[x86] allow narrowing of vector UINT_TO_FP
As discussed in:
D56864
D58197
Always use the narrow (128-bit) instruction when possible.
We already had the signed int version of this transform.
llvm-svn: 354675
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 704e150..731e516 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -42016,6 +42016,11 @@
InVec.getOperand(0).getValueType() == MVT::v4i32) {
return DAG.getNode(X86ISD::CVTSI2P, SDLoc(N), VT, InVec.getOperand(0));
}
+ // v2f64 CVTUDQ2PD(v4i32).
+ if (InOpcode == ISD::UINT_TO_FP &&
+ InVec.getOperand(0).getValueType() == MVT::v4i32) {
+ return DAG.getNode(X86ISD::CVTUI2P, SDLoc(N), VT, InVec.getOperand(0));
+ }
// v2f64 CVTPS2PD(v4f32).
if (InOpcode == ISD::FP_EXTEND &&
InVec.getOperand(0).getValueType() == MVT::v4f32) {
diff --git a/llvm/test/CodeGen/X86/vec_int_to_fp-widen.ll b/llvm/test/CodeGen/X86/vec_int_to_fp-widen.ll
index 7441ce5..41524f3 100644
--- a/llvm/test/CodeGen/X86/vec_int_to_fp-widen.ll
+++ b/llvm/test/CodeGen/X86/vec_int_to_fp-widen.ll
@@ -684,9 +684,7 @@
;
; AVX512VL-LABEL: uitofp_4i32_to_2f64:
; AVX512VL: # %bb.0:
-; AVX512VL-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VL-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VL-NEXT: vzeroupper
+; AVX512VL-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VL-NEXT: retq
;
; AVX512DQ-LABEL: uitofp_4i32_to_2f64:
@@ -699,9 +697,7 @@
;
; AVX512VLDQ-LABEL: uitofp_4i32_to_2f64:
; AVX512VLDQ: # %bb.0:
-; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VLDQ-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VLDQ-NEXT: vzeroupper
+; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VLDQ-NEXT: retq
%cvt = uitofp <4 x i32> %a to <4 x double>
%shuf = shufflevector <4 x double> %cvt, <4 x double> undef, <2 x i32> <i32 0, i32 1>
diff --git a/llvm/test/CodeGen/X86/vec_int_to_fp.ll b/llvm/test/CodeGen/X86/vec_int_to_fp.ll
index ab3fd39..02b55f3 100644
--- a/llvm/test/CodeGen/X86/vec_int_to_fp.ll
+++ b/llvm/test/CodeGen/X86/vec_int_to_fp.ll
@@ -684,9 +684,7 @@
;
; AVX512VL-LABEL: uitofp_4i32_to_2f64:
; AVX512VL: # %bb.0:
-; AVX512VL-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VL-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VL-NEXT: vzeroupper
+; AVX512VL-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VL-NEXT: retq
;
; AVX512DQ-LABEL: uitofp_4i32_to_2f64:
@@ -699,9 +697,7 @@
;
; AVX512VLDQ-LABEL: uitofp_4i32_to_2f64:
; AVX512VLDQ: # %bb.0:
-; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VLDQ-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VLDQ-NEXT: vzeroupper
+; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VLDQ-NEXT: retq
%cvt = uitofp <4 x i32> %a to <4 x double>
%shuf = shufflevector <4 x double> %cvt, <4 x double> undef, <2 x i32> <i32 0, i32 1>
@@ -5699,9 +5695,7 @@
;
; AVX512VL-LABEL: extract0_uitofp_v4i32_f64:
; AVX512VL: # %bb.0:
-; AVX512VL-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VL-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VL-NEXT: vzeroupper
+; AVX512VL-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VL-NEXT: retq
;
; AVX512DQ-LABEL: extract0_uitofp_v4i32_f64:
@@ -5714,9 +5708,7 @@
;
; AVX512VLDQ-LABEL: extract0_uitofp_v4i32_f64:
; AVX512VLDQ: # %bb.0:
-; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VLDQ-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VLDQ-NEXT: vzeroupper
+; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VLDQ-NEXT: retq
%e = extractelement <4 x i32> %x, i32 0
%r = uitofp i32 %e to double
@@ -5855,9 +5847,7 @@
; AVX512VL-LABEL: extract3_uitofp_v4i32_f64:
; AVX512VL: # %bb.0:
; AVX512VL-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[3,1,2,3]
-; AVX512VL-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VL-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VL-NEXT: vzeroupper
+; AVX512VL-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VL-NEXT: retq
;
; AVX512DQ-LABEL: extract3_uitofp_v4i32_f64:
@@ -5871,9 +5861,7 @@
; AVX512VLDQ-LABEL: extract3_uitofp_v4i32_f64:
; AVX512VLDQ: # %bb.0:
; AVX512VLDQ-NEXT: vpermilps {{.*#+}} xmm0 = xmm0[3,1,2,3]
-; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %ymm0
-; AVX512VLDQ-NEXT: # kill: def $xmm0 killed $xmm0 killed $ymm0
-; AVX512VLDQ-NEXT: vzeroupper
+; AVX512VLDQ-NEXT: vcvtudq2pd %xmm0, %xmm0
; AVX512VLDQ-NEXT: retq
%e = extractelement <4 x i32> %x, i32 3
%r = uitofp i32 %e to double
