no-preheader-test.ll 622 B

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  1. ; Test that LICM works when there is not a loop-preheader
  2. ; RUN: opt < %s -licm | llvm-dis
  3. define void @testfunc(i32 %i.s, i1 %ifcond) {
  4. br i1 %ifcond, label %Then, label %Else
  5. Then: ; preds = %0
  6. br label %Loop
  7. Else: ; preds = %0
  8. br label %Loop
  9. Loop: ; preds = %Loop, %Else, %Then
  10. %j = phi i32 [ 0, %Then ], [ 12, %Else ], [ %Next, %Loop ] ; <i32> [#uses=1]
  11. %i = bitcast i32 %i.s to i32 ; <i32> [#uses=1]
  12. %i2 = mul i32 %i, 17 ; <i32> [#uses=1]
  13. %Next = add i32 %j, %i2 ; <i32> [#uses=2]
  14. %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
  15. br i1 %cond, label %Out, label %Loop
  16. Out: ; preds = %Loop
  17. ret void
  18. }