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21 lines
583 B
LLVM
21 lines
583 B
LLVM
; To reduce register pressure, if a load is hoistable out of the loop, and the
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; result of the load is only used outside of the loop, sink the load instead of
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; hoisting it!
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;
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; RUN: llvm-upgrade < %s | llvm-as | opt -licm | llvm-dis | %prcontext load 1 | grep Out:
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%X = global int 5
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int %test(int %N) {
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Entry:
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br label %Loop
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Loop:
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%N_addr.0.pn = phi int [ %dec, %Loop ], [ %N, %Entry ]
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%tmp.6 = load int* %X
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%dec = add int %N_addr.0.pn, -1
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%tmp.1 = setne int %N_addr.0.pn, 1
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br bool %tmp.1, label %Loop, label %Out
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Out:
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ret int %tmp.6
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}
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