Index: llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
===================================================================
--- llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
+++ llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
@@ -556,7 +556,7 @@
       if (MMO.isAtomic() && UseMI.getOpcode() != TargetOpcode::G_ANYEXT)
         continue;
       // Check for legality.
-      if (LI) {
+      if (!isPreLegalize()) {
         LegalityQuery::MemDesc MMDesc(MMO);
         unsigned CandidateLoadOpc = getExtLoadOpcForExtend(UseMI.getOpcode());
         LLT UseTy = MRI.getType(UseMI.getOperand(0).getReg());
@@ -5221,7 +5221,7 @@
     return false;
 
   // Floating-point multiply-add with intermediate rounding.
-  HasFMAD = (LI && TLI.isFMADLegal(MI, DstType));
+  HasFMAD = (!isPreLegalize() && TLI.isFMADLegal(MI, DstType));
   // Floating-point multiply-add without intermediate rounding.
   bool HasFMA = TLI.isFMAFasterThanFMulAndFAdd(*MF, DstType) &&
                 isLegalOrBeforeLegalizer({TargetOpcode::G_FMA, {DstType}});
Index: llvm/lib/Target/AMDGPU/AMDGPUPreLegalizerCombiner.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUPreLegalizerCombiner.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUPreLegalizerCombiner.cpp
@@ -198,7 +198,8 @@
 bool AMDGPUPreLegalizerCombinerInfo::combine(GISelChangeObserver &Observer,
                                               MachineInstr &MI,
                                               MachineIRBuilder &B) const {
-  AMDGPUCombinerHelper Helper(Observer, B, /*IsPreLegalize*/ true, KB, MDT);
+  const auto *LI = MI.getMF()->getSubtarget().getLegalizerInfo();
+  AMDGPUCombinerHelper Helper(Observer, B, /*IsPreLegalize*/ true, KB, MDT, LI);
   AMDGPUPreLegalizerCombinerHelper PreLegalizerHelper(B, Helper);
   AMDGPUGenPreLegalizerCombinerHelper Generated(GeneratedRuleCfg, Helper,
                                                 PreLegalizerHelper);
Index: llvm/test/CodeGen/AMDGPU/GlobalISel/select-to-fmin-fmax.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/AMDGPU/GlobalISel/select-to-fmin-fmax.ll
@@ -0,0 +1,156 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -global-isel -mtriple=amdgcn-amd-amdpal -mcpu=gfx900 -verify-machineinstrs %s -o - | FileCheck -check-prefixes=GCN %s
+
+define half @test_s16(half %a) #0 {
+; GCN-LABEL: test_s16:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v0
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, 0, vcc
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt half %a, 0.0
+  %sel = select i1 %fcmp, half 0.0, half %a
+  ret half %sel
+}
+
+define float @test_s32(float %a) #0 {
+; GCN-LABEL: test_s32:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, 0, vcc
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt float %a, 0.0
+  %sel = select i1 %fcmp, float 0.0, float %a
+  ret float %sel
+}
+
+define double @test_s64(double %a) #0 {
+; GCN-LABEL: test_s64:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_cmp_gt_f64_e32 vcc, 0, v[0:1]
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v1, 0, vcc
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt double %a, 0.0
+  %sel = select i1 %fcmp, double 0.0, double %a
+  ret double %sel
+}
+
+define <4 x half> @test_v4s16(<4 x half> %a) #0 {
+; GCN-LABEL: test_v4s16:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    s_mov_b32 s6, 0
+; GCN-NEXT:    v_lshrrev_b32_e32 v2, 16, v0
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v0
+; GCN-NEXT:    v_cmp_lt_f16_sdwa s[4:5], v0, s6 src0_sel:WORD_1 src1_sel:DWORD
+; GCN-NEXT:    v_lshrrev_b32_e32 v3, 16, v1
+; GCN-NEXT:    v_cndmask_b32_e64 v4, v0, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v2, 0, s[4:5]
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v1
