[X86] Fix PR30926 - Add patterns for optimizing (v)cvtsi2ss, (v)cvtsi2sd, (v)cvtsd2ss and (v)cvtss2sd clang intrinsic sequences

[eladcohen]

Summary

The code emitted by Clang's intrinsics for (v)cvtsi2ss, (v)cvtsi2sd, (v)cvtsd2ss and (v)cvtss2sd is lowered to a code sequence that includes redundant (v)movss/(v)movsd instructions. This patch adds patterns for optimizing these sequences.

[RKSimon]

Doesn't (v)cvtsd2ss suffer from the same issue as well?

[eladcohen]

In D28455#639276, @RKSimon wrote:

Doesn't (v)cvtsd2ss suffer from the same issue as well?

The Clang intrinsic for (v)cvtsd2ss is implemented using a builtin (_builtin_ia32_cvtsd2ss) and not lowered to generic IR so we don't see this happening. However looking at the semantics IIUC it seems that:

static __inline__ __m128 __DEFAULT_FN_ATTRS
_mm_cvtsd_ss(__m128 __a, __m128d __b) {
  return (__m128)__builtin_ia32_cvtsd2ss((__v4sf)__a, (__v2df)__b);
}

could be also implemented with:

static __inline__ __m128 __DEFAULT_FN_ATTRS
_mm_cvtsd_ss(__m128 __a, __m128d __b)
{
  __a[0] =__b[0];
 return a;
}

Bottom line, I think you are right because the above code doesn't have to come from an intrinsic. I'll add the pattern (I should probably also open a bugzilla for lowering _mm_cvtsd_ss() to generic IR, Right?)
Thanks for the catch!

[eladcohen]

Added patterns for (v)cvtsd2ss

[RKSimon]

lib/Target/X86/X86InstrSSE.td

1962

Should this be [UseAVX] and then add AVX512 patterns in X86InstrAVX512.td ?

1994

It's more typical to put the AVX patterns before the SSE.

[eladcohen]

lib/Target/X86/X86InstrSSE.td

1962

For AVX512 I see two types of intrinsics that correspond to these instructions:

1. With Rounding mode or masks (e.g. _mm_cvt_roundi64_sd) - These will generate a builtin and not generic IR, so they don't require any new patterns.
2. Without rounding mode and masks (e.g. _mm_cvti32_sd) - These are mapped by macros to their matching AVX instruction which are handled in the above patterns - And that's why I want [HasAVX] to catch them.

1994

I'll change this. Thanks

[eladcohen]

Changed patterns order.

[RKSimon]

lib/Target/X86/X86InstrSSE.td

1962

@craig.topper @igorb Is using the AVX path for AVX512 alright with you guys?

[craig.topper]

For AVX-512 we can do the following equivalents

The Int_VCVTSD2SSrr can use VCVTSD2SSZrr. This for some reason doesn't use _Int but does have VR128X register type.
The Int_VCVTSS2SDrr can use VCVTSS2SDZrr. Again it uses VR128X type.
The Int_VCVTSI2SS64rr patterns can use VCVTSI642SSZrr_Int
The Int_VCVTSI2SSrr patterns can use VCVTSI2SSZrr_Int
The Int_VCVTSI2SD64rr patterns can use VCVTSI642SDZrr_Int
The Int_VCVTSI2SDrr patterns can use VCVTSI2SDZrr_Int.

[eladcohen]

Thanks for the pointers!
Added AVX512 patterns

[craig.topper]

lib/Target/X86/X86InstrAVX512.td

5936

unnecessary is spelled wrong

lib/Target/X86/X86InstrSSE.td

1961

Can you add a blank like between the AVX block ending and the SSE block starting

1984

Blank line here too

[eladcohen]

Fixed Craig's comments.

