diff options
Diffstat (limited to 'clang')
| -rw-r--r-- | clang/lib/CodeGen/CGExprScalar.cpp | 13 | ||||
| -rw-r--r-- | clang/test/CodeGenOpenCL/vector_shufflevector_valid.cl | 13 |
2 files changed, 25 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp index f3e48362130..195c7a4678f 100644 --- a/clang/lib/CodeGen/CGExprScalar.cpp +++ b/clang/lib/CodeGen/CGExprScalar.cpp @@ -1162,6 +1162,16 @@ static llvm::Constant *getMaskElt(llvm::ShuffleVectorInst *SVI, unsigned Idx, return llvm::ConstantInt::get(I32Ty, Off+MV); } +static llvm::Constant *getAsInt32(llvm::ConstantInt *C, llvm::Type *I32Ty) { + if (C->getBitWidth() != 32) { + assert(llvm::ConstantInt::isValueValidForType(I32Ty, + C->getZExtValue()) && + "Index operand too large for shufflevector mask!"); + return llvm::ConstantInt::get(I32Ty, C->getZExtValue()); + } + return C; +} + Value *ScalarExprEmitter::VisitInitListExpr(InitListExpr *E) { bool Ignore = TestAndClearIgnoreResultAssign(); (void)Ignore; @@ -1212,7 +1222,8 @@ Value *ScalarExprEmitter::VisitInitListExpr(InitListExpr *E) { Value *LHS = nullptr, *RHS = nullptr; if (CurIdx == 0) { // insert into undef -> shuffle (src, undef) - Args.push_back(C); + // shufflemask must use an i32 + Args.push_back(getAsInt32(C, CGF.Int32Ty)); Args.resize(ResElts, llvm::UndefValue::get(CGF.Int32Ty)); LHS = EI->getVectorOperand(); diff --git a/clang/test/CodeGenOpenCL/vector_shufflevector_valid.cl b/clang/test/CodeGenOpenCL/vector_shufflevector_valid.cl new file mode 100644 index 00000000000..0953c66f58e --- /dev/null +++ b/clang/test/CodeGenOpenCL/vector_shufflevector_valid.cl @@ -0,0 +1,13 @@ +// RUN: %clang_cc1 -emit-llvm -O0 %s -o - | FileCheck %s + +// The shuffle vector mask must always be of i32 vector type +// See http://reviews.llvm.org/D10838 and https://llvm.org/bugs/show_bug.cgi?id=23800#c2 +// for more information about a bug where a 64 bit index operand causes the generation +// of an invalid mask + +typedef unsigned int uint2 __attribute((ext_vector_type(2))); + +void vector_shufflevector_valid(void) { + //CHECK: {{%.*}} = shufflevector <2 x i32> {{%.*}}, <2 x i32> undef, <2 x i32> <i32 0, i32 undef> + (uint2)(((uint2)(0)).s0, 0); +} |
