ValueTracking: Add baseline tests for vector fpclass handling

Author: arsenm

llvm/test/Transforms/Attributor/nofpclass.ll

@@ -100,14 +100,24 @@ define <2 x double> @returned_strange_constant_vector_elt() {
   ret <2 x double> <double -0.0, double bitcast (i64 ptrtoint (ptr @unknown to i64) to double)>
 }
 
-; Test a vector element that's an undef/poison
+; Test a vector element that's undef
 define <3 x double> @returned_undef_constant_vector_elt() {
-; CHECK-LABEL: define nofpclass(nan inf pzero sub norm) <3 x double> @returned_undef_constant_vector_elt() {
+; CHECK-LABEL: define nofpclass(nan inf sub norm) <3 x double> @returned_undef_constant_vector_elt() {
 ; CHECK-NEXT:    call void @unknown()
-; CHECK-NEXT:    ret <3 x double> <double -0.000000e+00, double poison, double undef>
+; CHECK-NEXT:    ret <3 x double> <double -0.000000e+00, double 0.000000e+00, double undef>
 ;
   call void @unknown()
-  ret <3 x double> <double -0.0, double poison, double undef>
+  ret <3 x double> <double -0.0, double 0.0, double undef>
+}
+
+; Test a vector element that's poison
+define <3 x double> @returned_poison_constant_vector_elt() {
+; CHECK-LABEL: define nofpclass(nan inf sub norm) <3 x double> @returned_poison_constant_vector_elt() {
+; CHECK-NEXT:    call void @unknown()
+; CHECK-NEXT:    ret <3 x double> <double -0.000000e+00, double 0.000000e+00, double poison>
+;
+  call void @unknown()
+  ret <3 x double> <double -0.0, double 0.0, double poison>
 }
 
 define <2 x double> @returned_qnan_zero_vector() {
@@ -1790,6 +1800,32 @@ define float @shufflevector_extractelt3(<2 x float> %arg0, <2 x float> nofpclass
   ret float %extract
 }
 
+define float @shufflevector_constantdatavector_demanded0() {
+; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
+; CHECK-LABEL: define nofpclass(snan inf nzero sub nnorm) float @shufflevector_constantdatavector_demanded0
+; CHECK-SAME: () #[[ATTR3]] {
+; CHECK-NEXT:    [[SHUFFLE:%.*]] = shufflevector <3 x float> <float 1.000000e+00, float 0x7FF8000000000000, float 0.000000e+00>, <3 x float> poison, <2 x i32> <i32 0, i32 2>
+; CHECK-NEXT:    [[EXTRACT:%.*]] = extractelement <2 x float> [[SHUFFLE]], i32 0
+; CHECK-NEXT:    ret float [[EXTRACT]]
+;
+  %shuffle = shufflevector <3 x float> <float 1.0, float 0x7FF8000000000000, float 0.0>, <3 x float> poison, <2 x i32> <i32 0, i32 2>
+  %extract = extractelement <2 x float> %shuffle, i32 0
+  ret float %extract
+}
+
+define float @shufflevector_constantdatavector_demanded1() {
+; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
+; CHECK-LABEL: define nofpclass(snan inf nzero sub nnorm) float @shufflevector_constantdatavector_demanded1
+; CHECK-SAME: () #[[ATTR3]] {
+; CHECK-NEXT:    [[SHUFFLE:%.*]] = shufflevector <3 x float> <float 1.000000e+00, float 0x7FF8000000000000, float 0.000000e+00>, <3 x float> poison, <2 x i32> <i32 0, i32 2>
+; CHECK-NEXT:    [[EXTRACT:%.*]] = extractelement <2 x float> [[SHUFFLE]], i32 1
+; CHECK-NEXT:    ret float [[EXTRACT]]
+;
+  %shuffle = shufflevector <3 x float> <float 1.0, float 0x7FF8000000000000, float 0.0>, <3 x float> poison, <2 x i32> <i32 0, i32 2>
+  %extract = extractelement <2 x float> %shuffle, i32 1
+  ret float %extract
+}
+
 define i32 @fptosi(float nofpclass(inf nan) %arg) {
 ; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
 ; CHECK-LABEL: define i32 @fptosi
@@ -2606,6 +2642,33 @@ bb:
   ret float %implement.pow
 }
 
+define [4 x float] @constant_aggregate_zero() {
+; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
+; CHECK-LABEL: define [4 x float] @constant_aggregate_zero
+; CHECK-SAME: () #[[ATTR3]] {
+; CHECK-NEXT:    ret [4 x float] zeroinitializer
+;
+  ret [4 x float] zeroinitializer
+}
+
+define <vscale x 4 x float> @scalable_splat_pnorm() {
+; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
+; CHECK-LABEL: define <vscale x 4 x float> @scalable_splat_pnorm
+; CHECK-SAME: () #[[ATTR3]] {
+; CHECK-NEXT:    ret <vscale x 4 x float> shufflevector (<vscale x 4 x float> insertelement (<vscale x 4 x float> poison, float 1.000000e+00, i64 0), <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer)
+;
+  ret <vscale x 4 x float> splat (float 1.0)
+}
+
+define <vscale x 4 x float> @scalable_splat_zero() {
+; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
+; CHECK-LABEL: define noundef <vscale x 4 x float> @scalable_splat_zero
+; CHECK-SAME: () #[[ATTR3]] {
+; CHECK-NEXT:    ret <vscale x 4 x float> zeroinitializer
+;
+  ret <vscale x 4 x float> zeroinitializer
+}
+
 declare i64 @_Z13get_global_idj(i32 noundef)
 
 attributes #0 = { "denormal-fp-math"="preserve-sign,preserve-sign" }