[craig.topper]

LGTM

[eladcohen]

Thanks for the review! committed r291660

lib/Target/X86/X86InstrAVX512.td

let Predicates = [HasAVX512] in {
   def : Pat<(int_x86_sse2_cvtsi642sd VR128X:$src1, (loadi64 addr:$src2)),
             (VCVTSI642SDZrm_Int VR128X:$src1, addr:$src2)>;
   def : Pat<(int_x86_avx512_cvtusi2sd VR128X:$src1, GR32:$src2),
             (VCVTUSI2SDZrr_Int VR128X:$src1, GR32:$src2)>;
   def : Pat<(int_x86_avx512_cvtusi2sd VR128X:$src1, (loadi32 addr:$src2)),
             (VCVTUSI2SDZrm_Int VR128X:$src1, addr:$src2)>;
 } // Predicates = [HasAVX512]
 
+// Patterns used for matching vcvtsi2s{s,d} intrinsic sequences from clang
+// which produce unnecsessary vmovs{s,d} instructions
+let Predicates = [HasAVX512] in {
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128X:$dst),
+                   (v4f32 (scalar_to_vector (f32 (sint_to_fp GR64:$src)))))),
+          (VCVTSI642SSZrr_Int VR128X:$dst, GR64:$src)>;
+
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128X:$dst),
+                   (v4f32 (scalar_to_vector (f32 (sint_to_fp GR32:$src)))))),
+          (VCVTSI2SSZrr_Int VR128X:$dst, GR32:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128X:$dst),
+                   (v2f64 (scalar_to_vector (f64 (sint_to_fp GR64:$src)))))),
+          (VCVTSI642SDZrr_Int VR128X:$dst, GR64:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128X:$dst),
+                   (v2f64 (scalar_to_vector (f64 (sint_to_fp GR32:$src)))))),
+          (VCVTSI2SDZrr_Int VR128X:$dst, GR32:$src)>;
+} // Predicates = [HasAVX512]
+
 // Convert float/double to signed/unsigned int 32/64 with truncation
 multiclass avx512_cvt_s_all<bits<8> opc, string asm, X86VectorVTInfo _SrcRC,
                             X86VectorVTInfo _DstRC, SDNode OpNode,
                             SDNode OpNodeRnd, string aliasStr>{
 let Predicates = [HasAVX512] in {
   def rr : AVX512<opc, MRMSrcReg, (outs _DstRC.RC:$dst), (ins _SrcRC.FRC:$src),
               !strconcat(asm,"\t{$src, $dst|$dst, $src}"),
               [(set _DstRC.RC:$dst, (OpNode _SrcRC.FRC:$src))]>, EVEX;
def : Pat<(f64 (extloadf32 addr:$src)),
           (COPY_TO_REGCLASS (VCVTSS2SDZrr (v4f32 (IMPLICIT_DEF)),
                     (COPY_TO_REGCLASS (VMOVSSZrm addr:$src), VR128X)), VR128X)>,
           Requires<[HasAVX512, OptForSpeed]>;
 
 def : Pat<(f32 (fpround FR64X:$src)),
           (COPY_TO_REGCLASS (VCVTSD2SSZrr (COPY_TO_REGCLASS FR64X:$src, VR128X),
                     (COPY_TO_REGCLASS FR64X:$src, VR128X)), VR128X)>,
            Requires<[HasAVX512]>;
+
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128X:$dst),
+                   (v4f32 (scalar_to_vector
+                     (f32 (fpround (f64 (extractelt VR128X:$src, (iPTR 0))))))))),
+          (VCVTSD2SSZrr VR128X:$dst, VR128X:$src)>,
+          Requires<[HasAVX512]>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128X:$dst),
+                   (v2f64 (scalar_to_vector
+                     (f64 (fpextend (f32 (extractelt VR128X:$src, (iPTR 0))))))))),
+          (VCVTSS2SDZrr VR128X:$dst, VR128X:$src)>,
+          Requires<[HasAVX512]>;
+
 //===----------------------------------------------------------------------===//
 // AVX-512  Vector convert from signed/unsigned integer to float/double
 //          and from float/double to signed/unsigned integer
 //===----------------------------------------------------------------------===//
 
 multiclass avx512_vcvt_fp<bits<8> opc, string OpcodeStr, X86VectorVTInfo _,
                          X86VectorVTInfo _Src, SDNode OpNode,
                          string Broadcast = _.BroadcastStr,

lib/Target/X86/X86InstrSSE.td

 
 class ShiftOpndItins<InstrItinClass arg_rr, InstrItinClass arg_rm,
   InstrItinClass arg_ri> {
   InstrItinClass rr = arg_rr;
   InstrItinClass rm = arg_rm;
   InstrItinClass ri = arg_ri;
 }
 
