Mercurial > hg > Members > tobaru > cbc > CbC_llvm
view test/CodeGen/X86/avx-vzeroupper.ll @ 33:e4204d083e25
LLVM 3.5
author | Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp> |
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date | Thu, 12 Dec 2013 14:32:10 +0900 |
parents | 95c75e76d11b |
children | 54457678186b |
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; RUN: llc < %s -x86-use-vzeroupper -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -mattr=+avx | FileCheck %s declare <4 x float> @do_sse(<4 x float>) declare <8 x float> @do_avx(<8 x float>) declare <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float>, i8) nounwind readnone @x = common global <4 x float> zeroinitializer, align 16 @g = common global <8 x float> zeroinitializer, align 32 ;; Basic checking - don't emit any vzeroupper instruction ; CHECK: _test00 define <4 x float> @test00(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp { entry: ; CHECK-NOT: vzeroupper %add.i = fadd <4 x float> %a, %b %call3 = call <4 x float> @do_sse(<4 x float> %add.i) nounwind ; CHECK: ret ret <4 x float> %call3 } ;; Check parameter 256-bit parameter passing ; CHECK: _test01 define <8 x float> @test01(<4 x float> %a, <4 x float> %b, <8 x float> %c) nounwind uwtable ssp { entry: %tmp = load <4 x float>* @x, align 16 ; CHECK: vzeroupper ; CHECK-NEXT: callq _do_sse %call = tail call <4 x float> @do_sse(<4 x float> %tmp) nounwind store <4 x float> %call, <4 x float>* @x, align 16 ; CHECK-NOT: vzeroupper ; CHECK: callq _do_sse %call2 = tail call <4 x float> @do_sse(<4 x float> %call) nounwind store <4 x float> %call2, <4 x float>* @x, align 16 ; CHECK: ret ret <8 x float> %c } ;; Test the pass convergence and also that vzeroupper is only issued when necessary, ;; for this function it should be only once ; CHECK: _test02 define <4 x float> @test02(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp { entry: %add.i = fadd <4 x float> %a, %b br label %for.body for.body: ; preds = %for.body, %entry ; CHECK: LBB ; CHECK-NOT: vzeroupper %i.018 = phi i32 [ 0, %entry ], [ %1, %for.body ] %c.017 = phi <4 x float> [ %add.i, %entry ], [ %call14, %for.body ] ; CHECK: callq _do_sse %call5 = tail call <4 x float> @do_sse(<4 x float> %c.017) nounwind ; CHECK-NEXT: callq _do_sse %call7 = tail call <4 x float> @do_sse(<4 x float> %call5) nounwind %tmp11 = load <8 x float>* @g, align 32 %0 = tail call <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float> %tmp11, i8 1) nounwind ; CHECK: vzeroupper ; CHECK-NEXT: callq _do_sse %call14 = tail call <4 x float> @do_sse(<4 x float> %0) nounwind %1 = add nsw i32 %i.018, 1 %exitcond = icmp eq i32 %1, 4 br i1 %exitcond, label %for.end, label %for.body for.end: ; preds = %for.body ret <4 x float> %call14 } ;; Check that we also perform vzeroupper when we return from a function. ; CHECK: _test03 define <4 x float> @test03(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp { entry: %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> ; CHECK-NOT: vzeroupper ; CHECK: call %call = call <8 x float> @do_avx(<8 x float> %shuf) nounwind %shuf2 = shufflevector <8 x float> %call, <8 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3> ; CHECK: vzeroupper ; CHECK: ret ret <4 x float> %shuf2 }