From 84ac4d5a2a8fd0e6f95ec46088c0ca7bb63423ac Mon Sep 17 00:00:00 2001 From: "Michael J. Spencer" Date: Sat, 16 Oct 2010 08:25:41 +0000 Subject: X86-Windows: Emit an undefined global __fltused symbol when targeting Windows if any floating point arguments are passed to an external function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116665 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp') diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index ebc6d38..04c424f 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -15,6 +15,7 @@ #include "SDNodeDbgValue.h" #include "SelectionDAGBuilder.h" #include "llvm/ADT/BitVector.h" +#include "llvm/ADT/PostOrderIterator.h" #include "llvm/ADT/SmallSet.h" #include "llvm/Analysis/AliasAnalysis.h" #include "llvm/Analysis/ConstantFolding.h" @@ -5019,6 +5020,25 @@ void SelectionDAGBuilder::visitCall(const CallInst &I) { } } + // See if any floating point values are being passed to this external + // function. This is used to emit an undefined reference to fltused on + // Windows. + if (!F->hasLocalLinkage() && F->hasName()) { + MachineModuleInfo &MMI = DAG.getMachineFunction().getMMI(); + for (unsigned i = 0, e = I.getNumArgOperands(); i != e && + !MMI.callsExternalFunctionWithFloatingPointArguments(); ++i) { + const Type* T = I.getArgOperand(i)->getType(); + for (po_iterator i = po_begin(T), + e = po_end(T); + i != e; ++i) { + if (i->isFloatingPointTy()) { + MMI.setCallsExternalFunctionWithFloatingPointArguments(true); + break; + } + } + } + } + // Check for well-known libc/libm calls. If the function is internal, it // can't be a library call. if (!F->hasLocalLinkage() && F->hasName()) { -- cgit v1.1