-
 // scalar
 let Sched = WriteFAdd in {
 def SSE_ALU_F32S : OpndItins<
   IIC_SSE_ALU_F32S_RR, IIC_SSE_ALU_F32S_RM
 >;
 
 def SSE_ALU_F64S : OpndItins<
   IIC_SSE_ALU_F64S_RR, IIC_SSE_ALU_F64S_RM
def Int_CVTSS2SDrm: I<0x5A, MRMSrcMem,
                     "cvtss2sd\t{$src2, $dst|$dst, $src2}",
                     [(set VR128:$dst,
                       (int_x86_sse2_cvtss2sd VR128:$src1, sse_load_f32:$src2))],
                     IIC_SSE_CVT_Scalar_RM>, XS, Requires<[UseSSE2]>,
                     Sched<[WriteCvtF2FLd, ReadAfterLd]>;
 }
 } // isCodeGenOnly = 1
 
+// Patterns used for matching (v)cvtsi2ss, (v)cvtsi2sd, (v)cvtsd2ss and
+// (v)cvtss2sd intrinsic sequences from clang which produce unnecsessary
+// vmovs{s,d} instructions
+let Predicates = [UseAVX] in {
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128:$dst),
+                   (v4f32 (scalar_to_vector
+                     (f32 (fpround (f64 (extractelt VR128:$src, (iPTR 0))))))))),
+          (Int_VCVTSD2SSrr VR128:$dst, VR128:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128:$dst),
+                   (v2f64 (scalar_to_vector
+                     (f64 (fpextend (f32 (extractelt VR128:$src, (iPTR 0))))))))),
+          (Int_VCVTSS2SDrr VR128:$dst, VR128:$src)>;
+
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128:$dst),
+                   (v4f32 (scalar_to_vector (f32 (sint_to_fp GR64:$src)))))),
+          (Int_VCVTSI2SS64rr VR128:$dst, GR64:$src)>;
+
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128:$dst),
+                   (v4f32 (scalar_to_vector (f32 (sint_to_fp GR32:$src)))))),
+          (Int_VCVTSI2SSrr VR128:$dst, GR32:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128:$dst),
+                   (v2f64 (scalar_to_vector (f64 (sint_to_fp GR64:$src)))))),
+          (Int_VCVTSI2SD64rr VR128:$dst, GR64:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128:$dst),
+                   (v2f64 (scalar_to_vector (f64 (sint_to_fp GR32:$src)))))),
+          (Int_VCVTSI2SDrr VR128:$dst, GR32:$src)>;
+} // Predicates = [UseAVX]
+let Predicates = [UseSSE2] in {
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128:$dst),
+                   (v4f32 (scalar_to_vector
+                     (f32 (fpround (f64 (extractelt VR128:$src, (iPTR 0))))))))),
+          (Int_CVTSD2SSrr VR128:$dst, VR128:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128:$dst),
+                   (v2f64 (scalar_to_vector
+                     (f64 (fpextend (f32 (extractelt VR128:$src, (iPTR 0))))))))),
+          (Int_CVTSS2SDrr VR128:$dst, VR128:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128:$dst),
+                   (v2f64 (scalar_to_vector (f64 (sint_to_fp GR64:$src)))))),
+          (Int_CVTSI2SD64rr VR128:$dst, GR64:$src)>;
+
+def : Pat<(v2f64 (X86Movsd
+                   (v2f64 VR128:$dst),
+                   (v2f64 (scalar_to_vector (f64 (sint_to_fp GR32:$src)))))),
+          (Int_CVTSI2SDrr VR128:$dst, GR32:$src)>;
+} // Predicates = [UseSSE2]
+let Predicates = [UseSSE1] in {
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128:$dst),
+                   (v4f32 (scalar_to_vector (f32 (sint_to_fp GR64:$src)))))),
+          (Int_CVTSI2SS64rr VR128:$dst, GR64:$src)>;
+
+def : Pat<(v4f32 (X86Movss
+                   (v4f32 VR128:$dst),
+                   (v4f32 (scalar_to_vector (f32 (sint_to_fp GR32:$src)))))),
+          (Int_CVTSI2SSrr VR128:$dst, GR32:$src)>;
+} // Predicates = [UseSSE1]
+
 // Convert packed single/double fp to doubleword
 def VCVTPS2DQrr : VPDI<0x5B, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
                        "cvtps2dq\t{$src, $dst|$dst, $src}",
                        [(set VR128:$dst, (int_x86_sse2_cvtps2dq VR128:$src))],
                        IIC_SSE_CVT_PS_RR>, VEX, Sched<[WriteCvtF2I]>;
 def VCVTPS2DQrm : VPDI<0x5B, MRMSrcMem, (outs VR128:$dst), (ins f128mem:$src),
                        "cvtps2dq\t{$src, $dst|$dst, $src}",
                        [(set VR128:$dst,

