derek.holloway
7502bf64a4
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44 lines
1.8 KiB
LLVM
44 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s | FileCheck %s
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target triple = "aarch64-unknown-linux-gnu"
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; Currently there is no custom lowering for vector shuffles operating on types
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; bigger than NEON. However, having no support opens us up to a code generator
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; hang when expanding BUILD_VECTOR. Here we just validate the promblematic case
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; successfully exits code generation.
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define void @hang_when_merging_stores_after_legalisation(ptr %a, <2 x i32> %b) vscale_range(2,2) #0 {
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; CHECK-LABEL: hang_when_merging_stores_after_legalisation:
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; CHECK: // %bb.0:
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; CHECK-NEXT: // kill: def $d0 killed $d0 def $z0
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; CHECK-NEXT: mov z0.s, s0
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; CHECK-NEXT: movprfx z1, z0
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; CHECK-NEXT: ext z1.b, z1.b, z0.b, #16
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; CHECK-NEXT: st2 { v0.4s, v1.4s }, [x0]
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; CHECK-NEXT: ret
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%splat = shufflevector <2 x i32> %b, <2 x i32> poison, <8 x i32> zeroinitializer
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%interleaved.vec = shufflevector <8 x i32> %splat, <8 x i32> poison, <8 x i32> <i32 0, i32 4, i32 1, i32 5, i32 2, i32 6, i32 3, i32 7>
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store <8 x i32> %interleaved.vec, ptr %a, align 4
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ret void
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}
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; Ensure we don't crash when trying to lower a shuffle via an extract
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define void @crash_when_lowering_extract_shuffle(ptr %dst, i1 %cond) vscale_range(2,2) #0 {
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; CHECK-LABEL: crash_when_lowering_extract_shuffle:
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; CHECK: // %bb.0:
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; CHECK-NEXT: ret
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%broadcast.splat = shufflevector <32 x i1> zeroinitializer, <32 x i1> zeroinitializer, <32 x i32> zeroinitializer
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br i1 %cond, label %exit, label %vector.body
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vector.body:
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%1 = load <32 x i32>, ptr %dst, align 16
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%predphi = select <32 x i1> %broadcast.splat, <32 x i32> zeroinitializer, <32 x i32> %1
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store <32 x i32> %predphi, ptr %dst, align 16
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br label %exit
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exit:
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ret void
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}
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attributes #0 = { "target-features"="+sve" }
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