[Bugfix] Fix ICE on constexpr vector splat.

In {CG,}ExprConstant.cpp, we weren't treating vector splats properly.
This patch makes us treat splats more properly.

Additionally, this patch adds a new cast kind which allows a bool->int
cast to result in -1 or 0, instead of 1 or 0 (for true and false,
respectively), so we can sanely model OpenCL bool->int casts in the AST.

Differential Revision: http://reviews.llvm.org/D14877

llvm-svn: 257559

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaCast.cpp b/clang/lib/Sema/SemaCast.cpp
index 07b058911c2..ad1d7da4d07 100644
--- a/clang/lib/Sema/SemaCast.cpp
+++ b/clang/lib/Sema/SemaCast.cpp
@@ -2105,6 +2105,7 @@ void CastOperation::CheckCXXCStyleCast(bool FunctionalStyle,
         && (SrcExpr.get()->getType()->isIntegerType()
             || SrcExpr.get()->getType()->isFloatingType())) {
       Kind = CK_VectorSplat;
+      SrcExpr = Self.prepareVectorSplat(DestType, SrcExpr.get());
       return;
     }
 
@@ -2339,6 +2340,7 @@ void CastOperation::CheckCStyleCast() {
     if (DestVecTy->getVectorKind() == VectorType::AltiVecVector &&
           (SrcType->isIntegerType() || SrcType->isFloatingType())) {
       Kind = CK_VectorSplat;
+      SrcExpr = Self.prepareVectorSplat(DestType, SrcExpr.get());
     } else if (Self.CheckVectorCast(OpRange, DestType, SrcType, Kind)) {
       SrcExpr = ExprError();
     }