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26 lines
888 B
LLVM
26 lines
888 B
LLVM
; The induction variable canonicalization pass shouldn't leave dead
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; instructions laying around!
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;
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; RUN: llvm-as < %s | opt -indvars | llvm-dis | \
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; RUN: not grep {#uses=0}
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define i32 @mul(i32 %x, i32 %y) {
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entry:
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br label %tailrecurse
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tailrecurse: ; preds = %endif, %entry
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%accumulator.tr = phi i32 [ %x, %entry ], [ %tmp.9, %endif ] ; <i32> [#uses=2]
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%y.tr = phi i32 [ %y, %entry ], [ %tmp.8, %endif ] ; <i32> [#uses=2]
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%tmp.1 = icmp eq i32 %y.tr, 0 ; <i1> [#uses=1]
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br i1 %tmp.1, label %return, label %endif
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endif: ; preds = %tailrecurse
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%tmp.8 = add i32 %y.tr, -1 ; <i32> [#uses=1]
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%tmp.9 = add i32 %accumulator.tr, %x ; <i32> [#uses=1]
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br label %tailrecurse
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return: ; preds = %tailrecurse
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ret i32 %accumulator.tr
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}
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