb53cc534aeb0d13224c02c1693a577d1de21..789c17b7f0a6a608b675cb7ce0d74e141eb0d3ac 100644 (file)
--- a/lib/Sema/AttributeList.cpp
+++ b/lib/Sema/AttributeList.cpp
@@ -130,6 +130,7 @@ AttributeList::Kind AttributeList::getKind(const IdentifierInfo *Name) {
     .Case("global", AT_global)
     .Case("host", AT_host)
     .Case("shared", AT_shared)
+    .Case("launch_bounds", AT_launch_bounds)
     .Case("common", AT_common)
     .Case("nocommon", AT_nocommon)
     .Default(UnknownAttribute);

diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index a2a7fdcdd5392505704c5227ad34a39e1676bb49..8a88ae5f571f6cb8756f43f60b3a9172f6a36624 100644 (file)
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -2316,6 +2316,51 @@ static void HandleRegparmAttr(Decl *d, const AttributeList &Attr, Sema &S) {
                                            NumParams.getZExtValue()));
 }
 
+static void HandleLaunchBoundsAttr(Decl *d, const AttributeList &Attr, Sema &S){
+  if (S.LangOpts.CUDA) {
+    // check the attribute arguments.
+    if (Attr.getNumArgs() != 1 && Attr.getNumArgs() != 2) {
+      S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments)
+        << "1 or 2";
+      return;
+    }
+
+    if (!isFunctionOrMethod(d)) {
+      S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
+      << Attr.getName() << 0 /*function*/;
+      return;
+    }
+
+    Expr *MaxThreadsExpr = Attr.getArg(0);
+    llvm::APSInt MaxThreads(32);
+    if (MaxThreadsExpr->isTypeDependent() ||
+        MaxThreadsExpr->isValueDependent() ||
+        !MaxThreadsExpr->isIntegerConstantExpr(MaxThreads, S.Context)) {
+      S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
+        << "launch_bounds" << 1 << MaxThreadsExpr->getSourceRange();
+      return;
+    }
+
+    llvm::APSInt MinBlocks(32);
+    if (Attr.getNumArgs() > 1) {
+      Expr *MinBlocksExpr = Attr.getArg(1);
+      if (MinBlocksExpr->isTypeDependent() ||
+          MinBlocksExpr->isValueDependent() ||
+          !MinBlocksExpr->isIntegerConstantExpr(MinBlocks, S.Context)) {
+        S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_int)
+          << "launch_bounds" << 2 << MinBlocksExpr->getSourceRange();
+        return;
+      }
+    }
+
+    d->addAttr(::new (S.Context) CUDALaunchBoundsAttr(Attr.getLoc(), S.Context,
+                                                      MaxThreads.getZExtValue(),
+                                                     MinBlocks.getZExtValue()));
+  } else {
+    S.Diag(Attr.getLoc(), diag::warn_attribute_ignored) << "launch_bounds";
+  }
+}
+
 static void HandleFinalAttr(Decl *d, const AttributeList &Attr, Sema &S) {
   // check the attribute arguments.
   if (Attr.getNumArgs() != 0) {
@@ -2529,6 +2574,9 @@ static void ProcessDeclAttribute(Scope *scope, Decl *D,
   case AttributeList::AT_gnu_inline:  HandleGNUInlineAttr   (D, Attr, S); break;
   case AttributeList::AT_hiding:      HandleHidingAttr      (D, Attr, S); break;
   case AttributeList::AT_host:        HandleHostAttr        (D, Attr, S); break;
+  case AttributeList::AT_launch_bounds:
+    HandleLaunchBoundsAttr(D, Attr, S);
+    break;
   case AttributeList::AT_mode:        HandleModeAttr        (D, Attr, S); break;
   case AttributeList::AT_malloc:      HandleMallocAttr      (D, Attr, S); break;
   case AttributeList::AT_may_alias:   HandleMayAliasAttr    (D, Attr, S); break;