diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 90bbd102868c5..6476a38b8a545 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -2801,6 +2801,8 @@ Instruction *InstCombinerImpl::visitCallInst(CallInst &CI) {
 
   case Intrinsic::minnum:
   case Intrinsic::maxnum:
+  case Intrinsic::minimumnum:
+  case Intrinsic::maximumnum:
   case Intrinsic::minimum:
   case Intrinsic::maximum: {
     Value *Arg0 = II->getArgOperand(0);
@@ -2819,6 +2821,12 @@ Instruction *InstCombinerImpl::visitCallInst(CallInst &CI) {
       case Intrinsic::minnum:
         NewIID = Intrinsic::maxnum;
         break;
+      case Intrinsic::maximumnum:
+        NewIID = Intrinsic::minimumnum;
+        break;
+      case Intrinsic::minimumnum:
+        NewIID = Intrinsic::maximumnum;
+        break;
       case Intrinsic::maximum:
         NewIID = Intrinsic::minimum;
         break;
@@ -2850,6 +2858,12 @@ Instruction *InstCombinerImpl::visitCallInst(CallInst &CI) {
         case Intrinsic::minnum:
           Res = minnum(*C1, *C2);
           break;
+        case Intrinsic::maximumnum:
+          Res = maximumnum(*C1, *C2);
+          break;
+        case Intrinsic::minimumnum:
+          Res = minimumnum(*C1, *C2);
+          break;
         case Intrinsic::maximum:
           Res = maximum(*C1, *C2);
           break;
@@ -2899,13 +2913,15 @@ Instruction *InstCombinerImpl::visitCallInst(CallInst &CI) {
     auto IsMinMaxOrXNegX = [IID, &X](Value *Op0, Value *Op1) {
       if (match(Op0, m_FNeg(m_Value(X))) && match(Op1, m_Specific(X)))
         return Op0->hasOneUse() ||
-               (IID != Intrinsic::minimum && IID != Intrinsic::minnum);
+               (IID != Intrinsic::minimum && IID != Intrinsic::minnum &&
+                IID != Intrinsic::minimumnum);
       return false;
     };
 
     if (IsMinMaxOrXNegX(Arg0, Arg1) || IsMinMaxOrXNegX(Arg1, Arg0)) {
       Value *R = Builder.CreateUnaryIntrinsic(Intrinsic::fabs, X, II);
-      if (IID == Intrinsic::minimum || IID == Intrinsic::minnum)
+      if (IID == Intrinsic::minimum || IID == Intrinsic::minnum ||
+          IID == Intrinsic::minimumnum)
         R = Builder.CreateFNegFMF(R, II);
       return replaceInstUsesWith(*II, R);
     }
diff --git a/llvm/test/Transforms/InstCombine/maximumnum.ll b/llvm/test/Transforms/InstCombine/maximumnum.ll
new file mode 100644
index 0000000000000..0d20be9062e77
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/maximumnum.ll
@@ -0,0 +1,379 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -S -passes=instcombine < %s | FileCheck %s
+
+define float @maximumnum_f32_1_maximumnum_val_p0(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_1_maximumnum_val_p0(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.maximumnum.f32(float %x, float 0.0)
+  %z = call float @llvm.maximumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @maximumnum_f32_1_maximumnum_p0_val_fast(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_1_maximumnum_p0_val_fast(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.maximumnum.f32(float 0.0, float %x)
+  %z = call fast float @llvm.maximumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @maximumnum_f32_1_maximumnum_p0_val_fmf1(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_1_maximumnum_p0_val_fmf1(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call nnan float @llvm.maximumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call nnan float @llvm.maximumnum.f32(float 0.0, float %x)
+  %z = call nnan ninf float @llvm.maximumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @maximumnum_f32_1_maximumnum_p0_val_fmf2(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_1_maximumnum_p0_val_fmf2(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call ninf float @llvm.maximumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call nnan ninf float @llvm.maximumnum.f32(float 0.0, float %x)
