Index: llvm/lib/Analysis/ValueTracking.cpp
===================================================================
--- llvm/lib/Analysis/ValueTracking.cpp
+++ llvm/lib/Analysis/ValueTracking.cpp
@@ -5190,8 +5190,51 @@
     break;
   }
   case Instruction::ExtractValue: {
-    computeKnownFPClass(Op->getOperand(0), DemandedElts, InterestedClasses,
-                        Known, Depth + 1, Q, TLI);
+    const ExtractValueInst *Extract = cast<ExtractValueInst>(Op);
+    ArrayRef<unsigned> Indices = Extract->getIndices();
+    const Value *Src = Extract->getAggregateOperand();
+    if (isa<StructType>(Src->getType()) && Indices.size() == 1 &&
+        Indices[0] == 0) {
+      if (const auto *II = dyn_cast<IntrinsicInst>(Src)) {
+        switch (II->getIntrinsicID()) {
+        case Intrinsic::frexp : {
+          Known.knownNot(fcSubnormal);
+
+          KnownFPClass KnownSrc;
+          computeKnownFPClass(II->getArgOperand(0), DemandedElts,
+                              InterestedClasses, KnownSrc, Depth + 1, Q, TLI);
+
+          const Function *F = cast<Instruction>(Op)->getFunction();
+
+          if (KnownSrc.isKnownNever(fcNegative))
+            Known.knownNot(fcNegative);
+          else {
+            if (F && KnownSrc.isKnownNeverLogicalNegZero(*F, Op->getType()))
+              Known.knownNot(fcNegZero);
+            if (KnownSrc.isKnownNever(fcNegInf))
+              Known.knownNot(fcNegInf);
+          }
+
+          if (KnownSrc.isKnownNever(fcPositive))
+            Known.knownNot(fcPositive);
+          else {
+            if (F && KnownSrc.isKnownNeverLogicalPosZero(*F, Op->getType()))
+              Known.knownNot(fcPosZero);
+            if (KnownSrc.isKnownNever(fcPosInf))
+              Known.knownNot(fcPosInf);
+          }
+
+          Known.propagateNaN(KnownSrc);
+          return;
+        }
+        default:
+          break;
+        }
+      }
+    }
+
+    computeKnownFPClass(Src, DemandedElts, InterestedClasses, Known, Depth + 1,
+                        Q, TLI);
     break;
   }
   case Instruction::PHI: {
Index: llvm/test/Transforms/Attributor/nofpclass-frexp.ll
===================================================================
--- llvm/test/Transforms/Attributor/nofpclass-frexp.ll
+++ llvm/test/Transforms/Attributor/nofpclass-frexp.ll
@@ -7,8 +7,8 @@
 
 define { float, i32 } @ret_frexp_f32(float %arg0) {
 ; CHECK-LABEL: define { float, i32 } @ret_frexp_f32
-; CHECK-SAME: (float [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-SAME: (float [[ARG0:%.*]]) #[[ATTR1:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7:[0-9]+]]
 ; CHECK-NEXT:    ret { float, i32 } [[CALL]]
 ;
   %call = call { float, i32 } @llvm.frexp.f32.i32(float %arg0)
@@ -17,8 +17,8 @@
 
 define { float, i32 } @ret_frexp_f32_nonan(float nofpclass(nan) %arg0) {
 ; CHECK-LABEL: define { float, i32 } @ret_frexp_f32_nonan
-; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    ret { float, i32 } [[CALL]]
 ;
   %call = call { float, i32 } @llvm.frexp.f32.i32(float %arg0)
@@ -26,9 +26,9 @@
 }
 
 define float @ret_frexp_f32_0_nonan(float nofpclass(nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonan
-; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan sub) float @ret_frexp_f32_0_nonan
+; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -38,9 +38,9 @@
 }
 
 define float @ret_frexp_f32_0_nosnan(float nofpclass(snan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nosnan
-; CHECK-SAME: (float nofpclass(snan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(snan sub) float @ret_frexp_f32_0_nosnan
+; CHECK-SAME: (float nofpclass(snan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -50,9 +50,9 @@
 }
 
 define float @ret_frexp_f32_0_noqnan(float nofpclass(qnan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noqnan
-; CHECK-SAME: (float nofpclass(qnan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_noqnan
+; CHECK-SAME: (float nofpclass(qnan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -63,8 +63,8 @@
 
 define i32 @ret_frexp_f32_1_nonan(float nofpclass(nan) %arg0) {
 ; CHECK-LABEL: define i32 @ret_frexp_f32_1_nonan
-; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_1:%.*]] = extractvalue { float, i32 } [[CALL]], 1
 ; CHECK-NEXT:    ret i32 [[CALL_1]]
 ;
@@ -74,9 +74,9 @@
 }
 
