From c36b7069b42bece963b7e6adf020353ce990ef76 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Fri, 7 Jan 2011 23:50:32 +0000 Subject: Do not model all INLINEASM instructions as having unmodelled side effects. Instead encode llvm IR level property "HasSideEffects" in an operand (shared with IsAlignStack). Added MachineInstrs::hasUnmodeledSideEffects() to check the operand when the instruction is an INLINEASM. This allows memory instructions to be moved around INLINEASM instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123044 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp') diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 2167523..2869bd8 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -5738,9 +5738,14 @@ void SelectionDAGBuilder::visitInlineAsm(ImmutableCallSite CS) { const MDNode *SrcLoc = CS.getInstruction()->getMetadata("srcloc"); AsmNodeOperands.push_back(DAG.getMDNode(SrcLoc)); - // Remember the AlignStack bit as operand 3. - AsmNodeOperands.push_back(DAG.getTargetConstant(IA->isAlignStack() ? 1 : 0, - MVT::i1)); + // Remember the HasSideEffect and AlignStack bits as operand 3. + unsigned ExtraInfo = 0; + if (IA->hasSideEffects()) + ExtraInfo |= InlineAsm::Extra_HasSideEffects; + if (IA->isAlignStack()) + ExtraInfo |= InlineAsm::Extra_IsAlignStack; + AsmNodeOperands.push_back(DAG.getTargetConstant(ExtraInfo, + TLI.getPointerTy())); // Loop over all of the inputs, copying the operand values into the // appropriate registers and processing the output regs. -- cgit v1.1