+  %z = call ninf float @llvm.maximumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @maximumnum_f32_1_maximumnum_p0_val_fmf3(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_1_maximumnum_p0_val_fmf3(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call nnan ninf float @llvm.maximumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call ninf nnan float @llvm.maximumnum.f32(float 0.0, float %x)
+  %z = call ninf nnan float @llvm.maximumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @maximumnum_f32_p0_maximumnum_val_n0(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_p0_maximumnum_val_n0(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.maximumnum.f32(float %x, float -0.0)
+  %z = call float @llvm.maximumnum.f32(float %y, float 0.0)
+  ret float %z
+}
+
+define float @maximumnum_f32_1_maximumnum_p0_val(float %x) {
+; CHECK-LABEL: define float @maximumnum_f32_1_maximumnum_p0_val(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.maximumnum.f32(float 0.0, float %x)
+  %z = call float @llvm.maximumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define <2 x float> @maximumnum_f32_1_maximumnum_val_p0_val_v2f32(<2 x float> %x) {
+; CHECK-LABEL: define <2 x float> @maximumnum_f32_1_maximumnum_val_p0_val_v2f32(
+; CHECK-SAME: <2 x float> [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call <2 x float> @llvm.maximumnum.v2f32(<2 x float> [[X]], <2 x float> splat (float 1.000000e+00))
+; CHECK-NEXT:    ret <2 x float> [[Z]]
+;
+  %y = call <2 x float> @llvm.maximumnum.v2f32(<2 x float> %x, <2 x float> zeroinitializer)
+  %z = call <2 x float> @llvm.maximumnum.v2f32(<2 x float> %y, <2 x float> splat (float 1.0))
+  ret <2 x float> %z
+}
+
+define float @maximumnum4(float %x, float %y, float %z, float %w) {
+; CHECK-LABEL: define float @maximumnum4(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], float [[Z:%.*]], float [[W:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[B:%.*]] = call float @llvm.maximumnum.f32(float [[Z]], float [[W]])
+; CHECK-NEXT:    [[C:%.*]] = call float @llvm.maximumnum.f32(float [[A]], float [[B]])
+; CHECK-NEXT:    ret float [[C]]
+;
+  %a = call float @llvm.maximumnum.f32(float %x, float %y)
+  %b = call float @llvm.maximumnum.f32(float %z, float %w)
+  %c = call float @llvm.maximumnum.f32(float %a, float %b)
+  ret float %c
+}
+
+; PR37404 - https://bugs.llvm.org/show_bug.cgi?id=37404
+
+define <2 x float> @maximumnum_neg_neg(<2 x float> %x, <2 x float> %y) {
+; CHECK-LABEL: define <2 x float> @maximumnum_neg_neg(
+; CHECK-SAME: <2 x float> [[X:%.*]], <2 x float> [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> [[X]], <2 x float> [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg <2 x float> [[TMP1]]
+; CHECK-NEXT:    ret <2 x float> [[R]]
+;
+  %negx = fsub <2 x float> splat (float -0.0), %x
+  %negy = fsub <2 x float> splat (float -0.0), %y
+  %r = call <2 x float> @llvm.maximumnum.v2f32(<2 x float> %negx, <2 x float> %negy)
+  ret <2 x float> %r
+}
+
+; FMF is not required, but it should be propagated from the intrinsic (not the fnegs).
+
+define float @maximumnum_neg_neg_vec_fmf(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_neg_neg_vec_fmf(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call fast float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg fast float [[TMP1]]
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fsub arcp float -0.0, %x
+  %negy = fsub afn float -0.0, %y
+  %r = call fast float @llvm.maximumnum.f32(float %negx, float %negy)
+  ret float %r
+}
+
+define float @maximumnum_unary_neg_neg_vec_fmf(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_unary_neg_neg_vec_fmf(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call fast float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg fast float [[TMP1]]
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg arcp float %x
+  %negy = fneg afn float %y
+  %r = call fast float @llvm.maximumnum.f32(float %negx, float %negy)
+  ret float %r
+}
+
+; 1 extra use of an intermediate value should still allow the fold,
+; but 2 would require more instructions than we started with.
