diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index f818c4e..3640b77 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -4255,6 +4255,8 @@
     return lowerShlSat(MI);
   case G_ABS:
     return lowerAbsToAddXor(MI);
+  case G_FABS:
+    return lowerFAbs(MI);
   case G_SELECT:
     return lowerSelect(MI);
   case G_IS_FPCLASS:
@@ -8761,6 +8763,22 @@
   return Legalized;
 }
 
+LegalizerHelper::LegalizeResult LegalizerHelper::lowerFAbs(MachineInstr &MI) {
+  Register SrcReg = MI.getOperand(1).getReg();
+  Register DstReg = MI.getOperand(0).getReg();
+
+  LLT Ty = MRI.getType(DstReg);
+
+  // Reset sign bit
+  MIRBuilder.buildAnd(
+      DstReg, SrcReg,
+      MIRBuilder.buildConstant(
+          Ty, APInt::getSignedMaxValue(Ty.getScalarSizeInBits())));
+
+  MI.eraseFromParent();
+  return Legalized;
+}
+
 LegalizerHelper::LegalizeResult
 LegalizerHelper::lowerVectorReduction(MachineInstr &MI) {
   Register SrcReg = MI.getOperand(1).getReg();