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[InstCombine] foldAndOfICmps(): Acquire SimplifyQuery with set CxtI 

Extracted from https://reviews.llvm.org/D67849#inline-610377

llvm-svn: 372653
This commit is contained in:
Roman Lebedev 2019-09-23 20:40:40 +00:00
parent 948786c929
commit 595cfda059
1 changed files with 4 additions and 2 deletions
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6
llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
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@ -1111,6 +1111,8 @@ static Value *foldUnsignedUnderflowCheck(ICmpInst *ZeroICmp,
/// Fold (icmp)&(icmp) if possible.
Value *InstCombiner::foldAndOfICmps(ICmpInst *LHS, ICmpInst *RHS,
Instruction &CxtI) {
const SimplifyQuery Q = SQ.getWithInstruction(&CxtI);
// Fold (!iszero(A & K1) & !iszero(A & K2)) -> (A & (K1 | K2)) == (K1 | K2)
// if K1 and K2 are a one-bit mask.
if (Value *V = foldAndOrOfICmpsOfAndWithPow2(LHS, RHS, true, CxtI))
@ -1154,10 +1156,10 @@ Value *InstCombiner::foldAndOfICmps(ICmpInst *LHS, ICmpInst *RHS,
return V;
if (Value *X =
foldUnsignedUnderflowCheck(LHS, RHS, /*IsAnd=*/true, SQ, Builder))
foldUnsignedUnderflowCheck(LHS, RHS, /*IsAnd=*/true, Q, Builder))
return X;
if (Value *X =
foldUnsignedUnderflowCheck(RHS, LHS, /*IsAnd=*/true, SQ, Builder))
foldUnsignedUnderflowCheck(RHS, LHS, /*IsAnd=*/true, Q, Builder))
return X;
// This only handles icmp of constants: (icmp1 A, C1) & (icmp2 B, C2).