+
+declare void @use(float)
+define float @maximumnum_neg_neg_extra_use_x(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_neg_neg_extra_use_x(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg float [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg float [[TMP1]]
+; CHECK-NEXT:    call void @use(float [[NEGX]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fsub float -0.0, %x
+  %negy = fsub float -0.0, %y
+  %r = call float @llvm.maximumnum.f32(float %negx, float %negy)
+  call void @use(float %negx)
+  ret float %r
+}
+
+define float @maximumnum_unary_neg_neg_extra_use_x(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_unary_neg_neg_extra_use_x(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg float [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg float [[TMP1]]
+; CHECK-NEXT:    call void @use(float [[NEGX]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  %negy = fneg float %y
+  %r = call float @llvm.maximumnum.f32(float %negx, float %negy)
+  call void @use(float %negx)
+  ret float %r
+}
+
+define float @maximumnum_neg_neg_extra_use_y(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_neg_neg_extra_use_y(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg float [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg float [[TMP1]]
+; CHECK-NEXT:    call void @use(float [[NEGY]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fsub float -0.0, %x
+  %negy = fsub float -0.0, %y
+  %r = call float @llvm.maximumnum.f32(float %negx, float %negy)
+  call void @use(float %negy)
+  ret float %r
+}
+
+define float @maximumnum_unary_neg_neg_extra_use_y(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_unary_neg_neg_extra_use_y(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg float [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg float [[TMP1]]
+; CHECK-NEXT:    call void @use(float [[NEGY]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  %negy = fneg float %y
+  %r = call float @llvm.maximumnum.f32(float %negx, float %negy)
+  call void @use(float %negy)
+  ret float %r
+}
+
+define float @maximumnum_neg_neg_extra_use_x_and_y(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_neg_neg_extra_use_x_and_y(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg float [[X]]
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg float [[Y]]
+; CHECK-NEXT:    [[R:%.*]] = call float @llvm.maximumnum.f32(float [[NEGX]], float [[NEGY]])
+; CHECK-NEXT:    call void @use(float [[NEGX]])
+; CHECK-NEXT:    call void @use(float [[NEGY]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fsub float -0.0, %x
+  %negy = fsub float -0.0, %y
+  %r = call float @llvm.maximumnum.f32(float %negx, float %negy)
+  call void @use(float %negx)
+  call void @use(float %negy)
+  ret float %r
+}
+
+define float @maximumnum_unary_neg_neg_extra_use_x_and_y(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_unary_neg_neg_extra_use_x_and_y(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg float [[X]]
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg float [[Y]]
+; CHECK-NEXT:    [[R:%.*]] = call float @llvm.maximumnum.f32(float [[NEGX]], float [[NEGY]])
+; CHECK-NEXT:    call void @use(float [[NEGX]])
+; CHECK-NEXT:    call void @use(float [[NEGY]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  %negy = fneg float %y
+  %r = call float @llvm.maximumnum.f32(float %negx, float %negy)
+  call void @use(float %negx)
+  call void @use(float %negy)
+  ret float %r
+}
+
+define float @maximumnum_reduce_precision(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_reduce_precision(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  %maximumnum = call double @llvm.maximumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %maximumnum to float
+  ret float %trunc
+}
+
