1 ; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s 2 3 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" 4 target triple = "x86_64-apple-macosx10.9.0" 5 6 ; Make sure we vectorize this loop: 7 ; int foo(float *a, float *b, int n) { 8 ; for (int i=0; i<n; ++i) 9 ; a[i] = b[i] * 3; 10 ; } 11 12 ;CHECK-LABEL: define i32 @foo 13 ;CHECK: for.body.preheader: 14 ;CHECK: br i1 %cmp.zero, label %scalar.ph, label %vector.memcheck, !dbg [[BODY_LOC:![0-9]+]] 15 ;CHECK: vector.memcheck: 16 ;CHECK: br i1 %memcheck.conflict, label %scalar.ph, label %vector.ph, !dbg [[BODY_LOC]] 17 ;CHECK: load <4 x float> 18 define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp { 19 entry: 20 %cmp6 = icmp sgt i32 %n, 0, !dbg !6 21 br i1 %cmp6, label %for.body, label %for.end, !dbg !6 22 23 for.body: ; preds = %entry, %for.body 24 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ], !dbg !7 25 %arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv, !dbg !7 26 %0 = load float, float* %arrayidx, align 4, !dbg !7 27 %mul = fmul float %0, 3.000000e+00, !dbg !7 28 %arrayidx2 = getelementptr inbounds float, float* %a, i64 %indvars.iv, !dbg !7 29 store float %mul, float* %arrayidx2, align 4, !dbg !7 30 %indvars.iv.next = add i64 %indvars.iv, 1, !dbg !7 31 %lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !7 32 %exitcond = icmp eq i32 %lftr.wideiv, %n, !dbg !7 33 br i1 %exitcond, label %for.end, label %for.body, !dbg !7 34 35 for.end: ; preds = %for.body, %entry 36 ret i32 undef, !dbg !8 37 } 38 39 ; Make sure that we try to vectorize loops with a runtime check if the 40 ; dependency check fails. 41 42 ; CHECK-LABEL: test_runtime_check 43 ; CHECK: <4 x float> 44 define void @test_runtime_check(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) { 45 entry: 46 br label %for.body 47 48 for.body: 49 %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ] 50 %ind.sum = add i64 %iv, %offset 51 %arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum 52 %l1 = load float, float* %arr.idx, align 4 53 %ind.sum2 = add i64 %iv, %offset2 54 %arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2 55 %l2 = load float, float* %arr.idx2, align 4 56 %m = fmul fast float %b, %l2 57 %ad = fadd fast float %l1, %m 58 store float %ad, float* %arr.idx, align 4 59 %iv.next = add nuw nsw i64 %iv, 1 60 %exitcond = icmp eq i64 %iv.next, %n 61 br i1 %exitcond, label %loopexit, label %for.body 62 63 loopexit: 64 ret void 65 } 66 67 ; CHECK: [[BODY_LOC]] = !DILocation(line: 101, column: 1, scope: !{{.*}}) 68 69 !llvm.module.flags = !{!0, !1} 70 !0 = !{i32 2, !"Dwarf Version", i32 4} 71 !1 = !{i32 2, !"Debug Info Version", i32 3} 72 73 !2 = !{} 74 !3 = !DISubroutineType(types: !2) 75 !4 = !DIFile(filename: "test.cpp", directory: "/tmp") 76 !5 = distinct !DISubprogram(name: "foo", scope: !4, file: !4, line: 99, type: !3, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, variables: !2) 77 !6 = !DILocation(line: 100, column: 1, scope: !5) 78 !7 = !DILocation(line: 101, column: 1, scope: !5) 79 !8 = !DILocation(line: 102, column: 1, scope: !5) 80
