shift-factor.ll 378 B

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  1. ; There should be exactly one shift and one add left.
  2. ; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s
  3. define i32 @test1(i32 %X, i32 %Y) {
  4. ; CHECK-LABEL: test1
  5. ; CHECK-NEXT: %tmp = add i32 %Y, %X
  6. ; CHECK-NEXT: %tmp1 = shl i32 %tmp, 1
  7. ; CHECK-NEXT: ret i32 %tmp1
  8. %tmp.2 = shl i32 %X, 1
  9. %tmp.6 = shl i32 %Y, 1
  10. %tmp.4 = add i32 %tmp.6, %tmp.2
  11. ret i32 %tmp.4
  12. }