+define float @maximumnum_reduce_precision_fmf(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_reduce_precision_fmf(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = call nnan float @llvm.maximumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  %maximumnum = call nnan double @llvm.maximumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %maximumnum to float
+  ret float %trunc
+}
+
+define float @maximumnum_reduce_precision_multi_use_0(float %x, float %y, ptr %p) {
+; CHECK-LABEL: define float @maximumnum_reduce_precision_multi_use_0(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]]) {
+; CHECK-NEXT:    [[X_EXT:%.*]] = fpext float [[X]] to double
+; CHECK-NEXT:    store double [[X_EXT]], ptr [[P]], align 8
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  store double %x.ext, ptr %p
+  %maximumnum = call double @llvm.maximumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %maximumnum to float
+  ret float %trunc
+}
+
+define float @reduce_precision_multi_use_1(float %x, float %y, ptr %p) {
+; CHECK-LABEL: define float @reduce_precision_multi_use_1(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]]) {
+; CHECK-NEXT:    [[Y_EXT1:%.*]] = fpext float [[Y]] to double
+; CHECK-NEXT:    store double [[Y_EXT1]], ptr [[P]], align 8
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  store double %y.ext, ptr %p
+  %maximumnum = call double @llvm.maximumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %maximumnum to float
+  ret float %trunc
+}
+
+define float @maximumnum_reduce_precision_multi_use_2(float %x, float %y, ptr %p, ptr %p2) {
+; CHECK-LABEL: define float @maximumnum_reduce_precision_multi_use_2(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]], ptr [[P2:%.*]]) {
+; CHECK-NEXT:    [[X_EXT:%.*]] = fpext float [[X]] to double
+; CHECK-NEXT:    [[Y_EXT:%.*]] = fpext float [[Y]] to double
+; CHECK-NEXT:    store double [[X_EXT]], ptr [[P]], align 8
+; CHECK-NEXT:    store double [[Y_EXT]], ptr [[P2]], align 8
+; CHECK-NEXT:    [[MAXIMUMNUM:%.*]] = call double @llvm.maximumnum.f64(double [[X_EXT]], double [[Y_EXT]])
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[MAXIMUMNUM]] to float
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  store double %x.ext, ptr %p
+  store double %y.ext, ptr %p2
+  %maximumnum = call double @llvm.maximumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %maximumnum to float
+  ret float %trunc
+}
+
+define float @maximumnum_negated_op(float %x) {
+; CHECK-LABEL: define float @maximumnum_negated_op(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[R:%.*]] = call float @llvm.fabs.f32(float [[X]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  %r = call float @llvm.maximumnum.f32(float %negx, float %x)
+  ret float %r
+}
+
+define <2 x double> @maximumnum_negated_op_fmf_commute_vec(<2 x double> %x) {
+; CHECK-LABEL: define <2 x double> @maximumnum_negated_op_fmf_commute_vec(
+; CHECK-SAME: <2 x double> [[X:%.*]]) {
+; CHECK-NEXT:    [[R:%.*]] = call nnan ninf nsz <2 x double> @llvm.fabs.v2f64(<2 x double> [[X]])
+; CHECK-NEXT:    ret <2 x double> [[R]]
+;
+  %negx = fneg <2 x double> %x
+  %r = call nsz nnan ninf <2 x double> @llvm.maximumnum.v2f64(<2 x double> %x, <2 x double> %negx)
+  ret <2 x double> %r
+}
+
+define float @maximumnum_negated_op_extra_use(float %x) {
+; CHECK-LABEL: define float @maximumnum_negated_op_extra_use(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg float [[X]]
+; CHECK-NEXT:    call void @use(float [[NEGX]])
+; CHECK-NEXT:    [[R:%.*]] = call float @llvm.fabs.f32(float [[X]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  call void @use(float %negx)
+  %r = call float @llvm.maximumnum.f32(float %negx, float %x)
+  ret float %r
+}
+
+define float @maximumnum_negated_op_extra_use_comm(float %x) {
