[llvm] r289807 - [TESTS] Initial commit of tests, by Andrew Tischenko
Alexey Bataev via llvm-commits
llvm-commits at lists.llvm.org
Thu Dec 15 03:48:25 PST 2016
Author: abataev
Date: Thu Dec 15 05:48:24 2016
New Revision: 289807
URL: http://llvm.org/viewvc/llvm-project?rev=289807&view=rev
Log:
[TESTS] Initial commit of tests, by Andrew Tischenko
Added:
llvm/trunk/test/CodeGen/X86/recip-fastmath2.ll
llvm/trunk/test/CodeGen/X86/vector-sqrt.ll
Added: llvm/trunk/test/CodeGen/X86/recip-fastmath2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/recip-fastmath2.ll?rev=289807&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/recip-fastmath2.ll (added)
+++ llvm/trunk/test/CodeGen/X86/recip-fastmath2.ll Thu Dec 15 05:48:24 2016
@@ -0,0 +1,273 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=CHECK --check-prefix=SSE
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=CHECK --check-prefix=AVX
+
+
+define float @f32_no_step_2(float %x) #3 {
+; SSE-LABEL: f32_no_step_2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpss %xmm0, %xmm0
+; SSE-NEXT: mulss {{.*}}(%rip), %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: f32_no_step_2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpss %xmm0, %xmm0, %xmm0
+; AVX-NEXT: vmulss {{.*}}(%rip), %xmm0, %xmm0
+; AVX-NEXT: retq
+ %div = fdiv fast float 1234.0, %x
+ ret float %div
+}
+
+define float @f32_one_step_2(float %x) #1 {
+; SSE-LABEL: f32_one_step_2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpss %xmm0, %xmm2
+; SSE-NEXT: mulss %xmm2, %xmm0
+; SSE-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSE-NEXT: subss %xmm0, %xmm1
+; SSE-NEXT: mulss %xmm2, %xmm1
+; SSE-NEXT: addss %xmm2, %xmm1
+; SSE-NEXT: mulss {{.*}}(%rip), %xmm1
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: f32_one_step_2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpss %xmm0, %xmm0, %xmm1
+; AVX-NEXT: vmulss %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
+; AVX-NEXT: vsubss %xmm0, %xmm2, %xmm0
+; AVX-NEXT: vmulss %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vaddss %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vmulss {{.*}}(%rip), %xmm0, %xmm0
+; AVX-NEXT: retq
+ %div = fdiv fast float 3456.0, %x
+ ret float %div
+}
+
+define float @f32_two_step_2(float %x) #2 {
+; SSE-LABEL: f32_two_step_2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpss %xmm0, %xmm2
+; SSE-NEXT: movaps %xmm0, %xmm3
+; SSE-NEXT: mulss %xmm2, %xmm3
+; SSE-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
+; SSE-NEXT: movaps %xmm1, %xmm4
+; SSE-NEXT: subss %xmm3, %xmm4
+; SSE-NEXT: mulss %xmm2, %xmm4
+; SSE-NEXT: addss %xmm2, %xmm4
+; SSE-NEXT: mulss %xmm4, %xmm0
+; SSE-NEXT: subss %xmm0, %xmm1
+; SSE-NEXT: mulss %xmm4, %xmm1
+; SSE-NEXT: addss %xmm4, %xmm1
+; SSE-NEXT: mulss {{.*}}(%rip), %xmm1
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: f32_two_step_2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpss %xmm0, %xmm0, %xmm1
