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| author | Craig Topper <craig.topper@intel.com> | 2017-06-24 06:24:04 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2017-06-24 06:24:04 +0000 |
| commit | 252bb20161e6b6855ac7a147a3d037c7fd06dfc1 (patch) | |
| tree | 1139b7bb9bde5a2308406fde388ab1bc32f636bb | |
| parent | 5ce61b02c5df42c4beee63544336a6aab535a176 (diff) | |
| download | llvm-252bb20161e6b6855ac7a147a3d037c7fd06dfc1.tar.gz | |
[ValueTracking][InstCombine] Use m_Shr instead m_CombineOr(m_LShr, m_AShr). NFC
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306205 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Analysis/ValueTracking.cpp | 7 | ||||
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineShifts.cpp | 3 |
2 files changed, 3 insertions, 7 deletions
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp index b065f427b06..fd6e3a643bf 100644 --- a/lib/Analysis/ValueTracking.cpp +++ b/lib/Analysis/ValueTracking.cpp @@ -686,8 +686,7 @@ static void computeKnownBitsFromAssume(const Value *V, KnownBits &Known, Known.One |= RHSKnown.Zero; // assume(v >> c = a) } else if (match(Arg, - m_c_ICmp(Pred, m_CombineOr(m_LShr(m_V, m_ConstantInt(C)), - m_AShr(m_V, m_ConstantInt(C))), + m_c_ICmp(Pred, m_Shr(m_V, m_ConstantInt(C)), m_Value(A))) && Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q.CxtI, Q.DT)) { @@ -698,9 +697,7 @@ static void computeKnownBitsFromAssume(const Value *V, KnownBits &Known, Known.Zero |= RHSKnown.Zero << C->getZExtValue(); Known.One |= RHSKnown.One << C->getZExtValue(); // assume(~(v >> c) = a) - } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_CombineOr( - m_LShr(m_V, m_ConstantInt(C)), - m_AShr(m_V, m_ConstantInt(C)))), + } else if (match(Arg, m_c_ICmp(Pred, m_Not(m_Shr(m_V, m_ConstantInt(C))), m_Value(A))) && Pred == ICmpInst::ICMP_EQ && isValidAssumeForContext(I, Q.CxtI, Q.DT)) { diff --git a/lib/Transforms/InstCombine/InstCombineShifts.cpp b/lib/Transforms/InstCombine/InstCombineShifts.cpp index 8cec865c642..1bb1a85367d 100644 --- a/lib/Transforms/InstCombine/InstCombineShifts.cpp +++ b/lib/Transforms/InstCombine/InstCombineShifts.cpp @@ -556,8 +556,7 @@ Instruction *InstCombiner::visitShl(BinaryOperator &I) { // The inexact versions are deferred to DAGCombine, so we don't hide shl // behind a bit mask. const APInt *ShOp1; - if (match(Op0, m_CombineOr(m_Exact(m_LShr(m_Value(X), m_APInt(ShOp1))), - m_Exact(m_AShr(m_Value(X), m_APInt(ShOp1)))))) { + if (match(Op0, m_Exact(m_Shr(m_Value(X), m_APInt(ShOp1))))) { unsigned ShrAmt = ShOp1->getZExtValue(); if (ShrAmt < ShAmt) { // If C1 < C2: (X >>?,exact C1) << C2 --> X << (C2 - C1) |