Index: llvm/include/llvm/Analysis/ValueTracking.h
===================================================================
--- llvm/include/llvm/Analysis/ValueTracking.h
+++ llvm/include/llvm/Analysis/ValueTracking.h
@@ -293,6 +293,9 @@
   /// floating-point mode for the function interprets denormals as zero.
   bool isKnownNeverLogicalZero(const Function &F, Type *Ty) const;
 
+  /// Return true if it's know this can never be interpreted as a negative zero.
+  bool isKnownNeverLogicalNegZero(const Function &F, Type *Ty) const;
+
   static constexpr FPClassTest OrderedLessThanZeroMask =
       fcNegSubnormal | fcNegNormal | fcNegInf;
   static constexpr FPClassTest OrderedGreaterThanZeroMask =
Index: llvm/lib/Analysis/ValueTracking.cpp
===================================================================
--- llvm/lib/Analysis/ValueTracking.cpp
+++ llvm/lib/Analysis/ValueTracking.cpp
@@ -4296,11 +4296,24 @@
   return F.getDenormalMode(Ty->getFltSemantics()).Input == DenormalMode::IEEE;
 }
 
+static bool inputDenormalIsIEEEOrPosZero(const Function &F, const Type *Ty) {
+  Ty = Ty->getScalarType();
+  DenormalMode Mode = F.getDenormalMode(Ty->getFltSemantics());
+  return Mode.Input == DenormalMode::IEEE ||
+         Mode.Input == DenormalMode::PositiveZero;
+}
+
 bool KnownFPClass::isKnownNeverLogicalZero(const Function &F, Type *Ty) const {
   return isKnownNeverZero() &&
          (isKnownNeverSubnormal() || inputDenormalIsIEEE(F, Ty));
 }
 
+bool KnownFPClass::isKnownNeverLogicalNegZero(const Function &F,
+                                              Type *Ty) const {
+  return isKnownNeverNegZero() &&
+         (isKnownNeverNegSubnormal() || inputDenormalIsIEEEOrPosZero(F, Ty));
+}
+
 /// Returns a pair of values, which if passed to llvm.is.fpclass, returns the
 /// same result as an fcmp with the given operands.
 std::pair<Value *, FPClassTest> llvm::fcmpToClassTest(FCmpInst::Predicate Pred,
@@ -4714,6 +4727,35 @@
           Known.knownNot(fcNegative);
         break;
       }
+      case Intrinsic::sqrt: {
+        KnownFPClass KnownSrc;
+        computeKnownFPClass(II->getArgOperand(0), DemandedElts,
+                            InterestedClasses, KnownSrc, Depth + 1, Q, TLI);
+
+        if (KnownSrc.isKnownNeverPosInfinity())
+          Known.knownNot(fcPosInf);
+        if (KnownSrc.isKnownNever(fcSNan))
+          Known.knownNot(fcSNan);
+
+        // Any negative value besides -0 returns a nan.
+        if (KnownSrc.isKnownNeverNaN() &&
+            KnownSrc.cannotBeOrderedLessThanZero())
+          Known.knownNot(fcNan);
+
+        // The only negative value that can be returned is -0 for -0 inputs.
+        Known.knownNot(fcNegInf | fcNegSubnormal | fcNegNormal);
+
+        // If the input denormal mode could be PreserveSign, a negative
+        // subnormal input could produce a negative zero output.
+        if (KnownSrc.isKnownNeverLogicalNegZero(*II->getFunction(),
+                                                II->getType())) {
+          Known.knownNot(fcNegZero);
+          if (KnownSrc.isKnownNeverNaN())
+            Known.SignBit = false;
+        }
+
+        break;
+      }
       case Intrinsic::sin:
       case Intrinsic::cos: {
         // Return NaN on infinite inputs.
Index: llvm/test/Transforms/Attributor/nofpclass-sqrt.ll
===================================================================
--- llvm/test/Transforms/Attributor/nofpclass-sqrt.ll
+++ llvm/test/Transforms/Attributor/nofpclass-sqrt.ll
@@ -6,9 +6,9 @@
 declare float @llvm.experimental.constrained.sqrt.f32(float, metadata, metadata)
 
 define float @ret_sqrt(float %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt
+; CHECK-LABEL: define nofpclass(ninf nsub nnorm) float @ret_sqrt
 ; CHECK-SAME: (float [[ARG0:%.*]]) #[[ATTR2:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10:[0-9]+]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10:[0-9]+]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -16,9 +16,9 @@
 }
 