test/CodeGen/X86/avx-cvt.ll

 ; CHECK-NEXT:    vcvtpd2ps %ymm0, %xmm0
 ; CHECK-NEXT:    vcvtpd2ps %ymm1, %xmm1
 ; CHECK-NEXT:    vinsertf128 $1, %xmm1, %ymm0, %ymm0
 ; CHECK-NEXT:    retq
   %a = fptrunc <8 x double> %b to <8 x float>
   ret <8 x float> %a
 }
 
+define <4 x float> @fptrunc01(<2 x double> %a0, <4 x float> %a1) nounwind {
+; CHECK-LABEL: fptrunc01:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    vcvtsd2ss %xmm0, %xmm1, %xmm0
+; CHECK-NEXT:    retq
+  %ext = extractelement <2 x double> %a0, i32 0
+  %cvt = fptrunc double %ext to float
+  %res = insertelement <4 x float> %a1, float %cvt, i32 0
+  ret <4 x float> %res
+}
+
 define <4 x double> @fpext00(<4 x float> %b) nounwind {
 ; CHECK-LABEL: fpext00:
 ; CHECK:       # BB#0:
 ; CHECK-NEXT:    vcvtps2pd %xmm0, %ymm0
 ; CHECK-NEXT:    retq
   %a = fpext <4 x float> %b to <4 x double>
   ret <4 x double> %a
 }
 
+define <2 x double> @fpext01(<2 x double> %a0, <4 x float> %a1) nounwind {
+; CHECK-LABEL: fpext01:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    vcvtss2sd %xmm1, %xmm0, %xmm0
+; CHECK-NEXT:    retq
+  %ext = extractelement <4 x float> %a1, i32 0
+  %cvt = fpext float %ext to double
+  %res = insertelement <2 x double> %a0, double %cvt, i32 0
+  ret <2 x double> %res
+}
+
 define double @funcA(i64* nocapture %e) nounwind uwtable readonly ssp {
 ; CHECK-LABEL: funcA:
 ; CHECK:       # BB#0:
 ; CHECK-NEXT:    vcvtsi2sdq (%rdi), %xmm0, %xmm0
 ; CHECK-NEXT:    retq
   %tmp1 = load i64, i64* %e, align 8
   %conv = sitofp i64 %tmp1 to double
   ret double %conv

test/CodeGen/X86/avx512-cvt.ll

 ; SKX-NEXT:    vptestmd %xmm1, %xmm1, %k1
 ; SKX-NEXT:    vcvtpd2ps %ymm0, %xmm0 {%k1} {z}
 ; SKX-NEXT:    retq
   %a = fptrunc <4 x double> %b to <4 x float>
   %c = select <4 x i1>%mask, <4 x float>%a, <4 x float> zeroinitializer
   ret <4 x float> %c
 }
 
