diff options
| author | Chris Lattner <sabre@nondot.org> | 2008-03-11 06:21:08 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-03-11 06:21:08 +0000 |
| commit | 5d03f21744f30988b962f023bd397bb5c6a20178 (patch) | |
| tree | aa78148289a2a56acf84060bae2a435bcd5fc414 /lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 3c78697a3cb6e98d904535606fbebab7746d1161 (diff) | |
compile: double test() {}
into:
_test:
fldz
ret
instead of:
_test:
subl $12, %esp
#IMPLICIT_DEF %xmm0
movsd %xmm0, (%esp)
fldl (%esp)
addl $12, %esp
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48213 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index f81d80ebe7..59fd79650a 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -1825,8 +1825,10 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT, assert(MVT::isFloatingPoint(VT) && MVT::isFloatingPoint(Operand.getValueType()) && "Invalid FP cast!"); if (Operand.getValueType() == VT) return Operand; // noop conversion. + if (Operand.getOpcode() == ISD::UNDEF) + return getNode(ISD::UNDEF, VT); break; - case ISD::SIGN_EXTEND: + case ISD::SIGN_EXTEND: assert(MVT::isInteger(VT) && MVT::isInteger(Operand.getValueType()) && "Invalid SIGN_EXTEND!"); if (Operand.getValueType() == VT) return Operand; // noop extension |