From 71d5a2540a98c81f5bcaeb48805e0e2881f530ef Mon Sep 17 00:00:00 2001 From: Dimitry Andric Date: Sun, 16 Apr 2017 16:01:22 +0000 Subject: Vendor import of llvm trunk r300422: https://llvm.org/svn/llvm-project/llvm/trunk@300422 --- lib/CodeGen/MachineLoopInfo.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'lib/CodeGen/MachineLoopInfo.cpp') diff --git a/lib/CodeGen/MachineLoopInfo.cpp b/lib/CodeGen/MachineLoopInfo.cpp index fdeaf7b71161..a9aa1d954e70 100644 --- a/lib/CodeGen/MachineLoopInfo.cpp +++ b/lib/CodeGen/MachineLoopInfo.cpp @@ -87,6 +87,22 @@ MachineBasicBlock *MachineLoop::findLoopControlBlock() { return nullptr; } +DebugLoc MachineLoop::getStartLoc() const { + // Try the pre-header first. + if (MachineBasicBlock *PHeadMBB = getLoopPreheader()) + if (const BasicBlock *PHeadBB = PHeadMBB->getBasicBlock()) + if (DebugLoc DL = PHeadBB->getTerminator()->getDebugLoc()) + return DL; + + // If we have no pre-header or there are no instructions with debug + // info in it, try the header. + if (MachineBasicBlock *HeadMBB = getHeader()) + if (const BasicBlock *HeadBB = HeadMBB->getBasicBlock()) + return HeadBB->getTerminator()->getDebugLoc(); + + return DebugLoc(); +} + MachineBasicBlock * MachineLoopInfo::findLoopPreheader(MachineLoop *L, bool SpeculativePreheader) const { -- cgit v1.2.3