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Add extra CHECK to make sure that 'or' instruction was replaced.
Also add an assert to avoid confusion in the code where is known that C1 <= C2. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171310 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1528,6 +1528,8 @@ Value *InstCombiner::FoldOrOfICmps(ICmpInst *LHS, ICmpInst *RHS) {
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if (LHS->getOperand(0) == RHS->getOperand(0)) {
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// if LHSCst and RHSCst differ only by one bit:
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// (A == C1 || A == C2) -> (A & ~(C1 ^ C2)) == C1
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assert(LHSCst->getValue().ule(LHSCst->getValue()));
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APInt Xor = LHSCst->getValue() ^ RHSCst->getValue();
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if (Xor.isPowerOf2()) {
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Value *NegCst = Builder->getInt(~Xor);
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@ -699,6 +699,7 @@ define i1 @test68(i32 %x) nounwind uwtable {
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; CHECK: @test69
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; CHECK: %1 = and i32 %c, -33
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; CHECK: %2 = icmp eq i32 %1, 65
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; CHECK: ret i1 %2
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define i1 @test69(i32 %c) nounwind uwtable {
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%1 = icmp eq i32 %c, 97
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%2 = icmp eq i32 %c, 65
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