diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 76020d2b1dbf4..abd8b5289aba6 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "InstCombineInternal.h"
+#include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/Statistic.h"
@@ -21,8 +22,10 @@
 #include "llvm/Analysis/Utils/Local.h"
 #include "llvm/Analysis/VectorUtils.h"
 #include "llvm/IR/ConstantRange.h"
+#include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/InstrTypes.h"
+#include "llvm/IR/Instructions.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/PatternMatch.h"
 #include "llvm/Support/KnownBits.h"
@@ -8031,6 +8034,98 @@ static Instruction *foldFCmpReciprocalAndZero(FCmpInst &I, Instruction *LHSI,
   return new FCmpInst(Pred, LHSI->getOperand(1), RHSC, "", &I);
 }
 
+// Transform 'fptrunc(x) cmp C' to 'x cmp ext(C)' if possible.
+// Patterns include:
+//    fptrunc(x) <  C  -->  x <  ext(C)
+//    fptrunc(x) <= C  -->  x <= ext(C)
+//    fptrunc(x) >  C  -->  x >  ext(C)
+//    fptrunc(x) >= C  -->  x >= ext(C)
+// where 'ext(C)' is the extension of 'C' to the type of 'x' with a small bias
+// due to precision loss.
+static Instruction *foldFCmpFpTrunc(FCmpInst &I, const Instruction &FPTrunc,
+                                    const Constant &C) {
+  FCmpInst::Predicate Pred = I.getPredicate();
+  bool RoundDown = false;
+
+  if (Pred == FCmpInst::FCMP_OGE || Pred == FCmpInst::FCMP_UGE ||
+      Pred == FCmpInst::FCMP_OLT || Pred == FCmpInst::FCMP_ULT)
+    RoundDown = true;
+  else if (Pred == FCmpInst::FCMP_OGT || Pred == FCmpInst::FCMP_UGT ||
+           Pred == FCmpInst::FCMP_OLE || Pred == FCmpInst::FCMP_ULE)
+    RoundDown = false;
+  else
+    return nullptr;
+
+  const APFloat *CValue;
+  if (!match(&C, m_APFloat(CValue)))
+    return nullptr;
+
+  if (CValue->isNaN() || CValue->isInfinity())
+    return nullptr;
+
+  auto ConvertFltSema = [](const APFloat &Src, const fltSemantics &Sema) {
+    bool LosesInfo;
+    APFloat Dest = Src;
+    Dest.convert(Sema, APFloat::rmNearestTiesToEven, &LosesInfo);
+    return Dest;
+  };
+
+  auto NextValue = [](const APFloat &Value, bool RoundDown) {
+    APFloat NextValue = Value;
+    NextValue.next(RoundDown);
+    return NextValue;
+  };
+
+  APFloat NextCValue = NextValue(*CValue, RoundDown);
+
+  Type *DestType = FPTrunc.getOperand(0)->getType();
+  const fltSemantics &DestFltSema =
+      DestType->getScalarType()->getFltSemantics();
+
+  APFloat ExtCValue = ConvertFltSema(*CValue, DestFltSema);
+  APFloat ExtNextCValue = ConvertFltSema(NextCValue, DestFltSema);
+
+  // When 'NextCValue' is infinity, use an imaged 'NextCValue' that equals
+  // 'CValue + bias' to avoid the infinity after conversion. The bias is
+  // estimated as 'CValue - PrevCValue', where 'PrevCValue' is the previous
+  // value of 'CValue'.
+  if (NextCValue.isInfinity()) {
+    APFloat PrevCValue = NextValue(*CValue, !RoundDown);
+    APFloat Bias = ConvertFltSema(*CValue - PrevCValue, DestFltSema);
+
+    ExtNextCValue = ExtCValue + Bias;
+  }
+
+  APFloat ExtMidValue =
+      scalbn(ExtCValue + ExtNextCValue, -1, APFloat::rmNearestTiesToEven);
+
+  const fltSemantics &SrcFltSema =
+      C.getType()->getScalarType()->getFltSemantics();
+
+  // 'MidValue' might be rounded to 'NextCValue'. Correct it here.
+  APFloat MidValue = ConvertFltSema(ExtMidValue, SrcFltSema);
+  if (MidValue != *CValue)
+    ExtMidValue.next(!RoundDown);
+
+  // Check whether 'ExtMidValue' is a valid result since the assumption on
+  // imaged 'NextCValue' might not hold for new float types.
+  // ppc_fp128 can't pass here when converting from max float because of
+  // APFloat implementation.
