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author | Nick Lewycky <nicholas@mxc.ca> | 2014-02-20 05:06:26 +0000 |
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committer | Nick Lewycky <nicholas@mxc.ca> | 2014-02-20 05:06:26 +0000 |
commit | 78554867a279f3d293ce86c18c626d8b16248e34 (patch) | |
tree | 9f95a3aad057872e945d584858ee35ef6a947443 /lib/CodeGen/ScheduleDAGInstrs.cpp | |
parent | 31dd38ed2f67d5fcab6a7b27c26bd352c6cc93fd (diff) | |
download | llvm-78554867a279f3d293ce86c18c626d8b16248e34.tar.gz llvm-78554867a279f3d293ce86c18c626d8b16248e34.tar.bz2 llvm-78554867a279f3d293ce86c18c626d8b16248e34.tar.xz |
Simplify the implementation of getUnderlyingObjectsForInstr, without intending to change the semantics at all.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201754 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/ScheduleDAGInstrs.cpp')
-rw-r--r-- | lib/CodeGen/ScheduleDAGInstrs.cpp | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp index f0de7982b1..376b6f2208 100644 --- a/lib/CodeGen/ScheduleDAGInstrs.cpp +++ b/lib/CodeGen/ScheduleDAGInstrs.cpp @@ -148,31 +148,30 @@ static void getUnderlyingObjectsForInstr(const MachineInstr *MI, if (!V) return; + if (const PseudoSourceValue *PSV = dyn_cast<PseudoSourceValue>(V)) { + // For now, ignore PseudoSourceValues which may alias LLVM IR values + // because the code that uses this function has no way to cope with + // such aliases. + if (!PSV->isAliased(MFI)) + Objects.push_back(UnderlyingObjectsVector::value_type(V, false)); + return; + } + SmallVector<Value *, 4> Objs; getUnderlyingObjects(V, Objs); for (SmallVectorImpl<Value *>::iterator I = Objs.begin(), IE = Objs.end(); I != IE; ++I) { - bool MayAlias = true; V = *I; - if (const PseudoSourceValue *PSV = dyn_cast<PseudoSourceValue>(V)) { - // For now, ignore PseudoSourceValues which may alias LLVM IR values - // because the code that uses this function has no way to cope with - // such aliases. - - if (PSV->isAliased(MFI)) { - Objects.clear(); - return; - } + assert(!isa<PseudoSourceValue>(V) && "Underlying value is a stack slot!"); - MayAlias = PSV->mayAlias(MFI); - } else if (!isIdentifiedObject(V)) { + if (!isIdentifiedObject(V)) { Objects.clear(); return; } - Objects.push_back(UnderlyingObjectsVector::value_type(V, MayAlias)); + Objects.push_back(UnderlyingObjectsVector::value_type(V, true)); } } |