+; AVX-NEXT: vmulss %xmm1, %xmm0, %xmm2
+; AVX-NEXT: vmovss {{.*#+}} xmm3 = mem[0],zero,zero,zero
+; AVX-NEXT: vsubss %xmm2, %xmm3, %xmm2
+; AVX-NEXT: vmulss %xmm2, %xmm1, %xmm2
+; AVX-NEXT: vaddss %xmm2, %xmm1, %xmm1
+; AVX-NEXT: vmulss %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vsubss %xmm0, %xmm3, %xmm0
+; AVX-NEXT: vmulss %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vaddss %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vmulss {{.*}}(%rip), %xmm0, %xmm0
+; AVX-NEXT: retq
+ %div = fdiv fast float 6789.0, %x
+ ret float %div
+}
+
+define <4 x float> @v4f32_one_step2(<4 x float> %x) #1 {
+; SSE-LABEL: v4f32_one_step2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpps %xmm0, %xmm2
+; SSE-NEXT: mulps %xmm2, %xmm0
+; SSE-NEXT: movaps {{.*#+}} xmm1 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; SSE-NEXT: subps %xmm0, %xmm1
+; SSE-NEXT: mulps %xmm2, %xmm1
+; SSE-NEXT: addps %xmm2, %xmm1
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm1
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: v4f32_one_step2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpps %xmm0, %xmm1
+; AVX-NEXT: vmulps %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vmovaps {{.*#+}} xmm2 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; AVX-NEXT: vsubps %xmm0, %xmm2, %xmm0
+; AVX-NEXT: vmulps %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vaddps %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vmulps {{.*}}(%rip), %xmm0, %xmm0
+; AVX-NEXT: retq
+ %div = fdiv fast <4 x float> <float 1.0, float 2.0, float 3.0, float 4.0>, %x
+ ret <4 x float> %div
+}
+
+define <4 x float> @v4f32_two_step2(<4 x float> %x) #2 {
+; SSE-LABEL: v4f32_two_step2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpps %xmm0, %xmm2
+; SSE-NEXT: movaps %xmm0, %xmm3
+; SSE-NEXT: mulps %xmm2, %xmm3
+; SSE-NEXT: movaps {{.*#+}} xmm1 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; SSE-NEXT: movaps %xmm1, %xmm4
+; SSE-NEXT: subps %xmm3, %xmm4
+; SSE-NEXT: mulps %xmm2, %xmm4
+; SSE-NEXT: addps %xmm2, %xmm4
+; SSE-NEXT: mulps %xmm4, %xmm0
+; SSE-NEXT: subps %xmm0, %xmm1
+; SSE-NEXT: mulps %xmm4, %xmm1
+; SSE-NEXT: addps %xmm4, %xmm1
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm1
+; SSE-NEXT: movaps %xmm1, %xmm0
+; SSE-NEXT: retq
+;
+; AVX-LABEL: v4f32_two_step2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpps %xmm0, %xmm1
+; AVX-NEXT: vmulps %xmm1, %xmm0, %xmm2
+; AVX-NEXT: vmovaps {{.*#+}} xmm3 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; AVX-NEXT: vsubps %xmm2, %xmm3, %xmm2
+; AVX-NEXT: vmulps %xmm2, %xmm1, %xmm2
+; AVX-NEXT: vaddps %xmm2, %xmm1, %xmm1
+; AVX-NEXT: vmulps %xmm1, %xmm0, %xmm0
+; AVX-NEXT: vsubps %xmm0, %xmm3, %xmm0
+; AVX-NEXT: vmulps %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vaddps %xmm0, %xmm1, %xmm0