+  if (NextCValue.isInfinity()) {
+    // ExtMidValue --- narrowed ---> Finite
+    if (ConvertFltSema(ExtMidValue, SrcFltSema).isInfinity())
+      return nullptr;
+
+    // NextExtMidValue --- narrowed ---> Infinity
+    APFloat NextExtMidValue = NextValue(ExtMidValue, RoundDown);
+    if (ConvertFltSema(NextExtMidValue, SrcFltSema).isFinite())
+      return nullptr;
+  }
+
+  return new FCmpInst(Pred, FPTrunc.getOperand(0),
+                      ConstantFP::get(DestType, ExtMidValue), "", &I);
+}
+
 /// Optimize fabs(X) compared with zero.
 static Instruction *foldFabsWithFcmpZero(FCmpInst &I, InstCombinerImpl &IC) {
   Value *X;
@@ -8522,6 +8617,10 @@ Instruction *InstCombinerImpl::visitFCmpInst(FCmpInst &I) {
                   cast<LoadInst>(LHSI), GEP, GV, I))
             return Res;
       break;
+    case Instruction::FPTrunc:
+      if (Instruction *NV = foldFCmpFpTrunc(I, *LHSI, *RHSC))
+        return NV;
+      break;
     }
   }
 
diff --git a/llvm/test/Transforms/InstCombine/fold-fcmp-trunc.ll b/llvm/test/Transforms/InstCombine/fold-fcmp-trunc.ll
new file mode 100644
index 0000000000000..371f9b6807fe4
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/fold-fcmp-trunc.ll
@@ -0,0 +1,674 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -passes=instcombine -S < %s | FileCheck %s
+
+
+define i1 @fcmp_trunc(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0x4058FFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_ult(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ult(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ult double [[TMP0]], 0x4068FFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ult float %trunc, 2.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_ole(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ole(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ole double [[TMP0]], 0x4072C00010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ole float %trunc, 3.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_ogt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ogt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ogt double [[TMP0]], 0x4079000010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ogt float %trunc, 4.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_zero(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_zero(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0xB690000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 0.000000
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_with_nnan(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_with_nnan(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp nnan oge double [[TMP0]], 0x4058FFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp nnan oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_with_ninf(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_with_ninf(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ninf oge double [[TMP0]], 0x4058FFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ninf oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_with_nsz(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_with_nsz(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp nsz oge double [[TMP0]], 0x4058FFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp nsz oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_with_reassoc(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_with_reassoc(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp reassoc oge double [[TMP0]], 0x4058FFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp reassoc oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_with_fast(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_with_fast(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp fast oge double [[TMP0]], 0x4058FFFFF0000000 
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp fast oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define <4 x i1> @fcmp_vec_trunc(<4 x double> %0) {
+; CHECK-LABEL: define <4 x i1> @fcmp_vec_trunc(
+; CHECK-SAME: <4 x double> [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[CMP:%.*]] = fcmp olt <4 x double> [[TMP0]], splat (double 0x3FEFFFFFF0000000)
+; CHECK-NEXT:    ret <4 x i1> [[CMP]]
+;
+  %vec = fptrunc <4 x double> %0 to <4 x float>
+  %cmp = fcmp olt <4 x float> %vec, <float 1.0, float 1.0, float 1.0, float 1.0>
+  ret <4 x i1> %cmp
+}
+
+define <1 x i1> @fcmp_vec_trunc_scalar(<1 x double> %0) {
+; CHECK-LABEL: define <1 x i1> @fcmp_vec_trunc_scalar(
+; CHECK-SAME: <1 x double> [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[CMP:%.*]] = fcmp fast olt <1 x double> [[TMP0]], splat (double 0x3FEFFFFFF0000000)
+; CHECK-NEXT:    ret <1 x i1> [[CMP]]
+;
+  %vec = fptrunc <1 x double> %0 to <1 x float>
+  %cmp = fcmp fast olt <1 x float> %vec, <float 1.0>
+  ret <1 x i1> %cmp
+}
+
+define i1 @fcmp_trunc_fp128(fp128 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_fp128(
+; CHECK-SAME: fp128 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp fast oge fp128 [[TMP0]], 0xL000000000000000040058FFFFF000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc fp128 %0 to float
+  %result = fcmp fast oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_x86_fp80(x86_fp80 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_x86_fp80(
+; CHECK-SAME: x86_fp80 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp fast oge x86_fp80 [[TMP0]], 0xK4005C7FFFF8000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc x86_fp80 %0 to float
+  %result = fcmp fast oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_ppc_fp128(ppc_fp128 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ppc_fp128(
+; CHECK-SAME: ppc_fp128 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp fast oge ppc_fp128 [[TMP0]], 0xM4058FFFFF00000000000000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc ppc_fp128 %0 to float
+  %result = fcmp fast oge float %trunc, 1.000000e+02
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_nan(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_nan(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    ret i1 false
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 0x7FF8000000000000
+  ret i1 %result
+}
+
+; denomalized 0x00000001
+define i1 @fcmp_trunc_d1(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_d1(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0x3690000000000001
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 1.40129846432481707092372958328991613128026194187651577175706828388979108268586060148663818836212158203125e-45
