forked from OSchip/llvm-project
210 lines
10 KiB
LLVM
210 lines
10 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s
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; RUN: opt < %s -loop-vectorize -disable-basic-aa -S -pass-remarks-analysis='loop-vectorize' 2>&1 | FileCheck %s -check-prefix=FORCED_OPTSIZE
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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"
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; Make sure we vectorize this loop:
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; int foo(float *a, float *b, int n) {
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; for (int i=0; i<n; ++i)
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; a[i] = b[i] * 3;
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; }
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define i32 @foo(float* nocapture %a, float* nocapture %b, i32 %n) nounwind uwtable ssp {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP6:%.*]] = icmp sgt i32 [[N:%.*]], 0, [[DBG4:!dbg !.*]]
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; CHECK-NEXT: br i1 [[CMP6]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]], [[DBG4]]
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; CHECK: for.body.preheader:
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; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1, [[DBG9:!dbg !.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64, [[DBG9]]
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; CHECK-NEXT: [[TMP2:%.*]] = add nuw nsw i64 [[TMP1]], 1, [[DBG9]]
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; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP0]], 3, [[DBG9]]
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; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]], [[DBG9]]
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; CHECK: vector.memcheck:
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; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[N]], -1, [[DBG9]]
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; CHECK-NEXT: [[TMP4:%.*]] = zext i32 [[TMP3]] to i64, [[DBG9]]
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; CHECK-NEXT: [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1, [[DBG9]]
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; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr float, float* [[A:%.*]], i64 [[TMP5]], [[DBG9]]
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; CHECK-NEXT: [[SCEVGEP4:%.*]] = getelementptr float, float* [[B:%.*]], i64 [[TMP5]], [[DBG9]]
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; CHECK-NEXT: [[BOUND0:%.*]] = icmp ugt float* [[SCEVGEP4]], [[A]], [[DBG9]]
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; CHECK-NEXT: [[BOUND1:%.*]] = icmp ugt float* [[SCEVGEP]], [[B]], [[DBG9]]
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; CHECK-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]], [[DBG9]]
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; CHECK-NEXT: br i1 [[FOUND_CONFLICT]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]], [[DBG9]]
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; CHECK: vector.ph:
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; CHECK-NEXT: [[N_VEC:%.*]] = and i64 [[TMP2]], 8589934588, [[DBG9]]
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]], [[DBG9]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ], [[DBG9]]
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; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds float, float* [[B]], i64 [[INDEX]], [[DBG9]]
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; CHECK-NEXT: [[TMP7:%.*]] = bitcast float* [[TMP6]] to <4 x float>*, [[DBG9]]
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; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <4 x float>, <4 x float>* [[TMP7]], align 4, [[DBG9]], !alias.scope !10
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; CHECK-NEXT: [[TMP8:%.*]] = fmul <4 x float> [[WIDE_LOAD]], <float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00>, [[DBG9]]
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; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds float, float* [[A]], i64 [[INDEX]], [[DBG9]]
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; CHECK-NEXT: [[TMP10:%.*]] = bitcast float* [[TMP9]] to <4 x float>*, [[DBG9]]
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; CHECK-NEXT: store <4 x float> [[TMP8]], <4 x float>* [[TMP10]], align 4, [[DBG9]], !alias.scope !13, !noalias !10
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; CHECK-NEXT: [[INDEX_NEXT]] = add i64 [[INDEX]], 4, [[DBG9]]
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; CHECK-NEXT: [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]], [[DBG9]]
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; CHECK-NEXT: br i1 [[TMP11]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], [[DBG9]], [[LOOP15:!llvm.loop !.*]]
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; CHECK: middle.block:
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; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP2]], [[N_VEC]], [[DBG9]]
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; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[SCALAR_PH]], [[DBG9]]
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; CHECK: scalar.ph:
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; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[FOR_BODY_PREHEADER]] ], [ 0, [[VECTOR_MEMCHECK]] ], [[DBG9]]
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; CHECK-NEXT: br label [[FOR_BODY:%.*]], [[DBG9]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [[DBG9]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, float* [[B]], i64 [[INDVARS_IV]], [[DBG9]]
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; CHECK-NEXT: [[TMP12:%.*]] = load float, float* [[ARRAYIDX]], align 4, [[DBG9]]
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; CHECK-NEXT: [[MUL:%.*]] = fmul float [[TMP12]], 3.000000e+00, [[DBG9]]
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; CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds float, float* [[A]], i64 [[INDVARS_IV]], [[DBG9]]
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; CHECK-NEXT: store float [[MUL]], float* [[ARRAYIDX2]], align 4, [[DBG9]]
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1, [[DBG9]]
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; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32, [[DBG9]]
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]], [[DBG9]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY]], [[DBG9]], [[LOOP17:!llvm.loop !.*]]
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; CHECK: for.end.loopexit:
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; CHECK-NEXT: br label [[FOR_END]], [[DBG18:!dbg !.*]]
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; CHECK: for.end:
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; CHECK-NEXT: ret i32 undef, [[DBG18]]
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;
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entry:
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%cmp6 = icmp sgt i32 %n, 0, !dbg !6
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br i1 %cmp6, label %for.body, label %for.end, !dbg !6
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ], !dbg !7
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%arrayidx = getelementptr inbounds float, float* %b, i64 %indvars.iv, !dbg !7
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%0 = load float, float* %arrayidx, align 4, !dbg !7
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%mul = fmul float %0, 3.000000e+00, !dbg !7
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%arrayidx2 = getelementptr inbounds float, float* %a, i64 %indvars.iv, !dbg !7
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store float %mul, float* %arrayidx2, align 4, !dbg !7
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%indvars.iv.next = add i64 %indvars.iv, 1, !dbg !7
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32, !dbg !7
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%exitcond = icmp eq i32 %lftr.wideiv, %n, !dbg !7
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br i1 %exitcond, label %for.end, label %for.body, !dbg !7
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for.end: ; preds = %for.body, %entry
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ret i32 undef, !dbg !8
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}
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; Make sure that we try to vectorize loops with a runtime check if the
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; dependency check fails.
