59 lines
2.2 KiB
LLVM
59 lines
2.2 KiB
LLVM
; RUN: opt -S -loop-vectorize -instcombine -force-vector-width=4 -force-vector-interleave=1 -enable-interleaved-mem-accesses=true < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; Check that the interleaved-mem-access analysis currently does not create an
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; interleave group for the access to array 'in' due to the possibly wrapping
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; unsigned 'out_ix' index.
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;
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; In this test the interleave-group of the loads is not full (has gaps), so
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; the wrapping checks are necessary. Here this cannot be done statically so
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; runtime checks are needed, but with Assume=false getPtrStride cannot add
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; runtime checks and as a result we can't create the interleave-group.
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;
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; FIXME: This is currently a missed optimization until we can use Assume=true
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; with proper threshold checks. Once we do that the candidate interleave-group
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; will not be invalidated by the wrapping checks.
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; #include <stdlib.h>
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; void test(float * __restrict__ out, float * __restrict__ in, size_t size)
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; {
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; for (size_t out_offset = 0; out_offset < size; ++out_offset)
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; {
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; float t0 = in[2*out_offset];
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; out[out_offset] = t0;
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; }
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; }
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; CHECK: vector.body:
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; CHECK-NOT: %wide.vec = load <8 x i32>, <8 x i32>* {{.*}}, align 4
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; CHECK-NOT: shufflevector <8 x i32> %wide.vec, <8 x i32> undef, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
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define void @_Z4testPfS_m(float* noalias nocapture %out, float* noalias nocapture readonly %in, i64 %size) local_unnamed_addr {
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entry:
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%cmp7 = icmp eq i64 %size, 0
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br i1 %cmp7, label %for.cond.cleanup, label %for.body.preheader
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for.body.preheader:
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br label %for.body
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for.cond.cleanup.loopexit:
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br label %for.cond.cleanup
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for.cond.cleanup:
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ret void
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for.body:
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%out_offset.08 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%mul = shl i64 %out_offset.08, 1
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%arrayidx = getelementptr inbounds float, float* %in, i64 %mul
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%0 = bitcast float* %arrayidx to i32*
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%1 = load i32, i32* %0, align 4
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%arrayidx1 = getelementptr inbounds float, float* %out, i64 %out_offset.08
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%2 = bitcast float* %arrayidx1 to i32*
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store i32 %1, i32* %2, align 4
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%inc = add nuw i64 %out_offset.08, 1
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%exitcond = icmp eq i64 %inc, %size
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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