| Andrew Trick | a1e4118 | 2013-07-12 22:08:48 +0000 | [diff] [blame^] | 1 | ;RUN: opt -S %s -indvars | FileCheck %s |
| 2 | |
| 3 | ; CHECK-LABEL: @foo |
| 4 | ; CHECK-NOT: %lftr.wideiv = trunc i32 %indvars.iv.next to i16 |
| 5 | ; CHECK: %exitcond = icmp ne i32 %indvars.iv.next, 512 |
| 6 | define void @foo() #0 { |
| 7 | entry: |
| 8 | br label %for.body |
| 9 | |
| 10 | for.body: ; preds = %entry, %for.body |
| 11 | %i.01 = phi i16 [ 0, %entry ], [ %inc, %for.body ] |
| 12 | %conv2 = sext i16 %i.01 to i32 |
| 13 | call void @bar(i32 %conv2) #1 |
| 14 | %inc = add i16 %i.01, 1 |
| 15 | %cmp = icmp slt i16 %inc, 512 |
| 16 | br i1 %cmp, label %for.body, label %for.end |
| 17 | |
| 18 | for.end: ; preds = %for.body |
| 19 | ret void |
| 20 | } |
| 21 | |
| 22 | ; Check that post-incrementing the backedge taken count does not overflow. |
| 23 | ; CHECK-LABEL: @postinc |
| 24 | ; CHECK: icmp eq i32 %indvars.iv.next, 256 |
| 25 | define i32 @postinc() #0 { |
| 26 | entry: |
| 27 | br label %do.body |
| 28 | |
| 29 | do.body: ; preds = %do.body, %entry |
| 30 | %first.0 = phi i8 [ 0, %entry ], [ %inc, %do.body ] |
| 31 | %conv = zext i8 %first.0 to i32 |
| 32 | call void @bar(i32 %conv) #1 |
| 33 | %inc = add i8 %first.0, 1 |
| 34 | %cmp = icmp eq i8 %first.0, -1 |
| 35 | br i1 %cmp, label %do.end, label %do.body |
| 36 | |
| 37 | do.end: ; preds = %do.body |
| 38 | ret i32 0 |
| 39 | } |
| 40 | |
| 41 | declare void @bar(i32) |
| 42 | |
| 43 | attributes #0 = { nounwind uwtable } |
| 44 | attributes #1 = { nounwind } |