| Andrew Trick | 4b02915 | 2011-07-02 02:34:25 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -indvars -S | FileCheck %s |
| 2 | ; RUN: opt < %s -indvars -disable-iv-rewrite -S | FileCheck %s |
| Dan Gohman | d2067fd | 2009-02-18 00:52:00 +0000 | [diff] [blame] | 3 | |
| 4 | ; Indvars should insert a 64-bit induction variable to eliminate the |
| 5 | ; sext for the addressing, however it shouldn't eliminate the sext |
| 6 | ; on the other phi, since that value undergoes signed wrapping. |
| 7 | |
| 8 | define void @foo(i32* nocapture %d, i32 %n) nounwind { |
| 9 | entry: |
| 10 | %0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1] |
| 11 | br i1 %0, label %bb.nph, label %return |
| 12 | |
| 13 | bb.nph: ; preds = %entry |
| 14 | br label %bb |
| 15 | |
| Andrew Trick | 4b02915 | 2011-07-02 02:34:25 +0000 | [diff] [blame] | 16 | ; CHECK: bb: |
| 17 | ; CHECK: phi i64 |
| 18 | ; CHECK: sext i8 |
| 19 | ; CHECK-NOT: sext |
| Dan Gohman | d2067fd | 2009-02-18 00:52:00 +0000 | [diff] [blame] | 20 | bb: ; preds = %bb1, %bb.nph |
| 21 | %i.02 = phi i32 [ %5, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=2] |
| 22 | %p.01 = phi i8 [ %4, %bb1 ], [ -1, %bb.nph ] ; <i8> [#uses=2] |
| 23 | %1 = sext i8 %p.01 to i32 ; <i32> [#uses=1] |
| 24 | %2 = sext i32 %i.02 to i64 ; <i64> [#uses=1] |
| 25 | %3 = getelementptr i32* %d, i64 %2 ; <i32*> [#uses=1] |
| 26 | store i32 %1, i32* %3, align 4 |
| 27 | %4 = add i8 %p.01, 1 ; <i8> [#uses=1] |
| 28 | %5 = add i32 %i.02, 1 ; <i32> [#uses=2] |
| 29 | br label %bb1 |
| 30 | |
| 31 | bb1: ; preds = %bb |
| 32 | %6 = icmp slt i32 %5, %n ; <i1> [#uses=1] |
| 33 | br i1 %6, label %bb, label %bb1.return_crit_edge |
| 34 | |
| 35 | bb1.return_crit_edge: ; preds = %bb1 |
| 36 | br label %return |
| 37 | |
| 38 | return: ; preds = %bb1.return_crit_edge, %entry |
| 39 | ret void |
| 40 | } |