 define <2 x float> @ret_frexp_v2f32_0_nonan(<2 x float> nofpclass(nan) %arg0) {
-; CHECK-LABEL: define <2 x float> @ret_frexp_v2f32_0_nonan
-; CHECK-SAME: (<2 x float> nofpclass(nan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float> [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan sub) <2 x float> @ret_frexp_v2f32_0_nonan
+; CHECK-SAME: (<2 x float> nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float> [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { <2 x float>, <2 x i32> } [[CALL]], 0
 ; CHECK-NEXT:    ret <2 x float> [[CALL_0]]
 ;
@@ -87,8 +87,8 @@
 
 define <2 x i32> @ret_frexp_v2f32_1_nonan(<2 x float> nofpclass(nan) %arg0) {
 ; CHECK-LABEL: define <2 x i32> @ret_frexp_v2f32_1_nonan
-; CHECK-SAME: (<2 x float> nofpclass(nan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float> [[ARG0]])
+; CHECK-SAME: (<2 x float> nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { <2 x float>, <2 x i32> } @llvm.frexp.v2f32.v2i32(<2 x float> [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { <2 x float>, <2 x i32> } [[CALL]], 1
 ; CHECK-NEXT:    ret <2 x i32> [[CALL_0]]
 ;
@@ -98,9 +98,9 @@
 }
 
 define float @ret_frexp_v4f32_0_nonan_elt1(<4 x float> nofpclass(nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_v4f32_0_nonan_elt1
-; CHECK-SAME: (<4 x float> nofpclass(nan) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { <4 x float>, <4 x i32> } @llvm.frexp.v4f32.v4i32(<4 x float> [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan sub) float @ret_frexp_v4f32_0_nonan_elt1
+; CHECK-SAME: (<4 x float> nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { <4 x float>, <4 x i32> } @llvm.frexp.v4f32.v4i32(<4 x float> [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { <4 x float>, <4 x i32> } [[CALL]], 0
 ; CHECK-NEXT:    [[ELT_2:%.*]] = extractelement <4 x float> [[CALL_0]], i32 2
 ; CHECK-NEXT:    ret float [[ELT_2]]
@@ -112,9 +112,9 @@
 }
 
 define float @ret_frexp_f32_0_nopos_nopzero(float nofpclass(pinf psub pnorm pzero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopos_nopzero
-; CHECK-SAME: (float nofpclass(pinf pzero psub pnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(pinf pzero sub pnorm) float @ret_frexp_f32_0_nopos_nopzero
+; CHECK-SAME: (float nofpclass(pinf pzero psub pnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -124,9 +124,9 @@
 }
 
 define float @ret_frexp_f32_0_nopos_nopzero_nonan(float nofpclass(pinf psub pnorm pzero nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopos_nopzero_nonan
-; CHECK-SAME: (float nofpclass(nan pinf pzero psub pnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan pinf pzero sub pnorm) float @ret_frexp_f32_0_nopos_nopzero_nonan
+; CHECK-SAME: (float nofpclass(nan pinf pzero psub pnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -136,9 +136,9 @@
 }
 
 define float @ret_frexp_f32_0_nopos(float nofpclass(pinf psub pnorm) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopos
-; CHECK-SAME: (float nofpclass(pinf psub pnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(pinf sub) float @ret_frexp_f32_0_nopos
+; CHECK-SAME: (float nofpclass(pinf psub pnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -148,9 +148,9 @@
 }
 
 define float @ret_frexp_f32_0_nopos_nonan(float nofpclass(pinf psub pnorm nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopos_nonan
-; CHECK-SAME: (float nofpclass(nan pinf psub pnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan pinf sub) float @ret_frexp_f32_0_nopos_nonan
+; CHECK-SAME: (float nofpclass(nan pinf psub pnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -160,9 +160,9 @@
 }
 
 define float @ret_frexp_f32_0_nopos_nozero(float nofpclass(pinf psub pnorm zero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopos_nozero
-; CHECK-SAME: (float nofpclass(pinf zero psub pnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(pinf zero sub pnorm) float @ret_frexp_f32_0_nopos_nozero
+; CHECK-SAME: (float nofpclass(pinf zero psub pnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -172,9 +172,9 @@
 }
 
 define float @ret_frexp_f32_0_noneg_nonzero(float nofpclass(ninf nsub nnorm nzero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noneg_nonzero
-; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(ninf nzero sub nnorm) float @ret_frexp_f32_0_noneg_nonzero
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -184,9 +184,9 @@
 }
 