 define float @ret_sqrt_noinf(float nofpclass(inf) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_noinf
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) float @ret_sqrt_noinf
 ; CHECK-SAME: (float nofpclass(inf) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -26,9 +26,9 @@
 }
 
 define float @ret_sqrt_nopinf(float nofpclass(pinf) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_nopinf
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) float @ret_sqrt_nopinf
 ; CHECK-SAME: (float nofpclass(pinf) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -36,9 +36,9 @@
 }
 
 define float @ret_sqrt_noninf(float nofpclass(ninf) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_noninf
+; CHECK-LABEL: define nofpclass(ninf nsub nnorm) float @ret_sqrt_noninf
 ; CHECK-SAME: (float nofpclass(ninf) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(ninf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -46,9 +46,9 @@
 }
 
 define float @ret_sqrt_nonan(float nofpclass(nan) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_nonan
+; CHECK-LABEL: define nofpclass(snan ninf nsub nnorm) float @ret_sqrt_nonan
 ; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(snan ninf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -56,9 +56,9 @@
 }
 
 define float @ret_sqrt_nonan_noinf(float nofpclass(nan inf) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_nonan_noinf
+; CHECK-LABEL: define nofpclass(snan inf nsub nnorm) float @ret_sqrt_nonan_noinf
 ; CHECK-SAME: (float nofpclass(nan inf) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(snan inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -66,9 +66,9 @@
 }
 
 define float @ret_sqrt_nonan_noinf_nozero(float nofpclass(nan inf zero) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_nonan_noinf_nozero
+; CHECK-LABEL: define nofpclass(snan inf nzero nsub nnorm) float @ret_sqrt_nonan_noinf_nozero
 ; CHECK-SAME: (float nofpclass(nan inf zero) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(snan inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -76,9 +76,9 @@
 }
 
 define float @ret_sqrt_noinf_nozero(float nofpclass(inf zero) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_noinf_nozero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_noinf_nozero
 ; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -86,9 +86,9 @@
 }
 
 define float @ret_sqrt_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #0 {
-; CHECK-LABEL: define float @ret_sqrt_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR2]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -96,10 +96,10 @@
 }
 
 define float @ret_sqrt_positive_source(i32 %arg) #0 {
-; CHECK-LABEL: define float @ret_sqrt_positive_source
+; CHECK-LABEL: define nofpclass(nan inf nzero nsub nnorm) float @ret_sqrt_positive_source
 ; CHECK-SAME: (i32 [[ARG:%.*]]) #[[ATTR2]] {
 ; CHECK-NEXT:    [[UITOFP:%.*]] = uitofp i32 [[ARG]] to float
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[UITOFP]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(nan inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[UITOFP]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %uitofp = uitofp i32 %arg to float
@@ -109,10 +109,10 @@
 
 ; Could produce a nan because we don't know if the multiply is negative.
 define float @ret_sqrt_unknown_sign(float nofpclass(nan) %arg0, float nofpclass(nan) %arg1) #0 {
-; CHECK-LABEL: define float @ret_sqrt_unknown_sign
+; CHECK-LABEL: define nofpclass(snan ninf nsub nnorm) float @ret_sqrt_unknown_sign
 ; CHECK-SAME: (float nofpclass(nan) [[ARG0:%.*]], float nofpclass(nan) [[ARG1:%.*]]) #[[ATTR2]] {
 ; CHECK-NEXT:    [[UNKNOWN_SIGN_NOT_NAN:%.*]] = fmul nnan float [[ARG0]], [[ARG1]]
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[UNKNOWN_SIGN_NOT_NAN]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(snan ninf nsub nnorm) float @llvm.sqrt.f32(float [[UNKNOWN_SIGN_NOT_NAN]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %unknown.sign.not.nan = fmul nnan float %arg0, %arg1
@@ -121,9 +121,9 @@
 }
 
 define float @ret_sqrt_daz_noinf_nozero(float nofpclass(inf zero) %arg0) #1 {
-; CHECK-LABEL: define float @ret_sqrt_daz_noinf_nozero
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) float @ret_sqrt_daz_noinf_nozero
 ; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR3:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -131,9 +131,9 @@
 }
 
