| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt %s -passes=loop-vectorize,instcombine,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -mtriple=x86_64-unknown-linux-gnu -mattr=avx512vl,avx512dq,avx512bw -S | FileCheck %s |
| |
| @bytes = global [128 x i8] zeroinitializer, align 16 |
| |
| ; Make sure we end up with vector code for this loop. We used to try to create |
| ; a VF=64,UF=4 loop, but the scalar trip count is only 128 so |
| ; the vector loop was dead code leaving only a scalar remainder. |
| define zeroext i8 @sum() { |
| ; CHECK-LABEL: @sum( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[WIDE_LOAD2:%.*]] = load <64 x i8>, ptr getelementptr inbounds nuw (i8, ptr @bytes, i64 64), align 1 |
| ; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <64 x i8>, ptr @bytes, align 1 |
| ; CHECK-NEXT: [[BIN_RDX:%.*]] = add <64 x i8> [[WIDE_LOAD2]], [[WIDE_LOAD]] |
| ; CHECK-NEXT: [[TMP0:%.*]] = call i8 @llvm.vector.reduce.add.v64i8(<64 x i8> [[BIN_RDX]]) |
| ; CHECK-NEXT: ret i8 [[TMP0]] |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| %r.010 = phi i8 [ 0, %entry ], [ %add, %for.body ] |
| %arrayidx = getelementptr inbounds [128 x i8], ptr @bytes, i64 0, i64 %indvars.iv |
| %0 = load i8, ptr %arrayidx, align 1 |
| %add = add i8 %0, %r.010 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, 128 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body |
| %add.lcssa = phi i8 [ %add, %for.body ] |
| ret i8 %add.lcssa |
| } |