+; AVX-NEXT: vmulps {{.*}}(%rip), %xmm0, %xmm0
+; AVX-NEXT: retq
+ %div = fdiv fast <4 x float> <float 1.0, float 2.0, float 3.0, float 4.0>, %x
+ ret <4 x float> %div
+}
+
+define <8 x float> @v8f32_one_step2(<8 x float> %x) #1 {
+; SSE-LABEL: v8f32_one_step2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpps %xmm1, %xmm4
+; SSE-NEXT: mulps %xmm4, %xmm1
+; SSE-NEXT: movaps {{.*#+}} xmm2 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; SSE-NEXT: movaps %xmm2, %xmm3
+; SSE-NEXT: subps %xmm1, %xmm3
+; SSE-NEXT: mulps %xmm4, %xmm3
+; SSE-NEXT: addps %xmm4, %xmm3
+; SSE-NEXT: rcpps %xmm0, %xmm1
+; SSE-NEXT: mulps %xmm1, %xmm0
+; SSE-NEXT: subps %xmm0, %xmm2
+; SSE-NEXT: mulps %xmm1, %xmm2
+; SSE-NEXT: addps %xmm1, %xmm2
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm2
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm3
+; SSE-NEXT: movaps %xmm2, %xmm0
+; SSE-NEXT: movaps %xmm3, %xmm1
+; SSE-NEXT: retq
+;
+; AVX-LABEL: v8f32_one_step2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpps %ymm0, %ymm1
+; AVX-NEXT: vmulps %ymm1, %ymm0, %ymm0
+; AVX-NEXT: vmovaps {{.*#+}} ymm2 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; AVX-NEXT: vsubps %ymm0, %ymm2, %ymm0
+; AVX-NEXT: vmulps %ymm0, %ymm1, %ymm0
+; AVX-NEXT: vaddps %ymm0, %ymm1, %ymm0
+; AVX-NEXT: vmulps {{.*}}(%rip), %ymm0, %ymm0
+; AVX-NEXT: retq
+ %div = fdiv fast <8 x float> <float 1.0, float 2.0, float 3.0, float 4.0, float 5.0, float 6.0, float 7.0, float 8.0>, %x
+ ret <8 x float> %div
+}
+
+define <8 x float> @v8f32_two_step2(<8 x float> %x) #2 {
+; SSE-LABEL: v8f32_two_step2:
+; SSE: # BB#0:
+; SSE-NEXT: movaps %xmm0, %xmm2
+; SSE-NEXT: rcpps %xmm1, %xmm3
+; SSE-NEXT: movaps %xmm1, %xmm4
+; SSE-NEXT: mulps %xmm3, %xmm4
+; SSE-NEXT: movaps {{.*#+}} xmm0 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; SSE-NEXT: movaps %xmm0, %xmm5
+; SSE-NEXT: subps %xmm4, %xmm5
+; SSE-NEXT: mulps %xmm3, %xmm5
+; SSE-NEXT: addps %xmm3, %xmm5
+; SSE-NEXT: mulps %xmm5, %xmm1
+; SSE-NEXT: movaps %xmm0, %xmm3
+; SSE-NEXT: subps %xmm1, %xmm3
+; SSE-NEXT: mulps %xmm5, %xmm3
+; SSE-NEXT: addps %xmm5, %xmm3
+; SSE-NEXT: rcpps %xmm2, %xmm1
+; SSE-NEXT: movaps %xmm2, %xmm4
+; SSE-NEXT: mulps %xmm1, %xmm4
+; SSE-NEXT: movaps %xmm0, %xmm5
+; SSE-NEXT: subps %xmm4, %xmm5
+; SSE-NEXT: mulps %xmm1, %xmm5
+; SSE-NEXT: addps %xmm1, %xmm5
+; SSE-NEXT: mulps %xmm5, %xmm2
+; SSE-NEXT: subps %xmm2, %xmm0
+; SSE-NEXT: mulps %xmm5, %xmm0
+; SSE-NEXT: addps %xmm5, %xmm0
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm0
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm3
+; SSE-NEXT: movaps %xmm3, %xmm1
+; SSE-NEXT: retq
+;
+; AVX-LABEL: v8f32_two_step2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpps %ymm0, %ymm1
+; AVX-NEXT: vmulps %ymm1, %ymm0, %ymm2
+; AVX-NEXT: vmovaps {{.*#+}} ymm3 = [1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00,1.000000e+00]
