Index: llvm/lib/Analysis/ValueTracking.cpp
===================================================================
--- llvm/lib/Analysis/ValueTracking.cpp
+++ llvm/lib/Analysis/ValueTracking.cpp
@@ -4651,7 +4651,8 @@
       break;
     }
     case Intrinsic::exp:
-    case Intrinsic::exp2: {
+    case Intrinsic::exp2:
+    case Intrinsic::exp10: {
       Known.knownNot(fcNegative);
       if ((InterestedClasses & fcNan) == fcNone)
         break;
Index: llvm/test/Transforms/Attributor/nofpclass-exp.ll
===================================================================
--- llvm/test/Transforms/Attributor/nofpclass-exp.ll
+++ llvm/test/Transforms/Attributor/nofpclass-exp.ll
@@ -236,9 +236,9 @@
 }
 
 define float @ret_exp10(float %arg0) {
-; CHECK-LABEL: define float @ret_exp10
+; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_exp10
 ; CHECK-SAME: (float [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -246,9 +246,9 @@
 }
 
 define float @ret_exp10_noinf(float nofpclass(inf) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_noinf
+; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_exp10_noinf
 ; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -256,9 +256,9 @@
 }
 
 define float @ret_exp10_nopinf(float nofpclass(pinf) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_nopinf
+; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_exp10_nopinf
 ; CHECK-SAME: (float nofpclass(pinf) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -266,9 +266,9 @@
 }
 
 define float @ret_exp10_noninf(float nofpclass(ninf) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_noninf
+; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_exp10_noninf
 ; CHECK-SAME: (float nofpclass(ninf) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -276,9 +276,9 @@
 }
 
 define float @ret_exp10_nonan(float nofpclass(nan) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_nonan
+; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) float @ret_exp10_nonan
 ; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(nan ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -286,9 +286,9 @@
 }
 
 define float @ret_exp10_nonan_noinf(float nofpclass(nan inf) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_nonan_noinf
+; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) float @ret_exp10_nonan_noinf
 ; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(nan ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -296,9 +296,9 @@
 }
 
 define float @ret_exp10_nonan_noinf_nozero(float nofpclass(nan inf zero) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_nonan_noinf_nozero
+; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) float @ret_exp10_nonan_noinf_nozero
 ; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(nan ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -306,9 +306,9 @@
 }
 
 define float @ret_exp10_noinf_nozero(float nofpclass(inf zero) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_noinf_nozero
+; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_exp10_noinf_nozero
 ; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -316,9 +316,9 @@
 }
 
 define float @ret_exp10_noinf_nonegzero(float nofpclass(inf nzero) %arg0) {
-; CHECK-LABEL: define float @ret_exp10_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(ninf nzero nsub nnorm) float @ret_exp10_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR1]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[ARG0]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.exp10.f32(float %arg0)
@@ -326,10 +326,10 @@
 }
 
 define float @ret_exp10_positive_source(i32 %arg) {
-; CHECK-LABEL: define float @ret_exp10_positive_source
+; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) float @ret_exp10_positive_source
 ; CHECK-SAME: (i32 [[ARG:%.*]]) #[[ATTR1]] {
 ; CHECK-NEXT:    [[UITOFP:%.*]] = uitofp i32 [[ARG]] to float
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[UITOFP]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(nan ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[UITOFP]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %uitofp = uitofp i32 %arg to float
@@ -339,10 +339,10 @@
 
 ; Could produce a nan because we don't know if the multiply is negative.
 define float @ret_exp10_unknown_sign(float nofpclass(nan) %arg0, float nofpclass(nan) %arg1) {
-; CHECK-LABEL: define float @ret_exp10_unknown_sign
+; CHECK-LABEL: define nofpclass(nan ninf nzero nsub nnorm) float @ret_exp10_unknown_sign
 ; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]], float nofpclass(nan) [[ARG1:%.*]]) #[[ATTR1]] {
 ; CHECK-NEXT:    [[UNKNOWN_SIGN_NOT_NAN:%.*]] = fmul nnan float [[ARG0]], [[ARG1]]
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.exp10.f32(float [[UNKNOWN_SIGN_NOT_NAN]]) #[[ATTR2]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(nan ninf nzero nsub nnorm) float @llvm.exp10.f32(float [[UNKNOWN_SIGN_NOT_NAN]]) #[[ATTR2]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %unknown.sign.not.nan = fmul nnan float %arg0, %arg1