Index: llvm/include/llvm/ADT/APFloat.h
===================================================================
--- llvm/include/llvm/ADT/APFloat.h
+++ llvm/include/llvm/ADT/APFloat.h
@@ -273,6 +273,11 @@
   static unsigned int semanticsSizeInBits(const fltSemantics &);
   static unsigned int semanticsIntSizeInBits(const fltSemantics&, bool);
 
+  // Returns true if any number described by \p Src can be precisely represented
+  // by a normal (not subnormal) value in \p Dst.
+  static bool isRepresentableAsNormalIn(const fltSemantics &Src,
+                                        const fltSemantics &Dst);
+
   /// Returns the size of the floating point number (in bits) in the given
   /// semantics.
   static unsigned getSizeInBits(const fltSemantics &Sem);
Index: llvm/lib/Analysis/ValueTracking.cpp
===================================================================
--- llvm/lib/Analysis/ValueTracking.cpp
+++ llvm/lib/Analysis/ValueTracking.cpp
@@ -4614,6 +4614,25 @@
 
     break;
   }
+  case Instruction::FPExt: {
+    // Infinity, nan and zero propagate from source.
+    computeKnownFPClass(Op->getOperand(0), DemandedElts, InterestedClasses,
+                        Known, Depth + 1, Q, TLI);
+
+    const fltSemantics &DstTy =
+        Op->getType()->getScalarType()->getFltSemantics();
+    const fltSemantics &SrcTy =
+        Op->getOperand(0)->getType()->getScalarType()->getFltSemantics();
+
+    // All subnormal inputs should be in the normal range in the result type.
+    if (APFloat::isRepresentableAsNormalIn(SrcTy, DstTy))
+      Known.knownNot(fcSubnormal);
+
+    // Sign bit of a nan isn't guaranteed.
+    if (!Known.isKnownNeverNaN())
+      Known.SignBit = std::nullopt;
+    break;
+  }
   case Instruction::FPTrunc: {
     if ((InterestedClasses & fcNan) == fcNone)
       break;
Index: llvm/lib/Support/APFloat.cpp
===================================================================
--- llvm/lib/Support/APFloat.cpp
+++ llvm/lib/Support/APFloat.cpp
@@ -308,6 +308,20 @@
   return MinBitWidth;
 }
 
+bool APFloatBase::isRepresentableAsNormalIn(const fltSemantics &Src,
+                                            const fltSemantics &Dst) {
+  // Exponent range must be larger.
+  if (Src.maxExponent >= Dst.maxExponent || Src.minExponent <= Dst.minExponent)
+    return false;
+
+  // If the mantissa is long enough, the result value could still be denormal
+  // with a larger exponent range.
+  //
+  // FIXME: This condition is probably not accurate but also shouldn't be a
+  // practical concern with existing types.
+  return Dst.precision >= Src.precision;
+}
+
 unsigned APFloatBase::getSizeInBits(const fltSemantics &Sem) {
   return Sem.sizeInBits;
 }
Index: llvm/test/Transforms/Attributor/nofpclass-fpext.ll
===================================================================
--- llvm/test/Transforms/Attributor/nofpclass-fpext.ll
+++ llvm/test/Transforms/Attributor/nofpclass-fpext.ll
@@ -2,7 +2,7 @@
 ; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
 
 define double @ret_fpext_f32_to_f64(float %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64
+; CHECK-LABEL: define nofpclass(sub) double @ret_fpext_f32_to_f64
 ; CHECK-SAME: (float [[ARG0:%.*]]) #[[ATTR0:[0-9]+]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -12,7 +12,7 @@
 }
 
