llvm-6502/test/Transforms/LICM/sink_load.ll
John Criswell cc455dea0f Use the new prcontext script.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15427 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-02 22:31:58 +00:00

21 lines
568 B
LLVM

; 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 int 5
int %test(int %N) {
Entry:
br label %Loop
Loop:
%N_addr.0.pn = phi int [ %dec, %Loop ], [ %N, %Entry ]
%tmp.6 = load int* %X
%dec = add int %N_addr.0.pn, -1
%tmp.1 = setne int %N_addr.0.pn, 1
br bool %tmp.1, label %Loop, label %Out
Out:
ret int %tmp.6
}