| Dan Gohman | a730da3 | 2009-02-18 00:52:00 +0000 | [diff] [blame] | 1 | ; RUN: llvm-as < %s | opt -indvars | llvm-dis > %t |
| Dan Gohman | a5d3801 | 2009-02-18 17:22:41 +0000 | [diff] [blame^] | 2 | ; RUN: grep sext %t | count 2 |
| 3 | ; RUN: grep { = sext i32 %n to i64} %t |
| Dan Gohman | a730da3 | 2009-02-18 00:52:00 +0000 | [diff] [blame] | 4 | ; RUN: grep phi %t | count 1 |
| 5 | ; RUN: grep {phi i64} %t |
| 6 | |
| 7 | ; Indvars should insert a 64-bit induction variable to eliminate the |
| 8 | ; sext for the addressing, however it shouldn't eliminate the sext |
| 9 | ; on the other phi, since that value undergoes signed wrapping. |
| 10 | |
| 11 | define void @foo(i32* nocapture %d, i32 %n) nounwind { |
| 12 | entry: |
| 13 | %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] |
| 14 | br i1 %0, label %bb.nph, label %return |
| 15 | |
| 16 | bb.nph: ; preds = %entry |
| 17 | br label %bb |
| 18 | |
| 19 | bb: ; preds = %bb1, %bb.nph |
| 20 | %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2] |
| 21 | %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2] |
| 22 | %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1] |
| 23 | %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1] |
| 24 | %3 = getelementptr i32* %d, i64 %2 ; <i32*> [#uses=1] |
| 25 | store i32 %1, i32* %3, align 4 |
| 26 | %4 = add i8 %p.01, 1 ; <i8> [#uses=1] |
| 27 | %5 = add i32 %i.02, 1 ; <i32> [#uses=2] |
| 28 | br label %bb1 |
| 29 | |
| 30 | bb1: ; preds = %bb |
| 31 | %6 = icmp slt i32 %5, %n ; <i1> [#uses=1] |
| 32 | br i1 %6, label %bb, label %bb1.return_crit_edge |
| 33 | |
| 34 | bb1.return_crit_edge: ; preds = %bb1 |
| 35 | br label %return |
| 36 | |
| 37 | return: ; preds = %bb1.return_crit_edge, %entry |
| 38 | ret void |
| 39 | } |