| ; RUN: opt < %s -O2 -force-vector-interleave=2 -force-vector-width=4 -debug-only=loop-vectorize -stats -S 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| |
| ; Loop from "rotated" |
| ; CHECK: LV: Loop hints: force=enabled |
| ; Loop from "nonrotated" |
| ; CHECK: LV: Loop hints: force=enabled |
| ; No more loops in the module |
| ; CHECK-NOT: LV: Loop hints: force= |
| ; In total only 1 loop should be rotated. |
| ; CHECK: 1 loop-rotate |
| |
| 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" |
| |
| ; See http://reviews.llvm.org/D3348 for details. |
| |
| ; |
| ; Test #1 |
| ; |
| ; Ensure that "llvm.loop.vectorize.enable" metadata was not lost prior to LoopVectorize pass. |
| ; In past LoopRotate was clearing that metadata. |
| ; |
| ; The source C code is: |
| ; void rotated(float *a, int size) |
| ; { |
| ; int t = 0; |
| ; #pragma omp simd |
| ; for (int i = 0; i < size; ++i) { |
| ; a[i] = a[i-5] * a[i+2]; |
| ; ++t; |
| ; } |
| ;} |
| |
| define void @rotated(float* nocapture %a, i64 %size) { |
| entry: |
| %cmp1 = icmp sgt i64 %size, 0 |
| br i1 %cmp1, label %for.header, label %for.end |
| |
| for.header: |
| %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] |
| %cmp2 = icmp sgt i64 %indvars.iv, %size |
| br i1 %cmp2, label %for.end, label %for.body |
| |
| for.body: |
| |
| %0 = add nsw i64 %indvars.iv, -5 |
| %arrayidx = getelementptr inbounds float, float* %a, i64 %0 |
| %1 = load float, float* %arrayidx, align 4, !llvm.mem.parallel_loop_access !1 |
| %2 = add nsw i64 %indvars.iv, 2 |
| %arrayidx2 = getelementptr inbounds float, float* %a, i64 %2 |
| %3 = load float, float* %arrayidx2, align 4, !llvm.mem.parallel_loop_access !1 |
| %mul = fmul float %1, %3 |
| %arrayidx4 = getelementptr inbounds float, float* %a, i64 %indvars.iv |
| store float %mul, float* %arrayidx4, align 4, !llvm.mem.parallel_loop_access !1 |
| |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| br label %for.header, !llvm.loop !1 |
| |
| for.end: |
| ret void |
| } |
| |
| !1 = !{!1, !2} |
| !2 = !{!"llvm.loop.vectorize.enable", i1 true} |
| |
| ; |
| ; Test #2 |
| ; |
| ; Ensure that "llvm.loop.vectorize.enable" metadata was not lost even |
| ; if loop was not rotated (see http://reviews.llvm.org/D3348#comment-4). |
| ; |
| define i32 @nonrotated(i32 %a) { |
| entry: |
| br label %loop_cond |
| loop_cond: |
| %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ] |
| %cmp = icmp ne i32 %indx, %a |
| br i1 %cmp, label %return, label %loop_inc |
| loop_inc: |
| %inc = add i32 %indx, 1 |
| br label %loop_cond, !llvm.loop !3 |
| return: |
| ret i32 0 |
| } |
| |
| !3 = !{!3, !4} |
| !4 = !{!"llvm.loop.vectorize.enable", i1 true} |