+define <4 x float> @fptrunc03(<2 x double> %a0, <4 x float> %a1) nounwind {
+; ALL-LABEL: fptrunc03:
+; ALL:       ## BB#0:
+; ALL-NEXT:    vcvtsd2ss %xmm0, %xmm1, %xmm0
+; ALL-NEXT:    retq
+  %ext = extractelement <2 x double> %a0, i32 0
+  %cvt = fptrunc double %ext to float
+  %res = insertelement <4 x float> %a1, float %cvt, i32 0
+  ret <4 x float> %res
+}
+
 define <8 x double> @fpext00(<8 x float> %b) nounwind {
 ; ALL-LABEL: fpext00:
 ; ALL:       ## BB#0:
 ; ALL-NEXT:    vcvtps2pd %ymm0, %zmm0
 ; ALL-NEXT:    retq
   %a = fpext <8 x float> %b to <8 x double>
   ret <8 x double> %a
 }

 ; SKX-NEXT:    vcvtps2pd %xmm0, %ymm0 {%k1} {z}
 ; SKX-NEXT:    retq
   %a = fpext <4 x float> %b to <4 x double>
   %mask = fcmp ogt <4 x double>%a1, %b1
   %c = select <4 x i1>%mask,  <4 x double>%a, <4 x double>zeroinitializer
   ret <4 x double> %c
 }
 
+define <2 x double> @fpext02(<2 x double> %a0, <4 x float> %a1) nounwind {
+; ALL-LABEL: fpext02:
+; ALL:       ## BB#0:
+; ALL-NEXT:    vcvtss2sd %xmm1, %xmm0, %xmm0
+; ALL-NEXT:    retq
+  %ext = extractelement <4 x float> %a1, i32 0
+  %cvt = fpext float %ext to double
+  %res = insertelement <2 x double> %a0, double %cvt, i32 0
+  ret <2 x double> %res
+}
+
 define double @funcA(i64* nocapture %e) {
 ; ALL-LABEL: funcA:
 ; ALL:       ## BB#0: ## %entry
 ; ALL-NEXT:    vcvtsi2sdq (%rdi), %xmm0, %xmm0
 ; ALL-NEXT:    retq
 entry:
   %tmp1 = load i64, i64* %e, align 8
   %conv = sitofp i64 %tmp1 to double

test/CodeGen/X86/sse2-intrinsics-fast-isel.ll

; X64-NEXT:    retq
   %arg0 = bitcast <2 x i64> %a0 to <4 x i32>
   %res = extractelement <4 x i32> %arg0, i32 0
   ret i32 %res
 }
 
 define <2 x double> @test_mm_cvtsi32_sd(<2 x double> %a0, i32 %a1) nounwind {
 ; X32-LABEL: test_mm_cvtsi32_sd:
 ; X32:       # BB#0:
-; X32-NEXT:    movl {{[0-9]+}}(%esp), %eax
-; X32-NEXT:    cvtsi2sdl %eax, %xmm1
-; X32-NEXT:    movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; X32-NEXT:    cvtsi2sdl {{[0-9]+}}(%esp), %xmm0
 ; X32-NEXT:    retl
 ;
 ; X64-LABEL: test_mm_cvtsi32_sd:
 ; X64:       # BB#0:
-; X64-NEXT:    cvtsi2sdl %edi, %xmm1
-; X64-NEXT:    movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; X64-NEXT:    cvtsi2sdl %edi, %xmm0
 ; X64-NEXT:    retq
   %cvt = sitofp i32 %a1 to double
   %res = insertelement <2 x double> %a0, double %cvt, i32 0
   ret <2 x double> %res
 }
 
 define <2 x i64> @test_mm_cvtsi32_si128(i32 %a0) nounwind {
 ; X32-LABEL: test_mm_cvtsi32_si128:
; X64-NEXT:    retq
   %res3 = insertelement <4 x i32> %res2, i32 0, i32 3
   %res = bitcast <4 x i32> %res3 to <2 x i64>
   ret <2 x i64> %res
 }
 
