| ; PR34438 |
| ; Loop has a short trip count of 8 iterations. It should be vectorized because no runtime checks or tail loop are necessary. |
| ; Two cases tested AVX (MaxVF=8 = TripCount) and AVX512 (MaxVF=16 > TripCount) |
| |
| ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -S | FileCheck %s |
| ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=skylake-avx512 -S | FileCheck %s |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.8.0" |
| |
| define void @small_tc(float* noalias nocapture %A, float* noalias nocapture readonly %B) { |
| ; CHECK-LABEL: @small_tc |
| ; CHECK: load <8 x float>, <8 x float>* |
| ; CHECK: fadd fast <8 x float> |
| entry: |
| br label %for.body |
| |
| for.body: |
| %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| %arrayidx = getelementptr inbounds float, float* %B, i64 %indvars.iv |
| %0 = load float, float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !3 |
| %arrayidx2 = getelementptr inbounds float, float* %A, i64 %indvars.iv |
| %1 = load float, float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !3 |
| %add = fadd fast float %0, %1 |
| store float %add, float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !3 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %exitcond = icmp eq i64 %indvars.iv.next, 8 |
| br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !4 |
| |
| for.end: |
| ret void |
| } |
| |
| !3 = !{!3} |
| !4 = !{!4} |