Index: mlir/lib/Conversion/ArithToLLVM/ArithToLLVM.cpp
===================================================================
--- mlir/lib/Conversion/ArithToLLVM/ArithToLLVM.cpp
+++ mlir/lib/Conversion/ArithToLLVM/ArithToLLVM.cpp
@@ -52,16 +52,16 @@
     VectorConvertToLLVMPattern<arith::FPToSIOp, LLVM::FPToSIOp>;
 using FPToUIOpLowering =
     VectorConvertToLLVMPattern<arith::FPToUIOp, LLVM::FPToUIOp>;
-// TODO: Add LLVM intrinsic support for fastmath
-using MaxFOpLowering = VectorConvertToLLVMPattern<arith::MaxFOp, LLVM::MaxNumOp,
-                                                  arith::AttrDropFastMath>;
+using MaxFOpLowering =
+    VectorConvertToLLVMPattern<arith::MaxFOp, LLVM::MaxNumOp,
+                               arith::AttrConvertFastMathToLLVM>;
 using MaxSIOpLowering =
     VectorConvertToLLVMPattern<arith::MaxSIOp, LLVM::SMaxOp>;
 using MaxUIOpLowering =
     VectorConvertToLLVMPattern<arith::MaxUIOp, LLVM::UMaxOp>;
-// TODO: Add LLVM intrinsic support for fastmath
-using MinFOpLowering = VectorConvertToLLVMPattern<arith::MinFOp, LLVM::MinNumOp,
-                                                  arith::AttrDropFastMath>;
+using MinFOpLowering =
+    VectorConvertToLLVMPattern<arith::MinFOp, LLVM::MinNumOp,
+                               arith::AttrConvertFastMathToLLVM>;
 using MinSIOpLowering =
     VectorConvertToLLVMPattern<arith::MinSIOp, LLVM::SMinOp>;
 using MinUIOpLowering =
@@ -74,9 +74,9 @@
     VectorConvertToLLVMPattern<arith::NegFOp, LLVM::FNegOp,
                                arith::AttrConvertFastMathToLLVM>;
 using OrIOpLowering = VectorConvertToLLVMPattern<arith::OrIOp, LLVM::OrOp>;
-// TODO: Add LLVM intrinsic support for fastmath
-using RemFOpLowering = VectorConvertToLLVMPattern<arith::RemFOp, LLVM::FRemOp,
-                                                  arith::AttrDropFastMath>;
+using RemFOpLowering =
+    VectorConvertToLLVMPattern<arith::RemFOp, LLVM::FRemOp,
+                               arith::AttrConvertFastMathToLLVM>;
 using RemSIOpLowering =
     VectorConvertToLLVMPattern<arith::RemSIOp, LLVM::SRemOp>;
 using RemUIOpLowering =
Index: mlir/test/Conversion/ArithToLLVM/arith-to-llvm.mlir
===================================================================
--- mlir/test/Conversion/ArithToLLVM/arith-to-llvm.mlir
+++ mlir/test/Conversion/ArithToLLVM/arith-to-llvm.mlir
@@ -453,11 +453,11 @@
 
 // CHECK-LABEL: @fastmath
 func.func @fastmath(%arg0: f32, %arg1: f32, %arg2: i32) {
-// CHECK: {{.*}} = llvm.fadd %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
-// CHECK: {{.*}} = llvm.fmul %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
-// CHECK: {{.*}} = llvm.fneg %arg0  {fastmathFlags = #llvm.fastmath<fast>} : f32
-// CHECK: {{.*}} = llvm.fadd %arg0, %arg1  : f32
-// CHECK: {{.*}} = llvm.fadd %arg0, %arg1  {fastmathFlags = #llvm.fastmath<nnan, ninf>} : f32
+// CHECK: llvm.fadd %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+// CHECK: llvm.fmul %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+// CHECK: llvm.fneg %arg0  {fastmathFlags = #llvm.fastmath<fast>} : f32
+// CHECK: llvm.fadd %arg0, %arg1  : f32
+// CHECK: llvm.fadd %arg0, %arg1  {fastmathFlags = #llvm.fastmath<nnan, ninf>} : f32
   %0 = arith.addf %arg0, %arg1 fastmath<fast> : f32
   %1 = arith.mulf %arg0, %arg1 fastmath<fast> : f32
   %2 = arith.negf %arg0 fastmath<fast> : f32
@@ -465,3 +465,26 @@
   %4 = arith.addf %arg0, %arg1 fastmath<nnan,ninf> : f32
   return
 }
+
+// -----
+
+// CHECK-LABEL: @ops_supporting_fastmath
+func.func @ops_supporting_fastmath(%arg0: f32, %arg1: f32, %arg2: i32) {
+// CHECK: llvm.fadd %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+  %0 = arith.addf %arg0, %arg1 fastmath<fast> : f32
+// CHECK: llvm.fdiv %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+  %1 = arith.divf %arg0, %arg1 fastmath<fast> : f32
+// CHECK: llvm.intr.maxnum(%arg0, %arg1) {fastmathFlags = #llvm.fastmath<fast>} : (f32, f32) -> f32
+  %2 = arith.maxf %arg0, %arg1 fastmath<fast> : f32
+// CHECK: llvm.intr.minnum(%arg0, %arg1) {fastmathFlags = #llvm.fastmath<fast>} : (f32, f32) -> f32
+  %3 = arith.minf %arg0, %arg1 fastmath<fast> : f32
+// CHECK: llvm.fmul %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+  %4 = arith.mulf %arg0, %arg1 fastmath<fast> : f32
+// CHECK: llvm.fneg %arg0  {fastmathFlags = #llvm.fastmath<fast>} : f32
+  %5 = arith.negf %arg0 fastmath<fast> : f32
+// CHECK: llvm.frem %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+  %6 = arith.remf %arg0, %arg1 fastmath<fast> : f32
+// CHECK: llvm.fsub %arg0, %arg1  {fastmathFlags = #llvm.fastmath<fast>} : f32
+  %7 = arith.subf %arg0, %arg1 fastmath<fast> : f32
+  return
+}