 define <2 x double> @ret_fpext_v2f32_to_v2f64(<2 x float> %arg0) {
-; CHECK-LABEL: define <2 x double> @ret_fpext_v2f32_to_v2f64
+; CHECK-LABEL: define nofpclass(sub) <2 x double> @ret_fpext_v2f32_to_v2f64
 ; CHECK-SAME: (<2 x float> [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext <2 x float> [[ARG0]] to <2 x double>
 ; CHECK-NEXT:    ret <2 x double> [[EXT]]
@@ -22,7 +22,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nonan(float nofpclass(nan) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nonan
+; CHECK-LABEL: define nofpclass(nan sub) double @ret_fpext_f32_to_f64_nonan
 ; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -32,7 +32,7 @@
 }
 
 define <2 x double> @ret_fpext_v2f32_to_v2f64_nonan(<2 x float> nofpclass(nan) %arg0) {
-; CHECK-LABEL: define <2 x double> @ret_fpext_v2f32_to_v2f64_nonan
+; CHECK-LABEL: define nofpclass(nan sub) <2 x double> @ret_fpext_v2f32_to_v2f64_nonan
 ; CHECK-SAME: (<2 x float> nofpclass(nan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext <2 x float> [[ARG0]] to <2 x double>
 ; CHECK-NEXT:    ret <2 x double> [[EXT]]
@@ -42,7 +42,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_noqnan(float nofpclass(qnan) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_noqnan
+; CHECK-LABEL: define nofpclass(qnan sub) double @ret_fpext_f32_to_f64_noqnan
 ; CHECK-SAME: (float nofpclass(qnan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -52,7 +52,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nosnan(float nofpclass(snan) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nosnan
+; CHECK-LABEL: define nofpclass(snan sub) double @ret_fpext_f32_to_f64_nosnan
 ; CHECK-SAME: (float nofpclass(snan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -62,7 +62,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_noinf(float nofpclass(inf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_noinf
+; CHECK-LABEL: define nofpclass(inf sub) double @ret_fpext_f32_to_f64_noinf
 ; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -72,7 +72,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nopinf(float nofpclass(pinf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nopinf
+; CHECK-LABEL: define nofpclass(pinf sub) double @ret_fpext_f32_to_f64_nopinf
 ; CHECK-SAME: (float nofpclass(pinf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -82,7 +82,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_noninf(float nofpclass(ninf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_noninf
+; CHECK-LABEL: define nofpclass(ninf sub) double @ret_fpext_f32_to_f64_noninf
 ; CHECK-SAME: (float nofpclass(ninf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -92,7 +92,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nozero(float nofpclass(zero) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nozero
+; CHECK-LABEL: define nofpclass(zero sub) double @ret_fpext_f32_to_f64_nozero
 ; CHECK-SAME: (float nofpclass(zero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -102,7 +102,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nopzero(float nofpclass(pzero) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nopzero
+; CHECK-LABEL: define nofpclass(pzero sub) double @ret_fpext_f32_to_f64_nopzero
 ; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -112,7 +112,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nonzero(float nofpclass(nzero) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nonzero
+; CHECK-LABEL: define nofpclass(nzero sub) double @ret_fpext_f32_to_f64_nonzero
 ; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -122,7 +122,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nonan_noinf(float nofpclass(nan inf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nonan_noinf
+; CHECK-LABEL: define nofpclass(nan inf sub) double @ret_fpext_f32_to_f64_nonan_noinf
 ; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -132,7 +132,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nosub(float nofpclass(sub) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nosub
+; CHECK-LABEL: define nofpclass(sub) double @ret_fpext_f32_to_f64_nosub
 ; CHECK-SAME: (float nofpclass(sub) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -142,7 +142,7 @@
 }
 
 define double @ret_fpext_f32_to_f64_nonorm(float nofpclass(norm) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_f32_to_f64_nonorm
+; CHECK-LABEL: define nofpclass(sub norm) double @ret_fpext_f32_to_f64_nonorm
 ; CHECK-SAME: (float nofpclass(norm) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext float [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -172,7 +172,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nonan(bfloat nofpclass(nan) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nonan
+; CHECK-LABEL: define nofpclass(nan) float @ret_fpext_bf16_f32_nonan
 ; CHECK-SAME: (bfloat nofpclass(nan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -182,7 +182,7 @@
 }
 
