; This testcase comes from this C fragment: ; ; void test(unsigned Num, int *Array) { ; unsigned i, j, k; ; ; for (i = 0; i != Num; ++i) ; for (j = 0; j != Num; ++j) ; for (k = 0; k != Num; ++k) ; printf("%d\n", i+k+j); /* Reassociate to (i+j)+k */ ;} ; ; In this case, we want to reassociate the specified expr so that i+j can be ; hoisted out of the inner most loop. ; ; RUN: llvm-as < %s | opt -reassociate | llvm-dis | grep 115 | not grep 117 %.LC0 = internal global [4 x sbyte] c"%d\0A\00" ; <[4 x sbyte]*> [#uses=1] declare int "printf"(sbyte*, ...) void "test"(uint %Num, int* %Array) { bb0: ;[#uses=1] %cond221 = seteq uint 0, %Num ; [#uses=3] br bool %cond221, label %bb7, label %bb2 bb2: ;[#uses=3] %reg115 = phi uint [ %reg120, %bb6 ], [ 0, %bb0 ] ; [#uses=2] br bool %cond221, label %bb6, label %bb3 bb3: ;[#uses=3] %reg116 = phi uint [ %reg119, %bb5 ], [ 0, %bb2 ] ; [#uses=2] br bool %cond221, label %bb5, label %bb4 bb4: ;[#uses=3] %reg117 = phi uint [ %reg118, %bb4 ], [ 0, %bb3 ] ; [#uses=2] %reg113 = add uint %reg115, %reg117 ; [#uses=1] %reg114 = add uint %reg113, %reg116 ; [#uses=1] %cast227 = getelementptr [4 x sbyte]* %.LC0, long 0, long 0 ; [#uses=1] call int (sbyte*, ...)* %printf( sbyte* %cast227, uint %reg114 ) ; :0 [#uses=0] %reg118 = add uint %reg117, 1 ; [#uses=2] %cond224 = setne uint %reg118, %Num ; [#uses=1] br bool %cond224, label %bb4, label %bb5 bb5: ;[#uses=3] %reg119 = add uint %reg116, 1 ; [#uses=2] %cond225 = setne uint %reg119, %Num ; [#uses=1] br bool %cond225, label %bb3, label %bb6 bb6: ;[#uses=3] %reg120 = add uint %reg115, 1 ; [#uses=2] %cond226 = setne uint %reg120, %Num ; [#uses=1] br bool %cond226, label %bb2, label %bb7 bb7: ;[#uses=2] ret void }