From 2f0ca79a7504a91b16156b199b6f07857f3782c6 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 12 Jan 2005 18:51:15 +0000 Subject: [PATCH] Do not fold (zero_ext (sign_ext V)) -> (sign_ext V), they are not the same. This fixes llvm-test/SingleSource/Regression/C/casts.c git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19519 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 3f598fd8b32..2b5604fec2a 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -511,8 +511,8 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, break; case ISD::ZERO_EXTEND: if (Operand.getValueType() == VT) return Operand; // noop extension - if (OpOpcode == ISD::SIGN_EXTEND || OpOpcode == ISD::ZERO_EXTEND) - return getNode(OpOpcode, VT, Operand.Val->getOperand(0)); + if (OpOpcode == ISD::ZERO_EXTEND) + return getNode(ISD::ZERO_EXTEND, VT, Operand.Val->getOperand(0)); break; case ISD::TRUNCATE: if (Operand.getValueType() == VT) return Operand; // noop truncate