| Andrew Trick | 37eb38d | 2011-07-21 00:40:04 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -loop-reduce -S | FileCheck %s |
| 2 | ; |
| 3 | ; Test LSR's OptimizeShadowIV. Handle a floating-point IV with a |
| 4 | ; nonzero initial value. |
| 5 | ; rdar://9786536 |
| 6 | |
| 7 | ; First, make sure LSR doesn't crash on an empty IVUsers list. |
| 8 | ; CHECK: @dummyIV |
| 9 | ; CHECK-NOT: phi |
| 10 | ; CHECK-NOT: sitofp |
| 11 | ; CHECK: br |
| 12 | define void @dummyIV() nounwind { |
| 13 | entry: |
| 14 | br label %loop |
| 15 | |
| 16 | loop: |
| 17 | %i.01 = phi i32 [ -39, %entry ], [ %inc, %loop ] |
| 18 | %conv7 = sitofp i32 %i.01 to double |
| 19 | %inc = add nsw i32 %i.01, 1 |
| 20 | br i1 undef, label %loop, label %for.end |
| 21 | |
| 22 | for.end: |
| 23 | unreachable |
| 24 | } |