 define float @ret_frexp_f32_0_noneg_nonzero_nonan(float nofpclass(ninf nsub nnorm nzero nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noneg_nonzero_nonan
-; CHECK-SAME: (float nofpclass(nan ninf nzero nsub nnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan ninf nzero sub nnorm) float @ret_frexp_f32_0_noneg_nonzero_nonan
+; CHECK-SAME: (float nofpclass(nan ninf nzero nsub nnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -196,9 +196,9 @@
 }
 
 define float @ret_frexp_f32_0_noneg(float nofpclass(ninf nsub nnorm) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noneg
-; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(ninf sub) float @ret_frexp_f32_0_noneg
+; CHECK-SAME: (float nofpclass(ninf nsub nnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -208,9 +208,9 @@
 }
 
 define float @ret_frexp_f32_0_noneg_nonan(float nofpclass(ninf nsub nnorm nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noneg_nonan
-; CHECK-SAME: (float nofpclass(nan ninf nsub nnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan ninf sub) float @ret_frexp_f32_0_noneg_nonan
+; CHECK-SAME: (float nofpclass(nan ninf nsub nnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -220,9 +220,9 @@
 }
 
 define float @ret_frexp_f32_0_noneg_nozero(float nofpclass(ninf nsub nnorm nzero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noneg_nozero
-; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(ninf nzero sub nnorm) float @ret_frexp_f32_0_noneg_nozero
+; CHECK-SAME: (float nofpclass(ninf nzero nsub nnorm) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -232,9 +232,9 @@
 }
 
 define float @ret_frexp_f32_0_nopzero(float nofpclass(pzero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopzero
-; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(pzero sub) float @ret_frexp_f32_0_nopzero
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -244,9 +244,9 @@
 }
 
 define float @ret_frexp_f32_0_nonzero(float nofpclass(nzero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonzero
-; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nzero sub) float @ret_frexp_f32_0_nonzero
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -256,9 +256,9 @@
 }
 
 define float @ret_frexp_f32_0_nozero(float nofpclass(zero) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nozero
-; CHECK-SAME: (float nofpclass(zero) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(zero sub) float @ret_frexp_f32_0_nozero
+; CHECK-SAME: (float nofpclass(zero) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -268,9 +268,9 @@
 }
 
 define float @ret_frexp_f32_0_nopinf(float nofpclass(pinf) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopinf
-; CHECK-SAME: (float nofpclass(pinf) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(pinf sub) float @ret_frexp_f32_0_nopinf
+; CHECK-SAME: (float nofpclass(pinf) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -280,9 +280,9 @@
 }
 
 define float @ret_frexp_f32_0_noninf(float nofpclass(ninf) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noninf
-; CHECK-SAME: (float nofpclass(ninf) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(ninf sub) float @ret_frexp_f32_0_noninf
+; CHECK-SAME: (float nofpclass(ninf) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -292,9 +292,9 @@
 }
 
 define float @ret_frexp_f32_0_noinf(float nofpclass(inf) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_noinf
-; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(inf sub) float @ret_frexp_f32_0_noinf
+; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -304,9 +304,9 @@
 }
 
 define float @ret_frexp_f32_0_nozero_nonan(float nofpclass(zero nan) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nozero_nonan
-; CHECK-SAME: (float nofpclass(nan zero) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan zero sub) float @ret_frexp_f32_0_nozero_nonan
+; CHECK-SAME: (float nofpclass(nan zero) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -316,9 +316,9 @@
 }
 
 define float @ret_frexp_f32_0_nozero_noinf(float nofpclass(zero inf) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nozero_noinf
-; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(inf zero sub) float @ret_frexp_f32_0_nozero_noinf
+; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -328,9 +328,9 @@
 }
 
 define float @ret_frexp_f32_0_nozero_nonan_noinf(float nofpclass(zero nan inf) %arg0) {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nozero_nonan_noinf
-; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]]) {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nan inf zero sub) float @ret_frexp_f32_0_nozero_nonan_noinf
+; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]]) #[[ATTR1]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -340,9 +340,9 @@
 }
 
 define float @ret_frexp_f32_0_nonzero_ftz_daz(float nofpclass(nzero) %arg0) #1 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonzero_ftz_daz
-; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR0:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nonzero_ftz_daz
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR2:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -352,9 +352,9 @@
 }
 
 define float @ret_frexp_f32_0_nonzero_ftpz_dapz(float nofpclass(nzero) %arg0) #2 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonzero_ftpz_dapz
-; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR1:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nzero sub) float @ret_frexp_f32_0_nonzero_ftpz_dapz
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR3:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -364,9 +364,9 @@
 }
 
