| ; REQUIRES: asserts |
| ; RUN: opt -loop-vectorize -force-vector-width=2 -debug-only=loop-vectorize -S -o - < %s 2>&1 | FileCheck %s |
| |
| %struct.foo = type { i32, i64 } |
| |
| ; CHECK: LV: Found an estimated cost of 0 for VF 2 For instruction: %0 = bitcast i64* %b to i32* |
| |
| ; The bitcast below will be scalarized due to the predication in the loop. Bitcasts |
| ; between pointer types should be treated as free, despite the scalarization. |
| define void @foo(%struct.foo* noalias nocapture %in, i32* noalias nocapture readnone %out, i64 %n) { |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %entry, %if.end |
| %i.012 = phi i64 [ %inc, %if.end ], [ 0, %entry ] |
| %b = getelementptr inbounds %struct.foo, %struct.foo* %in, i64 %i.012, i32 1 |
| %0 = bitcast i64* %b to i32* |
| %a = getelementptr inbounds %struct.foo, %struct.foo* %in, i64 %i.012, i32 0 |
| %1 = load i32, i32* %a, align 8 |
| %tobool.not = icmp eq i32 %1, 0 |
| br i1 %tobool.not, label %if.end, label %land.lhs.true |
| |
| land.lhs.true: ; preds = %for.body |
| %2 = load i32, i32* %0, align 4 |
| %cmp2 = icmp sgt i32 %2, 0 |
| br i1 %cmp2, label %if.then, label %if.end |
| |
| if.then: ; preds = %land.lhs.true |
| %sub = add nsw i32 %2, -1 |
| store i32 %sub, i32* %0, align 4 |
| br label %if.end |
| |
| if.end: ; preds = %if.then, %land.lhs.true, %for.body |
| %inc = add nuw nsw i64 %i.012, 1 |
| %exitcond.not = icmp eq i64 %inc, %n |
| br i1 %exitcond.not, label %for.end, label %for.body |
| |
| for.end: ; preds = %if.end |
| ret void |
| } |