+; CHECK-LABEL: define float @maximumnum_negated_op_extra_use_comm(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg float [[X]]
+; CHECK-NEXT:    call void @use(float [[NEGX]])
+; CHECK-NEXT:    [[R:%.*]] = call float @llvm.fabs.f32(float [[X]])
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  call void @use(float %negx)
+  %r = call float @llvm.maximumnum.f32(float %x, float %negx)
+  ret float %r
+}
diff --git a/llvm/test/Transforms/InstCombine/minimumnum.ll b/llvm/test/Transforms/InstCombine/minimumnum.ll
new file mode 100644
index 0000000000000..9262a71939158
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/minimumnum.ll
@@ -0,0 +1,447 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -S -passes=instcombine < %s | FileCheck %s
+
+define float @minimumnum_f32_1_minimumnum_val_p0(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_val_p0(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.minimumnum.f32(float %x, float 0.0)
+  %z = call float @llvm.minimumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @minimumnum_f32_1_minimumnum_p0_val_fast(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fast(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.minimumnum.f32(float 0.0, float %x)
+  %z = call fast float @llvm.minimumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @minimumnum_f32_1_minimumnum_p0_val_fmf1(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fmf1(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call nnan float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call nsz nnan float @llvm.minimumnum.f32(float 0.0, float %x)
+  %z = call nnan ninf float @llvm.minimumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @minimumnum_f32_1_minimumnum_p0_val_fmf2(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fmf2(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call ninf float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call nnan ninf float @llvm.minimumnum.f32(float 0.0, float %x)
+  %z = call nsz ninf float @llvm.minimumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @minimumnum_f32_1_minimumnum_p0_val_fmf3(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val_fmf3(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call nnan ninf nsz float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call nsz ninf nnan float @llvm.minimumnum.f32(float 0.0, float %x)
+  %z = call nsz ninf nnan float @llvm.minimumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define float @minimumnum_f32_p0_minimumnum_val_n0(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_p0_minimumnum_val_n0(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float -0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.minimumnum.f32(float %x, float -0.0)
+  %z = call float @llvm.minimumnum.f32(float %y, float 0.0)
+  ret float %z
+}
+
+define float @minimumnum_f32_1_minimumnum_p0_val(float %x) {
+; CHECK-LABEL: define float @minimumnum_f32_1_minimumnum_p0_val(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 0.000000e+00)
+; CHECK-NEXT:    ret float [[Z]]
+;
+  %y = call float @llvm.minimumnum.f32(float 0.0, float %x)
+  %z = call float @llvm.minimumnum.f32(float %y, float 1.0)
+  ret float %z
+}
+
+define <2 x float> @minimumnum_f32_1_minimumnum_val_p0_val_v2f32(<2 x float> %x) {
+; CHECK-LABEL: define <2 x float> @minimumnum_f32_1_minimumnum_val_p0_val_v2f32(
+; CHECK-SAME: <2 x float> [[X:%.*]]) {
+; CHECK-NEXT:    [[Z:%.*]] = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> [[X]], <2 x float> zeroinitializer)
+; CHECK-NEXT:    ret <2 x float> [[Z]]
+;
+  %y = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> %x, <2 x float> zeroinitializer)
+  %z = call <2 x float> @llvm.minimumnum.v2f32(<2 x float> %y, <2 x float> splat (float 1.0))
+  ret <2 x float> %z
+}
+
+define float @minimumnum4(float %x, float %y, float %z, float %w) {
