| ; To reduce register pressure, if a load is hoistable out of the loop, and the |
| ; result of the load is only used outside of the loop, sink the load instead of |
| ; hoisting it! |
| ; |
| ; RUN: llvm-as < %s | opt -licm | llvm-dis | %prcontext load 1 | grep Out: |
| |
| @X = global i32 5 ; <i32*> [#uses=1] |
| |
| define i32 @test(i32 %N) { |
| Entry: |
| br label %Loop |
| Loop: ; preds = %Loop, %Entry |
| %N_addr.0.pn = phi i32 [ %dec, %Loop ], [ %N, %Entry ] ; <i32> [#uses=2] |
| %tmp.6 = load i32* @X ; <i32> [#uses=1] |
| %dec = add i32 %N_addr.0.pn, -1 ; <i32> [#uses=1] |
| %tmp.1 = icmp ne i32 %N_addr.0.pn, 1 ; <i1> [#uses=1] |
| br i1 %tmp.1, label %Loop, label %Out |
| Out: ; preds = %Loop |
| ret i32 %tmp.6 |
| } |
| |