From 27615d7f2159ef219167cfc3e804d17105a62e78 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 4 Aug 2003 23:42:37 +0000 Subject: [PATCH] Don't bother calculating info unless its needed. May reduce number of stack slots created. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7584 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocLocal.cpp | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp index 57f3c836e55..f6eacda9c45 100644 --- a/lib/CodeGen/RegAllocLocal.cpp +++ b/lib/CodeGen/RegAllocLocal.cpp @@ -238,10 +238,6 @@ void RA::spillVirtReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator &I, DEBUG(std::cerr << " which corresponds to no vreg, " << "must be spurious physreg: ignoring (WARNING)\n"); } else { - // FIXME: move this into the conditional?? - const TargetRegisterClass *RC = MF->getSSARegMap()->getRegClass(VirtReg); - int FrameIndex = getStackSpaceFor(VirtReg, RC); - DEBUG(std::cerr << " containing %reg" << VirtReg; if (!isVirtRegModified(VirtReg)) std::cerr << " which has not been modified, so no store necessary!"); @@ -250,6 +246,8 @@ void RA::spillVirtReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator &I, // register. We only need to spill it into its stack slot if it has been // modified. if (isVirtRegModified(VirtReg)) { + const TargetRegisterClass *RC = MF->getSSARegMap()->getRegClass(VirtReg); + int FrameIndex = getStackSpaceFor(VirtReg, RC); DEBUG(std::cerr << " to stack slot #" << FrameIndex); RegInfo->storeRegToStackSlot(MBB, I, PhysReg, FrameIndex, RC); ++NumSpilled; // Update statistics -- 2.34.1