83773b77a5
Summary: Avoid that loop vectorizer creates loads/stores of vectors with "irregular" types when interleaving. An example of an irregular type is x86_fp80 that is 80 bits, but that may have an allocation size that is 96 bits. So an array of x86_fp80 is not bitcast compatible with a vector of the same type. Not sure if interleavedAccessCanBeWidened is the best place for this check, but it solves the problem seen in the added test case. And it is the same kind of check that already exists in memoryInstructionCanBeWidened. Reviewers: fhahn, Ayal, craig.topper Reviewed By: fhahn Subscribers: hiraditya, rkruppe, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D63386 llvm-svn: 363547
30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; RUN: opt < %s -enable-interleaved-mem-accesses=true -force-vector-width=4 -loop-vectorize -S | FileCheck %s
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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-macosx10.7.0"
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; Verify that we do not get any loads of vectors with x86_fp80 elements.
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;
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; CHECK-NOT: load {{.*}} x x86_fp80
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define x86_fp80 @foo(x86_fp80* %a) {
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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 x86_fp80 %3
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for.body:
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%i.09 = phi i16 [ 0, %entry ], [ %add3, %for.body ]
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%res.08 = phi x86_fp80 [ undef, %entry ], [ %3, %for.body ]
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%arrayidx = getelementptr inbounds x86_fp80, x86_fp80* %a, i16 %i.09
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%0 = load x86_fp80, x86_fp80* %arrayidx, align 1
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%add = or i16 %i.09, 1
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%arrayidx2 = getelementptr inbounds x86_fp80, x86_fp80* %a, i16 %add
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%1 = load x86_fp80, x86_fp80* %arrayidx2, align 1
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%2 = fadd fast x86_fp80 %0, %res.08
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%3 = fadd fast x86_fp80 %2, %1
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%add3 = add nuw nsw i16 %i.09, 2
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%cmp = icmp ult i16 %add3, 400
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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