Add the intrinsic __builtin_convertvector
LLVM supports applying conversion instructions to vectors of the same number of
elements (fptrunc, fptosi, etc.) but there had been no way for a Clang user to
cause such instructions to be generated when using builtin vector types.
C-style casting on vectors is already defined in terms of bitcasts, and so
cannot be used for these conversions as well (without leading to a very
confusing set of semantics). As a result, this adds a __builtin_convertvector
intrinsic (patterned after the OpenCL __builtin_astype intrinsic). This is
intended to aid the creation of vector intrinsic headers that create generic IR
instead of target-dependent intrinsics (in other words, this is a generic
_mm_cvtepi32_ps). As noted in the documentation, the action of
__builtin_convertvector is defined in terms of the action of a C-style cast on
each vector element.
llvm-svn: 190915
diff --git a/clang/lib/Serialization/ASTReaderStmt.cpp b/clang/lib/Serialization/ASTReaderStmt.cpp
index 35df252..23cd9cc 100644
--- a/clang/lib/Serialization/ASTReaderStmt.cpp
+++ b/clang/lib/Serialization/ASTReaderStmt.cpp
@@ -854,6 +854,14 @@
E->setRParenLoc(ReadSourceLocation(Record, Idx));
}
+void ASTStmtReader::VisitConvertVectorExpr(ConvertVectorExpr *E) {
+ VisitExpr(E);
+ E->BuiltinLoc = ReadSourceLocation(Record, Idx);
+ E->RParenLoc = ReadSourceLocation(Record, Idx);
+ E->TInfo = GetTypeSourceInfo(Record, Idx);
+ E->SrcExpr = Reader.ReadSubExpr();
+}
+
void ASTStmtReader::VisitBlockExpr(BlockExpr *E) {
VisitExpr(E);
E->setBlockDecl(ReadDeclAs<BlockDecl>(Record, Idx));
@@ -2104,6 +2112,10 @@
S = new (Context) ShuffleVectorExpr(Empty);
break;
+ case EXPR_CONVERT_VECTOR:
+ S = new (Context) ConvertVectorExpr(Empty);
+ break;
+
case EXPR_BLOCK:
S = new (Context) BlockExpr(Empty);
break;