| ; RUN: llc -march=hexagon -enable-pipeliner -stats -o /dev/null < %s 2>&1 | FileCheck %s --check-prefix=STATS |
| ; REQUIRES: asserts |
| |
| ; We're unable to pipeline a loop with a subreg as an operand of a Phi. |
| |
| ; STATS-NOT: 1 pipeliner - Number of loops software pipelined |
| |
| ; Function Attrs: nounwind readnone |
| define void @f0(i32 %a0) #0 { |
| b0: |
| %v0 = sext i32 %a0 to i64 |
| br label %b1 |
| |
| b1: ; preds = %b1, %b0 |
| %v1 = phi i32 [ 805306368, %b0 ], [ %v12, %b1 ] |
| %v2 = phi i32 [ 5, %b0 ], [ %v13, %b1 ] |
| %v3 = sext i32 %v1 to i64 |
| %v4 = mul nsw i64 %v3, %v0 |
| %v5 = lshr i64 %v4, 32 |
| %v6 = trunc i64 %v5 to i32 |
| %v7 = sub nsw i32 536870912, %v6 |
| %v8 = sext i32 %v7 to i64 |
| %v9 = mul nsw i64 %v8, %v3 |
| %v10 = lshr i64 %v9, 32 |
| %v11 = shl nuw nsw i64 %v10, 4 |
| %v12 = trunc i64 %v11 to i32 |
| %v13 = add nsw i32 %v2, -1 |
| %v14 = icmp eq i32 %v13, 0 |
| br i1 %v14, label %b2, label %b1 |
| |
| b2: ; preds = %b1 |
| ret void |
| } |
| |
| attributes #0 = { nounwind readnone "target-cpu"="hexagonv55" } |