 define <2 x float> @ret_fpext_v2bf16_v2f32_nonan(<2 x bfloat> nofpclass(nan) %arg0) {
-; CHECK-LABEL: define <2 x float> @ret_fpext_v2bf16_v2f32_nonan
+; CHECK-LABEL: define nofpclass(nan) <2 x float> @ret_fpext_v2bf16_v2f32_nonan
 ; CHECK-SAME: (<2 x bfloat> nofpclass(nan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext <2 x bfloat> [[ARG0]] to <2 x float>
 ; CHECK-NEXT:    ret <2 x float> [[EXT]]
@@ -192,7 +192,7 @@
 }
 
 define float @ret_fpext_bf16_f32_noqnan(bfloat nofpclass(qnan) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_noqnan
+; CHECK-LABEL: define nofpclass(qnan) float @ret_fpext_bf16_f32_noqnan
 ; CHECK-SAME: (bfloat nofpclass(qnan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -202,7 +202,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nosnan(bfloat nofpclass(snan) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nosnan
+; CHECK-LABEL: define nofpclass(snan) float @ret_fpext_bf16_f32_nosnan
 ; CHECK-SAME: (bfloat nofpclass(snan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -212,7 +212,7 @@
 }
 
 define float @ret_fpext_bf16_f32_noinf(bfloat nofpclass(inf) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_noinf
+; CHECK-LABEL: define nofpclass(inf) float @ret_fpext_bf16_f32_noinf
 ; CHECK-SAME: (bfloat nofpclass(inf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -222,7 +222,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nopinf(bfloat nofpclass(pinf) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nopinf
+; CHECK-LABEL: define nofpclass(pinf) float @ret_fpext_bf16_f32_nopinf
 ; CHECK-SAME: (bfloat nofpclass(pinf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -232,7 +232,7 @@
 }
 
 define float @ret_fpext_bf16_f32_noninf(bfloat nofpclass(ninf) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_noninf
+; CHECK-LABEL: define nofpclass(ninf) float @ret_fpext_bf16_f32_noninf
 ; CHECK-SAME: (bfloat nofpclass(ninf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -242,7 +242,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nozero(bfloat nofpclass(zero) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nozero
+; CHECK-LABEL: define nofpclass(zero) float @ret_fpext_bf16_f32_nozero
 ; CHECK-SAME: (bfloat nofpclass(zero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -252,7 +252,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nopzero(bfloat nofpclass(pzero) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nopzero
+; CHECK-LABEL: define nofpclass(pzero) float @ret_fpext_bf16_f32_nopzero
 ; CHECK-SAME: (bfloat nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -262,7 +262,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nonzero(bfloat nofpclass(nzero) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nonzero
+; CHECK-LABEL: define nofpclass(nzero) float @ret_fpext_bf16_f32_nonzero
 ; CHECK-SAME: (bfloat nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -272,7 +272,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nonan_noinf(bfloat nofpclass(nan inf) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nonan_noinf
+; CHECK-LABEL: define nofpclass(nan inf) float @ret_fpext_bf16_f32_nonan_noinf
 ; CHECK-SAME: (bfloat nofpclass(nan inf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -282,7 +282,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nosub(bfloat nofpclass(sub) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nosub
+; CHECK-LABEL: define nofpclass(sub) float @ret_fpext_bf16_f32_nosub
 ; CHECK-SAME: (bfloat nofpclass(sub) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -292,7 +292,7 @@
 }
 
 define float @ret_fpext_bf16_f32_nonorm(bfloat nofpclass(norm) %arg0) {
-; CHECK-LABEL: define float @ret_fpext_bf16_f32_nonorm
+; CHECK-LABEL: define nofpclass(norm) float @ret_fpext_bf16_f32_nonorm
 ; CHECK-SAME: (bfloat nofpclass(norm) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to float
 ; CHECK-NEXT:    ret float [[EXT]]
@@ -302,7 +302,7 @@
 }
 
