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| author | dim <dim@FreeBSD.org> | 2011-02-27 01:32:10 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2011-02-27 01:32:10 +0000 |
| commit | b951d621be1d00a520871c689c1cd687b6aa3ae6 (patch) | |
| tree | 5c342f2374324ffec4626f558d9aa49f323f90b4 /contrib/llvm/lib/CodeGen/InlineSpiller.cpp | |
| parent | 4004d6a3076e94bd23e681411c43682267a202fe (diff) | |
| parent | a0fb00f9837bd0d2e5948f16f6a6b82a7a628f51 (diff) | |
| download | FreeBSD-src-b951d621be1d00a520871c689c1cd687b6aa3ae6.zip FreeBSD-src-b951d621be1d00a520871c689c1cd687b6aa3ae6.tar.gz | |
Update llvm/clang to trunk r126547.
There are several bugfixes in this update, but the most important one is
to ensure __start_ and __stop_ symbols for linker sets and kernel module
metadata are always emitted in object files:
http://llvm.org/bugs/show_bug.cgi?id=9292
Before this fix, if you compiled kernel modules with clang, they would
not be properly processed by kldxref, and if they had any dependencies,
the kernel would fail to load those. Another problem occurred when
attempting to mount a tmpfs filesystem, which would result in 'operation
not supported by device'.
Diffstat (limited to 'contrib/llvm/lib/CodeGen/InlineSpiller.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/InlineSpiller.cpp | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/contrib/llvm/lib/CodeGen/InlineSpiller.cpp b/contrib/llvm/lib/CodeGen/InlineSpiller.cpp index a1bd972..38e6c85 100644 --- a/contrib/llvm/lib/CodeGen/InlineSpiller.cpp +++ b/contrib/llvm/lib/CodeGen/InlineSpiller.cpp @@ -102,8 +102,7 @@ Spiller *createInlineSpiller(MachineFunctionPass &pass, } } -/// reMaterializeFor - Attempt to rematerialize edit_->getReg() before MI instead of -/// reloading it. +/// reMaterializeFor - Attempt to rematerialize before MI instead of reloading. bool InlineSpiller::reMaterializeFor(MachineBasicBlock::iterator MI) { SlotIndex UseIdx = lis_.getInstructionIndex(MI).getUseIndex(); VNInfo *OrigVNI = edit_->getParent().getVNInfoAt(UseIdx); @@ -346,7 +345,8 @@ void InlineSpiller::spill(LiveRangeEdit &edit) { && "Trying to spill a stack slot."); DEBUG(dbgs() << "Inline spilling " << mri_.getRegClass(edit.getReg())->getName() - << ':' << edit.getParent() << "\n"); + << ':' << edit.getParent() << "\nFrom original " + << PrintReg(vrm_.getOriginal(edit.getReg())) << '\n'); assert(edit.getParent().isSpillable() && "Attempting to spill already spilled value."); @@ -357,12 +357,20 @@ void InlineSpiller::spill(LiveRangeEdit &edit) { return; rc_ = mri_.getRegClass(edit.getReg()); - stackSlot_ = vrm_.assignVirt2StackSlot(edit_->getReg()); + + // Share a stack slot among all descendants of Orig. + unsigned Orig = vrm_.getOriginal(edit.getReg()); + stackSlot_ = vrm_.getStackSlot(Orig); + if (stackSlot_ == VirtRegMap::NO_STACK_SLOT) + stackSlot_ = vrm_.assignVirt2StackSlot(Orig); + + if (Orig != edit.getReg()) + vrm_.assignVirt2StackSlot(edit.getReg(), stackSlot_); // Update LiveStacks now that we are committed to spilling. LiveInterval &stacklvr = lss_.getOrCreateInterval(stackSlot_, rc_); - assert(stacklvr.empty() && "Just created stack slot not empty"); - stacklvr.getNextValue(SlotIndex(), 0, lss_.getVNInfoAllocator()); + if (!stacklvr.hasAtLeastOneValue()) + stacklvr.getNextValue(SlotIndex(), 0, lss_.getVNInfoAllocator()); stacklvr.MergeRangesInAsValue(edit_->getParent(), stacklvr.getValNumInfo(0)); // Iterate over instructions using register. |