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; CHECK-LABEL: test_runtime_check
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; CHECK: <4 x float>
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define void @test_runtime_check(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n) {
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entry:
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br label %for.body
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for.body:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
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%ind.sum = add i64 %iv, %offset
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%arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum
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%l1 = load float, float* %arr.idx, align 4
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%ind.sum2 = add i64 %iv, %offset2
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%arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2
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%l2 = load float, float* %arr.idx2, align 4
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%m = fmul fast float %b, %l2
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%ad = fadd fast float %l1, %m
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store float %ad, float* %arr.idx, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond = icmp eq i64 %iv.next, %n
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br i1 %exitcond, label %loopexit, label %for.body
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loopexit:
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ret void
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}
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; Check we do not generate runtime checks if we found a known dependence preventing
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; vectorization. In this case, it is a read of c[i-1] followed by a write of c[i].
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; The runtime checks would always fail.
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; void test_runtime_check2(float *a, float b, unsigned offset, unsigned offset2, unsigned n, float *c) {
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; for (unsigned i = 1; i < n; i++) {
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; a[i+o1] += a[i+o2] + b;
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; c[i] = c[i-1] + b;
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; }
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; }
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;
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; CHECK-LABEL: test_runtime_check2
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; CHECK-NOT: <4 x float>
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define void @test_runtime_check2(float* %a, float %b, i64 %offset, i64 %offset2, i64 %n, float* %c) {
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entry:
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br label %for.body
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for.body:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
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%ind.sum = add i64 %iv, %offset
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%arr.idx = getelementptr inbounds float, float* %a, i64 %ind.sum
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%l1 = load float, float* %arr.idx, align 4
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%ind.sum2 = add i64 %iv, %offset2
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%arr.idx2 = getelementptr inbounds float, float* %a, i64 %ind.sum2
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%l2 = load float, float* %arr.idx2, align 4
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%m = fmul fast float %b, %l2
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%ad = fadd fast float %l1, %m
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store float %ad, float* %arr.idx, align 4
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%c.ind = add i64 %iv, -1
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%c.idx = getelementptr inbounds float, float* %c, i64 %c.ind
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%lc = load float, float* %c.idx, align 4
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%vc = fadd float %lc, 1.0
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%c.idx2 = getelementptr inbounds float, float* %c, i64 %iv
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store float %vc, float* %c.idx2
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond = icmp eq i64 %iv.next, %n
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br i1 %exitcond, label %loopexit, label %for.body
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loopexit:
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ret void
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}
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; CHECK: !9 = !DILocation(line: 101, column: 1, scope: !{{.*}})
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define dso_local void @forced_optsize(i64* noalias nocapture readonly %x_p, i64* noalias nocapture readonly %y_p, i64* noalias nocapture %z_p) minsize optsize {
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;
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; FORCED_OPTSIZE: remark: <unknown>:0:0: loop not vectorized: runtime pointer checks needed. Enable vectorization of this loop with '#pragma clang loop vectorize(enable)' when compiling with -Os/-Oz
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; FORCED_OPTSIZE-LABEL: @forced_optsize(
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; FORCED_OPTSIZE-NOT: vector.body:
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;
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entry:
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br label %for.body
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for.cond.cleanup:
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ret void
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i64, i64* %x_p, i64 %indvars.iv
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%0 = load i64, i64* %arrayidx, align 8
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%arrayidx2 = getelementptr inbounds i64, i64* %y_p, i64 %indvars.iv
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%1 = load i64, i64* %arrayidx2, align 8
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%add = add nsw i64 %1, %0
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%arrayidx4 = getelementptr inbounds i64, i64* %z_p, i64 %indvars.iv
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store i64 %add, i64* %arrayidx4, align 8
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 128
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br i1 %exitcond, label %for.cond.cleanup, label %for.body, !llvm.loop !12
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}
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!llvm.module.flags = !{!0, !1}
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!llvm.dbg.cu = !{!9}
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!0 = !{i32 2, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = !{}
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!3 = !DISubroutineType(types: !2)
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!4 = !DIFile(filename: "test.cpp", directory: "/tmp")
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!5 = distinct !DISubprogram(name: "foo", scope: !4, file: !4, line: 99, type: !3, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, unit: !9, retainedNodes: !2)
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!6 = !DILocation(line: 100, column: 1, scope: !5)
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!7 = !DILocation(line: 101, column: 1, scope: !5)
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!8 = !DILocation(line: 102, column: 1, scope: !5)
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!9 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
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file: !10,
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isOptimized: true, flags: "-O2",
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splitDebugFilename: "abc.debug", emissionKind: 2)
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!10 = !DIFile(filename: "path/to/file", directory: "/path/to/dir")
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!11 = !{i32 2, !"Debug Info Version", i32 3}
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!12 = distinct !{!12, !13, !14}
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!13 = !{!"llvm.loop.vectorize.width", i32 2}
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!14 = !{!"llvm.loop.vectorize.enable", i1 true}
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