+; CHECK-LABEL: define float @minimumnum4(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], float [[Z:%.*]], float [[W:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[B:%.*]] = call float @llvm.minimumnum.f32(float [[Z]], float [[W]])
+; CHECK-NEXT:    [[C:%.*]] = call float @llvm.minimumnum.f32(float [[A]], float [[B]])
+; CHECK-NEXT:    ret float [[C]]
+;
+  %a = call float @llvm.minimumnum.f32(float %x, float %y)
+  %b = call float @llvm.minimumnum.f32(float %z, float %w)
+  %c = call float @llvm.minimumnum.f32(float %a, float %b)
+  ret float %c
+}
+
+define float @minimumnum_x_maximumnum_x_y(float %x, float %y) {
+; CHECK-LABEL: define float @minimumnum_x_maximumnum_x_y(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[B:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[A]])
+; CHECK-NEXT:    ret float [[B]]
+;
+  %a = call float @llvm.maximumnum.f32(float %x, float %y)
+  %b = call float @llvm.minimumnum.f32(float %x, float %a)
+  ret float %b
+}
+
+define float @maximumnum_x_minimumnum_x_y(float %x, float %y) {
+; CHECK-LABEL: define float @maximumnum_x_minimumnum_x_y(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    [[B:%.*]] = call float @llvm.maximumnum.f32(float [[X]], float [[A]])
+; CHECK-NEXT:    ret float [[B]]
+;
+  %a = call float @llvm.minimumnum.f32(float %x, float %y)
+  %b = call float @llvm.maximumnum.f32(float %x, float %a)
+  ret float %b
+}
+
+; PR37405 - https://bugs.llvm.org/show_bug.cgi?id=37405
+
+define double @minimumnum_neg_neg(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_neg_neg(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg double [[TMP1]]
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fsub double -0.0, %x
+  %negy = fsub double -0.0, %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  ret double %r
+}
+
+define double @minimumnum_unary_neg_neg(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_unary_neg_neg(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg double [[TMP1]]
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fneg double %x
+  %negy = fneg double %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  ret double %r
+}
+
+; FMF is not required, but it should be propagated from the intrinsic (not the fnegs).
+; Also, make sure this works with vectors.
+
+define <2 x double> @minimumnum_neg_neg_vec_fmf(<2 x double> %x, <2 x double> %y) {
+; CHECK-LABEL: define <2 x double> @minimumnum_neg_neg_vec_fmf(
+; CHECK-SAME: <2 x double> [[X:%.*]], <2 x double> [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call nnan ninf <2 x double> @llvm.maximumnum.v2f64(<2 x double> [[X]], <2 x double> [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg nnan ninf <2 x double> [[TMP1]]
+; CHECK-NEXT:    ret <2 x double> [[R]]
+;
+  %negx = fsub reassoc <2 x double> splat (double -0.0), %x
+  %negy = fsub fast <2 x double> splat (double -0.0), %y
+  %r = call nnan ninf <2 x double> @llvm.minimumnum.v2f64(<2 x double> %negx, <2 x double> %negy)
+  ret <2 x double> %r
+}
+
+define <2 x double> @minimumnum_unary_neg_neg_vec_fmf(<2 x double> %x, <2 x double> %y) {
+; CHECK-LABEL: define <2 x double> @minimumnum_unary_neg_neg_vec_fmf(
+; CHECK-SAME: <2 x double> [[X:%.*]], <2 x double> [[Y:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call nnan ninf <2 x double> @llvm.maximumnum.v2f64(<2 x double> [[X]], <2 x double> [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg nnan ninf <2 x double> [[TMP1]]
+; CHECK-NEXT:    ret <2 x double> [[R]]
+;
+  %negx = fneg reassoc <2 x double> %x
+  %negy = fneg fast <2 x double> %y
+  %r = call nnan ninf <2 x double> @llvm.minimumnum.v2f64(<2 x double> %negx, <2 x double> %negy)
+  ret <2 x double> %r
+}
+
+; 1 extra use of an intermediate value should still allow the fold,
+; but 2 would require more instructions than we started with.
