103 lines
3.6 KiB
LLVM
103 lines
3.6 KiB
LLVM
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; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -force-vector-width=4 -force-vector-interleave=0 -dce -S \
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; RUN: | FileCheck %s --check-prefix=CHECK-VECTOR
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; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -force-vector-width=1 -force-vector-interleave=0 -dce -S \
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; RUN: | FileCheck %s --check-prefix=CHECK-SCALAR
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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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target triple = "x86_64-apple-macosx10.8.0"
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; We don't unroll this loop because it has a small constant trip count.
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;
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; CHECK-VECTOR-LABEL: @foo(
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; CHECK-VECTOR: load <4 x i32>
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; CHECK-VECTOR-NOT: load <4 x i32>
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; CHECK-VECTOR: store <4 x i32>
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; CHECK-VECTOR-NOT: store <4 x i32>
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; CHECK-VECTOR: ret
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;
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; CHECK-SCALAR-LABEL: @foo(
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; CHECK-SCALAR: load i32, i32*
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; CHECK-SCALAR-NOT: load i32, i32*
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; CHECK-SCALAR: store i32
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; CHECK-SCALAR-NOT: store i32
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; CHECK-SCALAR: ret
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define i32 @foo(i32* nocapture %A) nounwind uwtable ssp {
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br label %1
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; <label>:1 ; preds = %1, %0
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%indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ]
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%2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%3 = load i32, i32* %2, align 4
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%4 = add nsw i32 %3, 6
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store i32 %4, i32* %2, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 100
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br i1 %exitcond, label %5, label %1
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; <label>:5 ; preds = %1
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ret i32 undef
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}
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; But this is a good small loop to unroll as we don't know of a bound on its
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; trip count.
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;
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; CHECK-VECTOR-LABEL: @bar(
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; CHECK-VECTOR: store <4 x i32>
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; CHECK-VECTOR: store <4 x i32>
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; CHECK-VECTOR: ret
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;
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; For x86, loop unroll in loop vectorizer is disabled when VF==1.
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;
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; CHECK-SCALAR-LABEL: @bar(
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; CHECK-SCALAR: store i32
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; CHECK-SCALAR-NOT: store i32
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; CHECK-SCALAR: ret
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define i32 @bar(i32* nocapture %A, i32 %n) nounwind uwtable ssp {
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%1 = icmp sgt i32 %n, 0
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br i1 %1, label %.lr.ph, label %._crit_edge
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.lr.ph: ; preds = %0, %.lr.ph
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%indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
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%2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%3 = load i32, i32* %2, align 4
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%4 = add nsw i32 %3, 6
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store i32 %4, i32* %2, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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ret i32 undef
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}
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; Also unroll if we need a runtime check but it was going to be added for
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; vectorization anyways.
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; CHECK-VECTOR-LABEL: @runtime_chk(
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; CHECK-VECTOR: store <4 x float>
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; CHECK-VECTOR: store <4 x float>
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;
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; But not if the unrolling would introduce the runtime check.
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; CHECK-SCALAR-LABEL: @runtime_chk(
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; CHECK-SCALAR: store float
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; CHECK-SCALAR-NOT: store float
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define void @runtime_chk(float* %A, float* %B, float %N) {
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entry:
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br label %for.body
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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 float, float* %B, i64 %indvars.iv
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%0 = load float, float* %arrayidx, align 4
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%mul = fmul float %0, %N
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%arrayidx2 = getelementptr inbounds float, float* %A, i64 %indvars.iv
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store float %mul, float* %arrayidx2, align 4
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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, 256
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret void
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}
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