+; AVX-NEXT: vsubps %ymm2, %ymm3, %ymm2
+; AVX-NEXT: vmulps %ymm2, %ymm1, %ymm2
+; AVX-NEXT: vaddps %ymm2, %ymm1, %ymm1
+; AVX-NEXT: vmulps %ymm1, %ymm0, %ymm0
+; AVX-NEXT: vsubps %ymm0, %ymm3, %ymm0
+; AVX-NEXT: vmulps %ymm0, %ymm1, %ymm0
+; AVX-NEXT: vaddps %ymm0, %ymm1, %ymm0
+; AVX-NEXT: vmulps {{.*}}(%rip), %ymm0, %ymm0
+; AVX-NEXT: retq
+ %div = fdiv fast <8 x float> <float 1.0, float 2.0, float 3.0, float 4.0, float 5.0, float 6.0, float 7.0, float 8.0>, %x
+ ret <8 x float> %div
+}
+
+define <8 x float> @v8f32_no_step(<8 x float> %x) #3 {
+; SSE-LABEL: v8f32_no_step:
+; SSE: # BB#0:
+; SSE-NEXT: rcpps %xmm0, %xmm0
+; SSE-NEXT: rcpps %xmm1, %xmm1
+; SSE-NEXT: retq
+;
+; AVX-LABEL: v8f32_no_step:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpps %ymm0, %ymm0
+; AVX-NEXT: retq
+ %div = fdiv fast <8 x float> <float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0, float 1.0>, %x
+ ret <8 x float> %div
+}
+
+define <8 x float> @v8f32_no_step2(<8 x float> %x) #3 {
+; SSE-LABEL: v8f32_no_step2:
+; SSE: # BB#0:
+; SSE-NEXT: rcpps %xmm1, %xmm1
+; SSE-NEXT: rcpps %xmm0, %xmm0
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm0
+; SSE-NEXT: mulps {{.*}}(%rip), %xmm1
+; SSE-NEXT: retq
+;
+; AVX-LABEL: v8f32_no_step2:
+; AVX: # BB#0:
+; AVX-NEXT: vrcpps %ymm0, %ymm0
+; AVX-NEXT: vmulps {{.*}}(%rip), %ymm0, %ymm0
+; AVX-NEXT: retq
+ %div = fdiv fast <8 x float> <float 1.0, float 2.0, float 3.0, float 4.0, float 5.0, float 6.0, float 7.0, float 8.0>, %x
+ ret <8 x float> %div
+}
+
+attributes #0 = { "unsafe-fp-math"="true" "reciprocal-estimates"="!divf,!vec-divf" }
+attributes #1 = { "unsafe-fp-math"="true" "reciprocal-estimates"="divf,vec-divf" }
+attributes #2 = { "unsafe-fp-math"="true" "reciprocal-estimates"="divf:2,vec-divf:2" }
+attributes #3 = { "unsafe-fp-math"="true" "reciprocal-estimates"="divf:0,vec-divf:0" }
+
Added: llvm/trunk/test/CodeGen/X86/vector-sqrt.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/vector-sqrt.ll?rev=289807&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/vector-sqrt.ll (added)
+++ llvm/trunk/test/CodeGen/X86/vector-sqrt.ll Thu Dec 15 05:48:24 2016
@@ -0,0 +1,77 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefix=CHECK
+
+; ModuleID = 'vector-sqrt.c'
+source_filename = "vector-sqrt.c"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; Function Attrs: nounwind readonly uwtable
+define <2 x double> @sqrtd2(double* nocapture readonly %v) local_unnamed_addr #0 {
+; CHECK-LABEL: sqrtd2:
+; CHECK: # BB#0: # %entry
+; CHECK-NEXT: vsqrtsd (%rdi), %xmm0, %xmm0
+; CHECK-NEXT: vsqrtsd 8(%rdi), %xmm1, %xmm1
+; CHECK-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
+; CHECK-NEXT: retq
+entry:
+ %0 = load double, double* %v, align 8, !tbaa !1
+ %call = tail call double @sqrt(double %0) #2
+ %arrayidx1 = getelementptr inbounds double, double* %v, i64 1
+ %1 = load double, double* %arrayidx1, align 8, !tbaa !1
