Index: lib/CodeGen/GlobalISel/IRTranslator.cpp
===================================================================
--- lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1076,6 +1076,11 @@
         .addDef(getOrCreateVReg(CI))
         .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
     return true;
+  case Intrinsic::floor:
+    MIRBuilder.buildInstr(TargetOpcode::G_FFLOOR)
+        .addDef(getOrCreateVReg(CI))
+        .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
+    return true;
   case Intrinsic::cos:
     MIRBuilder.buildInstr(TargetOpcode::G_FCOS)
         .addDef(getOrCreateVReg(CI))
Index: test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
===================================================================
--- test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
+++ test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll
@@ -2323,3 +2323,11 @@
   %y = call float @llvm.sqrt.f32(float %x)
   ret float %y
 }
+
+declare float @llvm.floor.f32(float)
+define float @test_floor_f32(float %x) {
+  ; CHECK-LABEL: name:            test_floor_f32
+  ; CHECK: %{{[0-9]+}}:_(s32) = G_FFLOOR %{{[0-9]+}}
+  %y = call float @llvm.floor.f32(float %x)
+  ret float %y
+}