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21 lines
692 B
LLVM
21 lines
692 B
LLVM
; If the result of an instruction is only used outside of the loop, sink
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; the instruction to the exit blocks instead of executing it on every
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; iteration of the loop.
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;
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; RUN: llvm-as < %s | opt -licm | llvm-dis | %prcontext mul 1 | grep Out:
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define i32 @test(i32 %N) {
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Entry:
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br label %Loop
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Loop: ; preds = %Loop, %Entry
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%N_addr.0.pn = phi i32 [ %dec, %Loop ], [ %N, %Entry ] ; <i32> [#uses=3]
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%tmp.6 = mul i32 %N, %N_addr.0.pn ; <i32> [#uses=1]
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%tmp.7 = sub i32 %tmp.6, %N ; <i32> [#uses=1]
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%dec = add i32 %N_addr.0.pn, -1 ; <i32> [#uses=1]
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%tmp.1 = icmp ne i32 %N_addr.0.pn, 1 ; <i1> [#uses=1]
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br i1 %tmp.1, label %Loop, label %Out
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Out: ; preds = %Loop
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ret i32 %tmp.7
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}
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