 define double @ret_fpext_bf16_f64(bfloat %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64
+; CHECK-LABEL: define nofpclass(sub) double @ret_fpext_bf16_f64
 ; CHECK-SAME: (bfloat [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -312,7 +312,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nonan(bfloat nofpclass(nan) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nonan
+; CHECK-LABEL: define nofpclass(nan sub) double @ret_fpext_bf16_f64_nonan
 ; CHECK-SAME: (bfloat nofpclass(nan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -322,7 +322,7 @@
 }
 
 define double @ret_fpext_bf16_f64_noqnan(bfloat nofpclass(qnan) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_noqnan
+; CHECK-LABEL: define nofpclass(qnan sub) double @ret_fpext_bf16_f64_noqnan
 ; CHECK-SAME: (bfloat nofpclass(qnan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -332,7 +332,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nosnan(bfloat nofpclass(snan) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nosnan
+; CHECK-LABEL: define nofpclass(snan sub) double @ret_fpext_bf16_f64_nosnan
 ; CHECK-SAME: (bfloat nofpclass(snan) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -342,7 +342,7 @@
 }
 
 define double @ret_fpext_bf16_f64_noinf(bfloat nofpclass(inf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_noinf
+; CHECK-LABEL: define nofpclass(inf sub) double @ret_fpext_bf16_f64_noinf
 ; CHECK-SAME: (bfloat nofpclass(inf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -352,7 +352,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nopinf(bfloat nofpclass(pinf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nopinf
+; CHECK-LABEL: define nofpclass(pinf sub) double @ret_fpext_bf16_f64_nopinf
 ; CHECK-SAME: (bfloat nofpclass(pinf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -362,7 +362,7 @@
 }
 
 define double @ret_fpext_bf16_f64_noninf(bfloat nofpclass(ninf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_noninf
+; CHECK-LABEL: define nofpclass(ninf sub) double @ret_fpext_bf16_f64_noninf
 ; CHECK-SAME: (bfloat nofpclass(ninf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -372,7 +372,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nozero(bfloat nofpclass(zero) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nozero
+; CHECK-LABEL: define nofpclass(zero sub) double @ret_fpext_bf16_f64_nozero
 ; CHECK-SAME: (bfloat nofpclass(zero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -382,7 +382,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nopzero(bfloat nofpclass(pzero) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nopzero
+; CHECK-LABEL: define nofpclass(pzero sub) double @ret_fpext_bf16_f64_nopzero
 ; CHECK-SAME: (bfloat nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -392,7 +392,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nonzero(bfloat nofpclass(nzero) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nonzero
+; CHECK-LABEL: define nofpclass(nzero sub) double @ret_fpext_bf16_f64_nonzero
 ; CHECK-SAME: (bfloat nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -402,7 +402,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nonan_noinf(bfloat nofpclass(nan inf) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nonan_noinf
+; CHECK-LABEL: define nofpclass(nan inf sub) double @ret_fpext_bf16_f64_nonan_noinf
 ; CHECK-SAME: (bfloat nofpclass(nan inf) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -412,7 +412,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nosub(bfloat nofpclass(sub) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nosub
+; CHECK-LABEL: define nofpclass(sub) double @ret_fpext_bf16_f64_nosub
 ; CHECK-SAME: (bfloat nofpclass(sub) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]
@@ -422,7 +422,7 @@
 }
 
 define double @ret_fpext_bf16_f64_nonorm(bfloat nofpclass(norm) %arg0) {
-; CHECK-LABEL: define double @ret_fpext_bf16_f64_nonorm
+; CHECK-LABEL: define nofpclass(sub norm) double @ret_fpext_bf16_f64_nonorm
 ; CHECK-SAME: (bfloat nofpclass(norm) [[ARG0:%.*]]) #[[ATTR0]] {
 ; CHECK-NEXT:    [[EXT:%.*]] = fpext bfloat [[ARG0]] to double
 ; CHECK-NEXT:    ret double [[EXT]]