+  ret i1 %result
+}
+
+; denomalized 0x00000001 ole
+define i1 @fcmp_trunc_d1_ole(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_d1_ole(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ole double [[TMP0]], 0x36A7FFFFFFFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ole float %trunc, 1.40129846432481707092372958328991613128026194187651577175706828388979108268586060148663818836212158203125e-45
+  ret i1 %result
+}
+
+; denomalized 0x00000002
+define i1 @fcmp_trunc_d2(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_d2(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0x36A8000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 2.8025969286496341418474591665798322625605238837530315435141365677795821653717212029732763767242431640625e-45
+  ret i1 %result
+}
+
+; denomalized 0x7fffff
+define i1 @fcmp_trunc_d3(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_d3(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ogt double [[TMP0]], 0x380FFFFFDFFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ogt float %trunc, 1.175494210692441075487029444849287348827052428745893333857174530571588870475618904265502351336181163787841796875e-38
+  ret i1 %result
+}
+
+; denomalized 0x80000001
+define i1 @fcmp_trunc_d4(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_d4(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ogt double [[TMP0]], 0xB690000000000001
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ogt float %trunc, -1.40129846432481707092372958328991613128026194187651577175706828388979108268586060148663818836212158203125e-45
+  ret i1 %result
+}
+
+; denomalized 0x80000001
+define i1 @fcmp_trunc_d5(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_d5(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp olt double [[TMP0]], 0xB80FFFFFDFFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp olt float %trunc, -1.175494210692441075487029444849287348827052428745893333857174530571588870475618904265502351336181163787841796875e-38
+  ret i1 %result
+}
+
+
+; +0
+define i1 @fcmp_trunc_p0(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_p0(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0xB690000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 0x00000000
+  ret i1 %result
+}
+
+
+; -0
+define i1 @fcmp_trunc_n0(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_n0(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ogt double [[TMP0]], 0x3690000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ogt float %trunc, 0x8000000000000000
+  ret i1 %result
+}
+
+
+; max representable
+define i1 @fcmp_trunc_mx(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mx(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ogt double [[TMP0]], 0x47EFFFFFEFFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ogt float %trunc, 0x47EFFFFFE0000000
+  ret i1 %result
+}
+
+; negative max representable
+define i1 @fcmp_trunc_mn(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mn(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp olt double [[TMP0]], 0xC7EFFFFFEFFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp olt float %trunc, -3.4028234663852885981170418348451692544e38
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_literal_nan(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_literal_nan(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    ret i1 false
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 0x7FF8000000000000
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_literal_positive_inf(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_literal_positive_inf(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[TMP0]] to float
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oeq float [[TRUNC]], 0x7FF0000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 0x7FF0000000000000
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_literal_negative_inf(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_literal_negative_inf(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[TMP0]] to float
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp uno float [[TRUNC]], 0.000000e+00
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ult float %trunc, 0xFFF0000000000000
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_nan_ugt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_nan_ugt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    ret i1 true
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ugt float %trunc, 0x7FF8000000000000
+  ret i1 %result
+}
+
+define i1 @fcmp_trunc_inf_uge(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_inf_uge(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc double [[TMP0]] to float
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ueq float [[TRUNC]], 0x7FF0000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp uge float %trunc, 0x7FF0000000000000
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_ninf_olt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ninf_olt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    ret i1 false
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp olt float %trunc, 0xFFF0000000000000
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_uge(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_uge(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp uge double [[TMP0]], 0x405EBFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp uge float %trunc, 123.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_uge(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_uge(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp uge double [[TMP0]], 0xC05EC00010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp uge float %trunc, -123.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_oge(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_oge(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0x405EBFFFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, 123.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_oge(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_oge(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge double [[TMP0]], 0xC05EC00010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp oge float %trunc, -123.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_ugt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ugt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ugt double [[TMP0]], 0x40FE0F3010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ugt float %trunc, 123123.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_ugt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_ugt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ugt double [[TMP0]], 0xC0FE1B8FF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ugt float %trunc, -123321.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_ogt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_ogt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ogt double [[TMP0]], 0xC0FE1B8FF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ogt float %trunc, -123321.0