+
+declare void @use(double)
+define double @minimumnum_neg_neg_extra_use_x(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_neg_neg_extra_use_x(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg double [[TMP1]]
+; CHECK-NEXT:    call void @use(double [[NEGX]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fsub double -0.0, %x
+  %negy = fsub double -0.0, %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  call void @use(double %negx)
+  ret double %r
+}
+
+define double @minimumnum_unary_neg_neg_extra_use_x(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_unary_neg_neg_extra_use_x(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg double [[TMP1]]
+; CHECK-NEXT:    call void @use(double [[NEGX]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fneg double %x
+  %negy = fneg double %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  call void @use(double %negx)
+  ret double %r
+}
+
+define double @minimumnum_neg_neg_extra_use_y(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_neg_neg_extra_use_y(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg double [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg double [[TMP1]]
+; CHECK-NEXT:    call void @use(double [[NEGY]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fsub double -0.0, %x
+  %negy = fsub double -0.0, %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  call void @use(double %negy)
+  ret double %r
+}
+
+define double @minimumnum_unary_neg_neg_extra_use_y(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_unary_neg_neg_extra_use_y(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg double [[Y]]
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.maximumnum.f64(double [[X]], double [[Y]])
+; CHECK-NEXT:    [[R:%.*]] = fneg double [[TMP1]]
+; CHECK-NEXT:    call void @use(double [[NEGY]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fneg double %x
+  %negy = fneg double %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  call void @use(double %negy)
+  ret double %r
+}
+
+define double @minimumnum_neg_neg_extra_use_x_and_y(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_neg_neg_extra_use_x_and_y(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg double [[Y]]
+; CHECK-NEXT:    [[R:%.*]] = call double @llvm.minimumnum.f64(double [[NEGX]], double [[NEGY]])
+; CHECK-NEXT:    call void @use(double [[NEGX]])
+; CHECK-NEXT:    call void @use(double [[NEGY]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fsub double -0.0, %x
+  %negy = fsub double -0.0, %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  call void @use(double %negx)
+  call void @use(double %negy)
+  ret double %r
+}
+
+define double @minimumnum_unary_neg_neg_extra_use_x_and_y(double %x, double %y) {
+; CHECK-LABEL: define double @minimumnum_unary_neg_neg_extra_use_x_and_y(
+; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT:    [[NEGY:%.*]] = fneg double [[Y]]
+; CHECK-NEXT:    [[R:%.*]] = call double @llvm.minimumnum.f64(double [[NEGX]], double [[NEGY]])
+; CHECK-NEXT:    call void @use(double [[NEGX]])
+; CHECK-NEXT:    call void @use(double [[NEGY]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fneg double %x
+  %negy = fneg double %y
+  %r = call double @llvm.minimumnum.f64(double %negx, double %negy)
+  call void @use(double %negx)
+  call void @use(double %negy)
+  ret double %r
+}
+
+define float @minimumnum_reduce_precision(float %x, float %y) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_fmf(float %x, float %y) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_fmf(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = call nnan float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  %minimumnum = call nnan double @llvm.minimumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_multi_use_0(float %x, float %y, ptr %p) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_multi_use_0(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]]) {
+; CHECK-NEXT:    [[X_EXT:%.*]] = fpext float [[X]] to double
+; CHECK-NEXT:    store double [[X_EXT]], ptr [[P]], align 8
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  store double %x.ext, ptr %p
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_multi_use_1(float %x, float %y, ptr %p) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_multi_use_1(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]]) {