 define <2 x float> @ret_sqrt_daz_noinf_nozero_v2f32(<2 x float> nofpclass(inf zero) %arg0) #1 {
-; CHECK-LABEL: define <2 x float> @ret_sqrt_daz_noinf_nozero_v2f32
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) <2 x float> @ret_sqrt_daz_noinf_nozero_v2f32
 ; CHECK-SAME: (<2 x float> nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR3]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call <2 x float> @llvm.sqrt.v2f32(<2 x float> [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) <2 x float> @llvm.sqrt.v2f32(<2 x float> [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret <2 x float> [[CALL]]
 ;
   %call = call <2 x float> @llvm.sqrt.v2f32(<2 x float> %arg0)
@@ -141,9 +141,9 @@
 }
 
 define float @ret_sqrt_daz_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #1 {
-; CHECK-LABEL: define float @ret_sqrt_daz_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) float @ret_sqrt_daz_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR3]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -151,9 +151,9 @@
 }
 
 define float @ret_sqrt_dapz_noinf_nozero(float nofpclass(inf zero) %arg0) #2 {
-; CHECK-LABEL: define float @ret_sqrt_dapz_noinf_nozero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_dapz_noinf_nozero
 ; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR4:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -161,9 +161,9 @@
 }
 
 define float @ret_sqrt_dapz_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #2 {
-; CHECK-LABEL: define float @ret_sqrt_dapz_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_dapz_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR4]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -171,9 +171,9 @@
 }
 
 define float @ret_sqrt_dynamic_noinf_nozero(float nofpclass(inf zero) %arg0) #3 {
-; CHECK-LABEL: define float @ret_sqrt_dynamic_noinf_nozero
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) float @ret_sqrt_dynamic_noinf_nozero
 ; CHECK-SAME: (float nofpclass(inf zero) [[ARG0:%.*]]) #[[ATTR5:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -181,9 +181,9 @@
 }
 
 define float @ret_sqrt_dynamic_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #3 {
-; CHECK-LABEL: define float @ret_sqrt_dynamic_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nsub nnorm) float @ret_sqrt_dynamic_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR5]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -191,9 +191,9 @@
 }
 
 define float @ret_sqrt_ftz_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #4 {
-; CHECK-LABEL: define float @ret_sqrt_ftz_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_ftz_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR6:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -201,9 +201,9 @@
 }
 
 define float @ret_sqrt_ftpz_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #5 {
-; CHECK-LABEL: define float @ret_sqrt_ftpz_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_ftpz_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR7:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
@@ -211,9 +211,9 @@
 }
 
 define float @ret_sqrt_ftz_dynamic_noinf_nonegzero(float nofpclass(inf nzero) %arg0) #6 {
-; CHECK-LABEL: define float @ret_sqrt_ftz_dynamic_noinf_nonegzero
+; CHECK-LABEL: define nofpclass(inf nzero nsub nnorm) float @ret_sqrt_ftz_dynamic_noinf_nonegzero
 ; CHECK-SAME: (float nofpclass(inf nzero) [[ARG0:%.*]]) #[[ATTR8:[0-9]+]] {
-; CHECK-NEXT:    [[CALL:%.*]] = call float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
+; CHECK-NEXT:    [[CALL:%.*]] = call nofpclass(inf nzero nsub nnorm) float @llvm.sqrt.f32(float [[ARG0]]) #[[ATTR10]]
 ; CHECK-NEXT:    ret float [[CALL]]
 ;
   %call = call float @llvm.sqrt.f32(float %arg0)
Index: llvm/unittests/Analysis/ValueTrackingTest.cpp
===================================================================
--- llvm/unittests/Analysis/ValueTrackingTest.cpp
+++ llvm/unittests/Analysis/ValueTrackingTest.cpp
@@ -1512,10 +1512,10 @@
 
 TEST_F(ComputeKnownFPClassTest, CopySignNInfSrc0_NegSign) {
   parseAssembly(
-      "declare float @llvm.sqrt.f32(float)\n"
+      "declare float @llvm.log.f32(float)\n"
       "declare float @llvm.copysign.f32(float, float)\n"
       "define float @test(float %arg0, float %arg1) {\n"
-      "  %ninf = call ninf float @llvm.sqrt.f32(float %arg0)"
+      "  %ninf = call ninf float @llvm.log.f32(float %arg0)"
       "  %A = call float @llvm.copysign.f32(float %ninf, float -1.0)"
       "  ret float %A\n"
       "}\n");