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_ule(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_ule(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ule double [[TMP0]], 0x408ED80010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ule float %trunc, 987.0
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_neg_ule(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_ule(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ule double [[TMP0]], 0xC088A7FFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ule float %trunc, -789.0
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_neg_ole(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_ole(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ole double [[TMP0]], 0xC088A7FFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ole float %trunc, -789.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_ult(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_ult(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ult double [[TMP0]], 0xC088A80010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp ult float %trunc, -789.0
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_olt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_olt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp olt double [[TMP0]], 0x408ED7FFF0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp olt float %trunc, 987.0
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_neg_olt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_olt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp olt double [[TMP0]], 0xC088A80010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp olt float %trunc, -789.0
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_nsz_uge(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_nsz_uge(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp nsz uge double [[TMP0]], 0xC05EC00010000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp nsz uge float %trunc, -123.0
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_reassoc_ugt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_reassoc_ugt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp reassoc ugt double [[TMP0]], 0x40889F8210000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp reassoc ugt float %trunc, 787.9384765625
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_reassoc_ugt(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_reassoc_ugt(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp reassoc ugt double [[TMP0]], 0xC0889F81F0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp reassoc ugt float %trunc, -787.9384765625
+  ret i1 %result
+}
+
+
+
+define i1 @fcmp_trunc_fast_ult(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_fast_ult(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp fast uge double [[TMP0]], 0x40F8E8E010000001
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp fast uge float %trunc, 102030.0078125
+  ret i1 %result
+}
+
+
+define i1 @fcmp_trunc_neg_fast_ult(double %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_neg_fast_ult(
+; CHECK-SAME: double [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp fast uge double [[TMP0]], 0xC0F8E8E02FFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc double %0 to float
+  %result = fcmp fast uge float %trunc, -102030.0078125
+  ret i1 %result
+}
+
+
+; max representable float to fp128
+define i1 @fcmp_trunc_mx_fp128(fp128 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mx_fp128(
+; CHECK-SAME: fp128 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ole fp128 [[TMP0]], 0xLFFFFFFFFFFFFFFFF407EFFFFFEFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc fp128 %0 to float
+  %result = fcmp ole float %trunc, 0x47EFFFFFE0000000
+  ret i1 %result
+}
+
+
+; max representable float to x86_fp80
+define i1 @fcmp_trunc_mx_x86_fp80(x86_fp80 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mx_x86_fp80(
+; CHECK-SAME: x86_fp80 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ule x86_fp80 [[TMP0]], 0xK407EFFFFFF7FFFFFFFFF
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc x86_fp80 %0 to float
+  %result = fcmp ule float %trunc, 0x47EFFFFFE0000000
+  ret i1 %result
+}
+
+
+; max representable float to ppc_fp128
+define i1 @fcmp_trunc_mx_ppc_fp128(ppc_fp128 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mx_ppc_fp128(
+; CHECK-SAME: ppc_fp128 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[TRUNC:%.*]] = fptrunc ppc_fp128 [[TMP0]] to float
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp ole float [[TRUNC]], 0x47EFFFFFE0000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc ppc_fp128 %0 to float
+  %result = fcmp ole float %trunc, 0x47EFFFFFE0000000
+  ret i1 %result
+}
+
+
+; negative max representable float to fp128
+define i1 @fcmp_trunc_mn_fp128(fp128 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mn_fp128(
+; CHECK-SAME: fp128 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp olt fp128 [[TMP0]], 0xL0000000000000000C07EFFFFF1000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc fp128 %0 to float
+  %result = fcmp olt float %trunc, 0xC7EFFFFF00000000
+  ret i1 %result
+}
+
+
+; negative max representable float to x86_fp80
+define i1 @fcmp_trunc_mn_x86_fp80(x86_fp80 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mn_x86_fp80(
+; CHECK-SAME: x86_fp80 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp oge x86_fp80 [[TMP0]], 0xKC07EFFFFF88000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc x86_fp80 %0 to float
+  %result = fcmp oge float %trunc, 0xC7EFFFFF00000000
+  ret i1 %result
+}
+
+
+; negative max representable float to ppc_fp128
+define i1 @fcmp_trunc_mn_ppc_fp128(ppc_fp128 %0) {
+; CHECK-LABEL: define i1 @fcmp_trunc_mn_ppc_fp128(
+; CHECK-SAME: ppc_fp128 [[TMP0:%.*]]) {
+; CHECK-NEXT:    [[RESULT:%.*]] = fcmp uge ppc_fp128 [[TMP0]], 0xMC7EFFFFF100000000000000000000000
+; CHECK-NEXT:    ret i1 [[RESULT]]
+;
+  %trunc = fptrunc ppc_fp128 %0 to float
+  %result = fcmp uge float %trunc, 0xC7EFFFFF00000000
+  ret i1 %result
+}
+