+; CHECK-NEXT:    [[Y_EXT:%.*]] = fpext float [[Y]] to double
+; CHECK-NEXT:    store double [[Y_EXT]], ptr [[P]], align 8
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float [[Y]])
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  store double %y.ext, ptr %p
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_multi_use_2(float %x, float %y, ptr %p, ptr %p2) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_multi_use_2(
+; CHECK-SAME: float [[X:%.*]], float [[Y:%.*]], ptr [[P:%.*]], ptr [[P2:%.*]]) {
+; CHECK-NEXT:    [[X_EXT:%.*]] = fpext float [[X]] to double
+; CHECK-NEXT:    [[Y_EXT:%.*]] = fpext float [[Y]] to double
+; CHECK-NEXT:    store double [[X_EXT]], ptr [[P]], align 8
+; CHECK-NEXT:    store double [[Y_EXT]], ptr [[P2]], align 8
+; CHECK-NEXT:    [[MINIMUMNUM:%.*]] = call double @llvm.minimumnum.f64(double [[X_EXT]], double [[Y_EXT]])
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[MINIMUMNUM]] to float
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %y.ext = fpext float %y to double
+  store double %x.ext, ptr %p
+  store double %y.ext, ptr %p2
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double %y.ext)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_const(float %x) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_const(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = call float @llvm.minimumnum.f32(float [[X]], float 1.000000e+00)
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double 1.0)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_const_not_lossless(float %x) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_const_not_lossless(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[X_EXT:%.*]] = fpext float [[X]] to double
+; CHECK-NEXT:    [[MINIMUMNUM:%.*]] = call double @llvm.minimumnum.f64(double [[X_EXT]], double 1.000000e-01)
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[MINIMUMNUM]] to float
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double 0.1)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_reduce_precision_const_multi_use(float %x) {
+; CHECK-LABEL: define float @minimumnum_reduce_precision_const_multi_use(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[X_EXT:%.*]] = fpext float [[X]] to double
+; CHECK-NEXT:    call void @use(double [[X_EXT]])
+; CHECK-NEXT:    [[MINIMUMNUM:%.*]] = call double @llvm.minimumnum.f64(double [[X_EXT]], double 1.000000e+00)
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[MINIMUMNUM]] to float
+; CHECK-NEXT:    ret float [[TRUNC]]
+;
+  %x.ext = fpext float %x to double
+  call void @use(double %x.ext)
+  %minimumnum = call double @llvm.minimumnum.f64(double %x.ext, double 1.0)
+  %trunc = fptrunc double %minimumnum to float
+  ret float %trunc
+}
+
+define float @minimumnum_negated_op(float %x) {
+; CHECK-LABEL: define float @minimumnum_negated_op(
+; CHECK-SAME: float [[X:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call float @llvm.fabs.f32(float [[X]])
+; CHECK-NEXT:    [[R:%.*]] = fneg float [[TMP1]]
+; CHECK-NEXT:    ret float [[R]]
+;
+  %negx = fneg float %x
+  %r = call float @llvm.minimumnum.f32(float %x, float %negx)
+  ret float %r
+}
+
+define <2 x double> @minimumnum_negated_op_fmf_commute_vec(<2 x double> %x) {
+; CHECK-LABEL: define <2 x double> @minimumnum_negated_op_fmf_commute_vec(
+; CHECK-SAME: <2 x double> [[X:%.*]]) {
+; CHECK-NEXT:    [[TMP1:%.*]] = call nnan ninf nsz <2 x double> @llvm.fabs.v2f64(<2 x double> [[X]])
+; CHECK-NEXT:    [[R:%.*]] = fneg nnan ninf nsz <2 x double> [[TMP1]]
+; CHECK-NEXT:    ret <2 x double> [[R]]
+;
+  %negx = fneg <2 x double> %x
+  %r = call nsz nnan ninf <2 x double> @llvm.minimumnum.v2f64(<2 x double> %negx, <2 x double> %x)
+  ret <2 x double> %r
+}
+
+define double @minimumnum_negated_op_extra_use(double %x) {
+; CHECK-LABEL: define double @minimumnum_negated_op_extra_use(
+; CHECK-SAME: double [[X:%.*]]) {
+; CHECK-NEXT:    [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT:    call void @use(double [[NEGX]])
+; CHECK-NEXT:    [[R:%.*]] = call double @llvm.minimumnum.f64(double [[NEGX]], double [[X]])
+; CHECK-NEXT:    ret double [[R]]
+;
+  %negx = fneg double %x
+  call void @use(double %negx)
+  %r = call double @llvm.minimumnum.f64(double %negx, double %x)
+  ret double %r
+}