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1478b657c8
I'm going to wait for any review comments and perform some additional testing before turning this on by default. llvm-svn: 143750
84 lines
3.0 KiB
LLVM
84 lines
3.0 KiB
LLVM
; RUN: llc < %s -x86-use-vzeroupper -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -mattr=+avx | FileCheck %s
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declare <4 x float> @do_sse(<4 x float>)
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declare <8 x float> @do_avx(<8 x float>)
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declare <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float>, i8) nounwind readnone
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@x = common global <4 x float> zeroinitializer, align 16
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@g = common global <8 x float> zeroinitializer, align 32
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;; Basic checking - don't emit any vzeroupper instruction
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; CHECK: _test00
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define <4 x float> @test00(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp {
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entry:
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; CHECK-NOT: vzeroupper
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%add.i = fadd <4 x float> %a, %b
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%call3 = call <4 x float> @do_sse(<4 x float> %add.i) nounwind
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; CHECK: ret
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ret <4 x float> %call3
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}
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;; Check parameter 256-bit parameter passing
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; CHECK: _test01
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define <8 x float> @test01(<4 x float> %a, <4 x float> %b, <8 x float> %c) nounwind uwtable ssp {
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entry:
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%tmp = load <4 x float>* @x, align 16
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; CHECK: vzeroupper
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; CHECK-NEXT: callq _do_sse
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%call = tail call <4 x float> @do_sse(<4 x float> %tmp) nounwind
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store <4 x float> %call, <4 x float>* @x, align 16
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; CHECK-NOT: vzeroupper
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; CHECK: callq _do_sse
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%call2 = tail call <4 x float> @do_sse(<4 x float> %call) nounwind
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store <4 x float> %call2, <4 x float>* @x, align 16
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; CHECK: ret
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ret <8 x float> %c
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}
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;; Test the pass convergence and also that vzeroupper is only issued when necessary,
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;; for this function it should be only once
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; CHECK: _test02
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define <4 x float> @test02(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp {
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entry:
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%add.i = fadd <4 x float> %a, %b
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br label %for.body
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for.body: ; preds = %for.body, %entry
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; CHECK: LBB
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; CHECK-NOT: vzeroupper
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%i.018 = phi i32 [ 0, %entry ], [ %1, %for.body ]
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%c.017 = phi <4 x float> [ %add.i, %entry ], [ %call14, %for.body ]
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; CHECK: callq _do_sse
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%call5 = tail call <4 x float> @do_sse(<4 x float> %c.017) nounwind
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; CHECK-NEXT: callq _do_sse
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%call7 = tail call <4 x float> @do_sse(<4 x float> %call5) nounwind
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%tmp11 = load <8 x float>* @g, align 32
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%0 = tail call <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float> %tmp11, i8 1) nounwind
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; CHECK: vzeroupper
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; CHECK-NEXT: callq _do_sse
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%call14 = tail call <4 x float> @do_sse(<4 x float> %0) nounwind
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%1 = add nsw i32 %i.018, 1
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%exitcond = icmp eq i32 %1, 4
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret <4 x float> %call14
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}
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;; Check that we also perform vzeroupper when we return from a function.
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; CHECK: _test03
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define <4 x float> @test03(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp {
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entry:
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%shuf = shufflevector <4 x float> %a, <4 x float> %b, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
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; CHECK-NOT: vzeroupper
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; CHECK: call
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%call = call <8 x float> @do_avx(<8 x float> %shuf) nounwind
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%shuf2 = shufflevector <8 x float> %call, <8 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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; CHECK: vzeroupper
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; CHECK: ret
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ret <4 x float> %shuf2
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}
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