+ %call2 = tail call double @sqrt(double %1) #2
+ %vecinit.i = insertelement <2 x double> undef, double %call, i32 0
+ %vecinit1.i = insertelement <2 x double> %vecinit.i, double %call2, i32 1
+ ret <2 x double> %vecinit1.i
+}
+
+; Function Attrs: nounwind readnone
+declare double @sqrt(double) local_unnamed_addr #1
+
+; Function Attrs: nounwind readonly uwtable
+define <4 x float> @sqrtf4(float* nocapture readonly %v) local_unnamed_addr #0 {
+; CHECK-LABEL: sqrtf4:
+; CHECK: # BB#0: # %entry
+; CHECK-NEXT: vsqrtss (%rdi), %xmm0, %xmm0
+; CHECK-NEXT: vsqrtss 4(%rdi), %xmm1, %xmm1
+; CHECK-NEXT: vsqrtss 8(%rdi), %xmm2, %xmm2
+; CHECK-NEXT: vsqrtss 12(%rdi), %xmm3, %xmm3
+; CHECK-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[2,3]
+; CHECK-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0,1],xmm2[0],xmm0[3]
+; CHECK-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0,1,2],xmm3[0]
+; CHECK-NEXT: retq
+entry:
+ %0 = load float, float* %v, align 4, !tbaa !5
+ %call = tail call float @sqrtf(float %0) #2
+ %arrayidx1 = getelementptr inbounds float, float* %v, i64 1
+ %1 = load float, float* %arrayidx1, align 4, !tbaa !5
+ %call2 = tail call float @sqrtf(float %1) #2
+ %arrayidx3 = getelementptr inbounds float, float* %v, i64 2
+ %2 = load float, float* %arrayidx3, align 4, !tbaa !5
+ %call4 = tail call float @sqrtf(float %2) #2
+ %arrayidx5 = getelementptr inbounds float, float* %v, i64 3
+ %3 = load float, float* %arrayidx5, align 4, !tbaa !5
+ %call6 = tail call float @sqrtf(float %3) #2
+ %vecinit.i = insertelement <4 x float> undef, float %call, i32 0
+ %vecinit1.i = insertelement <4 x float> %vecinit.i, float %call2, i32 1
+ %vecinit2.i = insertelement <4 x float> %vecinit1.i, float %call4, i32 2
+ %vecinit3.i = insertelement <4 x float> %vecinit2.i, float %call6, i32 3
+ ret <4 x float> %vecinit3.i
+}
+
+; Function Attrs: nounwind readnone
+declare float @sqrtf(float) local_unnamed_addr #1
+
+attributes #0 = { nounwind readonly uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="haswell" "target-features"="+aes,+avx,+avx2,+bmi,+bmi2,+cx16,+f16c,+fma,+fsgsbase,+fxsr,+lzcnt,+mmx,+movbe,+pclmul,+popcnt,+rdrnd,+rtm,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+x87,+xsave,+xsaveopt" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="haswell" "target-features"="+aes,+avx,+avx2,+bmi,+bmi2,+cx16,+f16c,+fma,+fsgsbase,+fxsr,+lzcnt,+mmx,+movbe,+pclmul,+popcnt,+rdrnd,+rtm,+sse,+sse2,+sse3,+sse4.1,+sse4.2,+ssse3,+x87,+xsave,+xsaveopt" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind readnone }
+
+!llvm.ident = !{!0}
+
+!0 = !{!"clang version 4.0.0 (trunk 289787)"}
+!1 = !{!2, !2, i64 0}
+!2 = !{!"double", !3, i64 0}
+!3 = !{!"omnipotent char", !4, i64 0}
+!4 = !{!"Simple C/C++ TBAA"}
+!5 = !{!6, !6, i64 0}
+!6 = !{!"float", !3, i64 0}
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