mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-12-25 21:16:19 +00:00
21 lines
692 B
LLVM
21 lines
692 B
LLVM
; If the result of an instruction is only used outside of the loop, sink
|
|
; the instruction to the exit blocks instead of executing it on every
|
|
; iteration of the loop.
|
|
;
|
|
; RUN: llvm-as < %s | opt -licm | llvm-dis | %prcontext mul 1 | grep Out:
|
|
|
|
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=3]
|
|
%tmp.6 = mul i32 %N, %N_addr.0.pn ; <i32> [#uses=1]
|
|
%tmp.7 = sub i32 %tmp.6, %N ; <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.7
|
|
}
|
|
|