diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -3397,9 +3397,6 @@
 /// NOTE: Do not check 'nsz' here because that fast-math-flag does not guarantee
 ///       that a value is not -0.0. It only guarantees that -0.0 may be treated
 ///       the same as +0.0 in floating-point ops.
-///
-/// NOTE: this function will need to be revisited when we support non-default
-/// rounding modes!
 bool llvm::CannotBeNegativeZero(const Value *V, const TargetLibraryInfo *TLI,
                                 unsigned Depth) {
   if (auto *CFP = dyn_cast<ConstantFP>(V))
@@ -3429,9 +3426,21 @@
     case Intrinsic::sqrt:
     case Intrinsic::canonicalize:
       return CannotBeNegativeZero(Call->getArgOperand(0), TLI, Depth + 1);
+    case Intrinsic::experimental_constrained_sqrt: {
+      // NOTE: This rounding mode restriction may be too strict.
+      const auto *CI = cast<ConstrainedFPIntrinsic>(Call);
+      if (CI->getRoundingMode() == RoundingMode::NearestTiesToEven)
+        return CannotBeNegativeZero(Call->getArgOperand(0), TLI, Depth + 1);
+      else
+        return false;
+    }
     // fabs(x) != -0.0
     case Intrinsic::fabs:
       return true;
+    // sitofp and uitofp turn into +0.0 for zero.
+    case Intrinsic::experimental_constrained_sitofp:
+    case Intrinsic::experimental_constrained_uitofp:
+      return true;
     }
   }
 
diff --git a/llvm/test/Transforms/InstSimplify/strictfp-fsub.ll b/llvm/test/Transforms/InstSimplify/strictfp-fsub.ll
--- a/llvm/test/Transforms/InstSimplify/strictfp-fsub.ll
+++ b/llvm/test/Transforms/InstSimplify/strictfp-fsub.ll
@@ -216,12 +216,10 @@
   ret float %sub
 }
 
-; TODO: This can't fire currently due to missing constrained support:
 define float @fold_fsub_sitofp_x_n0_defaultenv(i32 %a) #0 {
 ; CHECK-LABEL: @fold_fsub_sitofp_x_n0_defaultenv(
 ; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
-; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[FPA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
-; CHECK-NEXT:    ret float [[SUB]]
+; CHECK-NEXT:    ret float [[FPA]]
 ;
   %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
   %sub = call float @llvm.experimental.constrained.fsub.f32(float %fpa, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
diff --git a/llvm/test/Transforms/InstSimplify/strictfp-sqrt-nonneg.ll b/llvm/test/Transforms/InstSimplify/strictfp-sqrt-nonneg.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/InstSimplify/strictfp-sqrt-nonneg.ll
@@ -0,0 +1,222 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
+
+;
+; Check constrained detection of cases where negative zero is impossible:
+;
+
+define float @nonneg_u_defaultenv(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_defaultenv(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0:[0-9]+]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SQRA]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_s_defaultenv(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_defaultenv(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SQRA]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_u_maytrap(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_maytrap(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SQRA]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
+  %sub = call nnan float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
+  ret float %sub
+}
+
+define float @nonneg_s_maytrap(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_maytrap(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SQRA]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
+  %sub = call nnan float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0
+  ret float %sub
+}
+
+; NOTE: The fsub instruction is expected to remain, but the result isn't used.
+define float @nonneg_u_ebstrict(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_ebstrict(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SQRA]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  %sub = call nnan float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %sub
+}
+
+; NOTE: The fsub instruction is expected to remain, but the result isn't used.
+define float @nonneg_s_ebstrict(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_ebstrict(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call nnan float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SQRA]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  %sub = call nnan float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
+  ret float %sub
+}
+
+; Test all the rounding modes. Exception handling shouldn't matter.
+
+define float @nonneg_u_downward(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_downward(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.downward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.downward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.downward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.downward", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.downward", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.downward", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_s_downward(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_downward(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.downward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.downward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.downward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.downward", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.downward", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.downward", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_u_upward(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_upward(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.upward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.upward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.upward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.upward", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.upward", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.upward", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_s_upward(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_upward(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.upward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.upward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.upward", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.upward", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.upward", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.upward", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_u_towardzero(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_towardzero(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_s_towardzero(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_towardzero(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_u_tonearestaway(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_tonearestaway(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_s_tonearestaway(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_tonearestaway(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.tonearestaway", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_u_dynamic(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_u_dynamic(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 [[A:%.*]], metadata !"round.dynamic", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.dynamic", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.dynamic", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.uitofp.f32.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+define float @nonneg_s_dynamic(i32 %a) #0 {
+; CHECK-LABEL: @nonneg_s_dynamic(
+; CHECK-NEXT:    [[FPA:%.*]] = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 [[A:%.*]], metadata !"round.dynamic", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SQRA:%.*]] = call float @llvm.experimental.constrained.sqrt.f32(float [[FPA]], metadata !"round.dynamic", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    [[SUB:%.*]] = call float @llvm.experimental.constrained.fsub.f32(float [[SQRA]], float -0.000000e+00, metadata !"round.dynamic", metadata !"fpexcept.ignore") #[[ATTR0]]
+; CHECK-NEXT:    ret float [[SUB]]
+;
+  %fpa = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %a, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
+  %sqra = call float @llvm.experimental.constrained.sqrt.f32(float %fpa, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
+  %sub = call float @llvm.experimental.constrained.fsub.f32(float %sqra, float -0.0, metadata !"round.dynamic", metadata !"fpexcept.ignore") #0
+  ret float %sub
+}
+
+declare float @llvm.experimental.constrained.sqrt.f32(float, metadata, metadata) #0
+declare float @llvm.experimental.constrained.fsub.f32(float, float, metadata, metadata) #0
+
+declare float @llvm.experimental.constrained.sitofp.f32.i32(i32, metadata, metadata) #0
+declare float @llvm.experimental.constrained.uitofp.f32.i32(i32, metadata, metadata) #0
+
+attributes #0 = { strictfp }