 define float @ret_frexp_f32_0_nonzero_dynamic_dynamic(float nofpclass(nzero) %arg0) #3 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonzero_dynamic_dynamic
-; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR2:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nonzero_dynamic_dynamic
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR4:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -376,9 +376,9 @@
 }
 
 define float @ret_frexp_f32_0_nonzero_ieee_daz(float nofpclass(nzero) %arg0) #4 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonzero_ieee_daz
-; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR3:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nonzero_ieee_daz
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR5:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -388,9 +388,9 @@
 }
 
 define float @ret_frexp_f32_0_nonzero_daz_ieee(float nofpclass(nzero) %arg0) #5 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nonzero_daz_ieee
-; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR4:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(nzero sub) float @ret_frexp_f32_0_nonzero_daz_ieee
+; CHECK-SAME: (float nofpclass(nzero) [[ARG0:%.*]]) #[[ATTR6:[0-9]+]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -400,9 +400,9 @@
 }
 
 define float @ret_frexp_f32_0_nopzero_ftz_daz(float nofpclass(pzero) %arg0) #1 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopzero_ftz_daz
-; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR0]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nopzero_ftz_daz
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR2]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -412,9 +412,9 @@
 }
 
 define float @ret_frexp_f32_0_nopzero_ftpz_dapz(float nofpclass(pzero) %arg0) #2 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopzero_ftpz_dapz
-; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nopzero_ftpz_dapz
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR3]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -424,9 +424,9 @@
 }
 
 define float @ret_frexp_f32_0_nopzero_dynamic_dynamic(float nofpclass(pzero) %arg0) #3 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopzero_dynamic_dynamic
-; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nopzero_dynamic_dynamic
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR4]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -436,9 +436,9 @@
 }
 
 define float @ret_frexp_f32_0_nopzero_ieee_daz(float nofpclass(pzero) %arg0) #4 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopzero_ieee_daz
-; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR3]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(sub) float @ret_frexp_f32_0_nopzero_ieee_daz
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR5]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
@@ -448,9 +448,9 @@
 }
 
 define float @ret_frexp_f32_0_nopzero_daz_ieee(float nofpclass(pzero) %arg0) #5 {
-; CHECK-LABEL: define float @ret_frexp_f32_0_nopzero_daz_ieee
-; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR4]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]])
+; CHECK-LABEL: define nofpclass(pzero sub) float @ret_frexp_f32_0_nopzero_daz_ieee
+; CHECK-SAME: (float nofpclass(pzero) [[ARG0:%.*]]) #[[ATTR6]] {
+; CHECK-NEXT:    [[CALL:%.*]] = call { float, i32 } @llvm.frexp.f32.i32(float [[ARG0]]) #[[ATTR7]]
 ; CHECK-NEXT:    [[CALL_0:%.*]] = extractvalue { float, i32 } [[CALL]], 0
 ; CHECK-NEXT:    ret float [[CALL_0]]
 ;
Index: llvm/test/Transforms/Inline/simplify-instruction-computeKnownFPClass-context.ll
===================================================================
--- llvm/test/Transforms/Inline/simplify-instruction-computeKnownFPClass-context.ll
+++ llvm/test/Transforms/Inline/simplify-instruction-computeKnownFPClass-context.ll
@@ -187,5 +187,26 @@
 
 declare double @llvm.ldexp.f64.i32(double, i32)
 
+define i1 @simplify_fcmp_ord_frexp_caller(double nofpclass(zero inf) %i0) {
+; CHECK-LABEL: define i1 @simplify_fcmp_ord_frexp_caller
+; CHECK-SAME: (double nofpclass(inf zero) [[I0:%.*]]) {
+; CHECK-NEXT:    [[FREXP_I:%.*]] = call { double, i32 } @llvm.frexp.f64.i32(double [[I0]])
+; CHECK-NEXT:    [[FREXP_0_I:%.*]] = extractvalue { double, i32 } [[FREXP_I]], 0
+; CHECK-NEXT:    [[CMP_I:%.*]] = fcmp one double [[FREXP_0_I]], 0x7FF0000000000000
+; CHECK-NEXT:    ret i1 [[CMP_I]]
+;
+  %call = call i1 @simplify_fcmp_ord_frexp_callee(double %i0)
+  ret i1 %call
+}
+
+define internal i1 @simplify_fcmp_ord_frexp_callee(double %a) {
+  %frexp = call { double, i32 } @llvm.frexp.f64.i32(double %a)
+  %frexp.0 = extractvalue { double, i32 } %frexp, 0
+  %cmp = fcmp one double %frexp.0, 0x7FF0000000000000
+  ret i1 %cmp
+}
+
+declare { double, i32 } @llvm.frexp.f64.i32(double)
+
 attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
 attributes #1 = { nocallback nofree nosync nounwind willreturn memory(none) }