 define <2 x double> @test_mm_cvtss_sd(<2 x double> %a0, <4 x float> %a1) nounwind {
 ; X32-LABEL: test_mm_cvtss_sd:
 ; X32:       # BB#0:
-; X32-NEXT:    cvtss2sd %xmm1, %xmm1
-; X32-NEXT:    movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; X32-NEXT:    cvtss2sd %xmm1, %xmm0
 ; X32-NEXT:    retl
 ;
 ; X64-LABEL: test_mm_cvtss_sd:
 ; X64:       # BB#0:
-; X64-NEXT:    cvtss2sd %xmm1, %xmm1
-; X64-NEXT:    movsd {{.*#+}} xmm0 = xmm1[0],xmm0[1]
+; X64-NEXT:    cvtss2sd %xmm1, %xmm0
 ; X64-NEXT:    retq
   %ext = extractelement <4 x float> %a1, i32 0
   %cvt = fpext float %ext to double
   %res = insertelement <2 x double> %a0, double %cvt, i32 0
   ret <2 x double> %res
 }
 
 define <2 x i64> @test_mm_cvttpd_epi32(<2 x double> %a0) nounwind {

test/CodeGen/X86/vec_int_to_fp.ll

 ; AVX512-NEXT:    retq
  %1 = load %Arguments, %Arguments* %a0, align 1
  %2 = extractvalue %Arguments %1, 1
  %3 = extractvalue %Arguments %1, 2
  %4 = sitofp <8 x i16> %2 to <8 x float>
  store <8 x float> %4, <8 x float>* %3, align 32
  ret void
 }
+
+define <2 x double> @sitofp_i32_to_2f64(<2 x double> %a0, i32 %a1) nounwind {
+; SSE-LABEL: sitofp_i32_to_2f64:
+; SSE:       # BB#0:
+; SSE-NEXT:    cvtsi2sdl %edi, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: sitofp_i32_to_2f64:
+; AVX:       # BB#0:
+; AVX-NEXT:    vcvtsi2sdl %edi, %xmm0, %xmm0
+; AVX-NEXT:    retq
+  %cvt = sitofp i32 %a1 to double
+  %res = insertelement <2 x double> %a0, double %cvt, i32 0
+  ret <2 x double> %res
+}
+
+define <4 x float> @sitofp_i32_to_4f32(<4 x float> %a0, i32 %a1) nounwind {
+; SSE-LABEL: sitofp_i32_to_4f32:
+; SSE:       # BB#0:
+; SSE-NEXT:    cvtsi2ssl %edi, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: sitofp_i32_to_4f32:
+; AVX:       # BB#0:
+; AVX-NEXT:    vcvtsi2ssl %edi, %xmm0, %xmm0
+; AVX-NEXT:    retq
+  %cvt = sitofp i32 %a1 to float
+  %res = insertelement <4 x float> %a0, float %cvt, i32 0
+  ret <4 x float> %res
+}
+
+define <2 x double> @sitofp_i64_to_2f64(<2 x double> %a0, i64 %a1) nounwind {
+; SSE-LABEL: sitofp_i64_to_2f64:
+; SSE:       # BB#0:
+; SSE-NEXT:    cvtsi2sdq %rdi, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: sitofp_i64_to_2f64:
+; AVX:       # BB#0:
+; AVX-NEXT:    vcvtsi2sdq %rdi, %xmm0, %xmm0
+; AVX-NEXT:    retq
+  %cvt = sitofp i64 %a1 to double
+  %res = insertelement <2 x double> %a0, double %cvt, i32 0
+  ret <2 x double> %res
+}
+
+define <4 x float> @sitofp_i64_to_4f32(<4 x float> %a0, i64 %a1) nounwind {
+; SSE-LABEL: sitofp_i64_to_4f32:
+; SSE:       # BB#0:
+; SSE-NEXT:    cvtsi2ssq %rdi, %xmm0
+; SSE-NEXT:    retq
+;
+; AVX-LABEL: sitofp_i64_to_4f32:
+; AVX:       # BB#0:
+; AVX-NEXT:    vcvtsi2ssq %rdi, %xmm0, %xmm0
+; AVX-NEXT:    retq
+  %cvt = sitofp i64 %a1 to float
+  %res = insertelement <4 x float> %a0, float %cvt, i32 0
+  ret <4 x float> %res
+}