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22 lines
461 B
LLVM
22 lines
461 B
LLVM
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep phi | count 1
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define void @foo(i32 %n) {
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entry:
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br label %loop
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loop:
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%i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
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; These three instructions form an isolated cycle and can be deleted.
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%j = phi i32 [ 0, %entry ], [ %j.y, %loop ]
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%j.x = add i32 %j, 1
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%j.y = mul i32 %j.x, 2
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%i.next = add i32 %i, 1
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%c = icmp ne i32 %i.next, %n
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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