26 lines
765 B
LLVM
26 lines
765 B
LLVM
; Here we have a case where there are two loops and LICM is hoisting an
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; instruction from one loop into the other loop! This is obviously bad and
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; happens because preheader insertion doesn't insert a preheader for this
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; case... bad.
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; RUN: llvm-as < %s | opt -licm -adce -simplifycfg | llvm-dis | not grep 'br '
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int %main(int %argc) {
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br label %bb5
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bb5: ; preds = %bb5, %0
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%I = phi int [0, %0], [%I2, %bb5]
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%I2 = add int %I, 1
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%c = seteq int %I2, 10
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br bool %c, label %bb5, label %bb8
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bb8: ; preds = %bb8, %bb5
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%cann-indvar = phi uint [ 0, %bb8 ], [ 0, %bb5 ]
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%X = add int %argc, %argc ; Loop invariant
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br bool false, label %bb8, label %bb10
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bb10: ; preds = %bb8
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ret int %X
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}
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