Index: include/llvm/Support/TargetOpcodes.def
===================================================================
--- include/llvm/Support/TargetOpcodes.def
+++ include/llvm/Support/TargetOpcodes.def
@@ -454,6 +454,9 @@
 /// Floating point base-2 logarithm of a value.
 HANDLE_TARGET_OPCODE(G_FLOG2)
 
+/// Floating point base-10 logarithm of a value.
+HANDLE_TARGET_OPCODE(G_FLOG10)
+
 /// Generic FP negation.
 HANDLE_TARGET_OPCODE(G_FNEG)
 
Index: include/llvm/Target/GenericOpcodes.td
===================================================================
--- include/llvm/Target/GenericOpcodes.td
+++ include/llvm/Target/GenericOpcodes.td
@@ -540,6 +540,13 @@
   let hasSideEffects = 0;
 }
 
+// Floating point base-10 logarithm of a value.
+def G_FLOG10 : GenericInstruction {
+  let OutOperandList = (outs type0:$dst);
+  let InOperandList = (ins type0:$src1);
+  let hasSideEffects = 0;
+}
+
 //------------------------------------------------------------------------------
 // Opcodes for LLVM Intrinsics
 //------------------------------------------------------------------------------
Index: lib/CodeGen/GlobalISel/IRTranslator.cpp
===================================================================
--- lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -895,6 +895,11 @@
         .addDef(getOrCreateVReg(CI))
         .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
     return true;
+  case Intrinsic::log10:
+    MIRBuilder.buildInstr(TargetOpcode::G_FLOG10)
+        .addDef(getOrCreateVReg(CI))
+        .addUse(getOrCreateVReg(*CI.getArgOperand(0)));
+    return true;
   case Intrinsic::fabs:
     MIRBuilder.buildInstr(TargetOpcode::G_FABS)
         .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
@@ -1396,6 +1396,16 @@
   ret float %res
 }
 
+declare float @llvm.log10.f32(float)
+define float @test_log10_intrin(float %a) {
+; CHECK-LABEL: name: test_log10_intrin
+; CHECK: [[A:%[0-9]+]]:_(s32) = COPY $s0
+; CHECK: [[RES:%[0-9]+]]:_(s32) = G_FLOG10 [[A]]
+; CHECK: $s0 = COPY [[RES]]
+  %res = call float @llvm.log10.f32(float %a)
+  ret float %res
+}
+
 declare float @llvm.fabs.f32(float)
 define float @test_fabs_intrin(float %a) {
 ; CHECK-LABEL: name: test_fabs_intrin
Index: test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
===================================================================
--- test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
+++ test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir
@@ -267,6 +267,9 @@
 # DEBUG-NEXT: G_FLOG2 (opcode {{[0-9]+}}): 1 type index
 # DEBUG:      .. type index coverage check SKIPPED: no rules defined
 #
+# DEBUG-NEXT: G_FLOG10 (opcode {{[0-9]+}}): 1 type index
+# DEBUG:      .. type index coverage check SKIPPED: no rules defined
+#
 # DEBUG-NEXT: G_FNEG (opcode {{[0-9]+}}): 1 type index
 # DEBUG:      .. type index coverage check SKIPPED: no rules defined
 #