+; GCN-NEXT:    v_cmp_lt_f16_sdwa s[4:5], v1, s6 src0_sel:WORD_1 src1_sel:DWORD
+; GCN-NEXT:    v_cndmask_b32_e64 v2, v1, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v3, 0, s[4:5]
+; GCN-NEXT:    s_mov_b32 s4, 0x5040100
+; GCN-NEXT:    v_perm_b32 v0, v0, v4, s4
+; GCN-NEXT:    v_perm_b32 v1, v1, v2, s4
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt <4 x half> %a, zeroinitializer
+  %sel = select <4 x i1> %fcmp, <4 x half> zeroinitializer, <4 x half> %a
+  ret <4 x half> %sel
+}
+
+define <8 x half> @test_v8s16(<8 x half> %a) #0 {
+; GCN-LABEL: test_v8s16:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    s_mov_b32 s6, 0
+; GCN-NEXT:    v_lshrrev_b32_e32 v4, 16, v0
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v0
+; GCN-NEXT:    v_cmp_lt_f16_sdwa s[4:5], v0, s6 src0_sel:WORD_1 src1_sel:DWORD
+; GCN-NEXT:    v_lshrrev_b32_e32 v5, 16, v1
+; GCN-NEXT:    v_cndmask_b32_e64 v8, v0, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v4, 0, s[4:5]
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v1
+; GCN-NEXT:    v_cmp_lt_f16_sdwa s[4:5], v1, s6 src0_sel:WORD_1 src1_sel:DWORD
+; GCN-NEXT:    v_lshrrev_b32_e32 v6, 16, v2
+; GCN-NEXT:    v_cndmask_b32_e64 v4, v1, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v5, 0, s[4:5]
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v2
+; GCN-NEXT:    v_cmp_lt_f16_sdwa s[4:5], v2, s6 src0_sel:WORD_1 src1_sel:DWORD
+; GCN-NEXT:    v_lshrrev_b32_e32 v7, 16, v3
+; GCN-NEXT:    v_cndmask_b32_e64 v5, v2, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v2, v6, 0, s[4:5]
+; GCN-NEXT:    v_cmp_gt_f16_e32 vcc, 0, v3
+; GCN-NEXT:    v_cmp_lt_f16_sdwa s[4:5], v3, s6 src0_sel:WORD_1 src1_sel:DWORD
+; GCN-NEXT:    v_cndmask_b32_e64 v6, v3, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v3, v7, 0, s[4:5]
+; GCN-NEXT:    s_mov_b32 s4, 0x5040100
+; GCN-NEXT:    v_perm_b32 v0, v0, v8, s4
+; GCN-NEXT:    v_perm_b32 v1, v1, v4, s4
+; GCN-NEXT:    v_perm_b32 v2, v2, v5, s4
+; GCN-NEXT:    v_perm_b32 v3, v3, v6, s4
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt <8 x half> %a, zeroinitializer
+  %sel = select <8 x i1> %fcmp, <8 x half> zeroinitializer, <8 x half> %a
+  ret <8 x half> %sel
+}
+
+define <2 x float> @test_v2s32(<2 x float> %a) #0 {
+; GCN-LABEL: test_v2s32:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, 0, vcc
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v1
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v1, 0, vcc
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt <2 x float> %a, zeroinitializer
+  %sel = select <2 x i1> %fcmp, <2 x float> zeroinitializer, <2 x float> %a
+  ret <2 x float> %sel
+}
+
+define <4 x float> @test_v4s32(<4 x float> %a) #0 {
+; GCN-LABEL: test_v4s32:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v0
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, 0, vcc
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v1
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v1, 0, vcc
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v2
+; GCN-NEXT:    v_cndmask_b32_e64 v2, v2, 0, vcc
+; GCN-NEXT:    v_cmp_gt_f32_e32 vcc, 0, v3
+; GCN-NEXT:    v_cndmask_b32_e64 v3, v3, 0, vcc
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt <4 x float> %a, zeroinitializer
+  %sel = select <4 x i1> %fcmp, <4 x float> zeroinitializer, <4 x float> %a
+  ret <4 x float> %sel
+}
+
+define <2 x double> @test_v2s64(<2 x double> %a) #0 {
+; GCN-LABEL: test_v2s64:
+; GCN:       ; %bb.0: ; %entry
+; GCN-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
+; GCN-NEXT:    v_cmp_gt_f64_e32 vcc, 0, v[0:1]
+; GCN-NEXT:    v_cmp_gt_f64_e64 s[4:5], 0, v[2:3]
+; GCN-NEXT:    v_cndmask_b32_e64 v0, v0, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v2, v2, 0, s[4:5]
+; GCN-NEXT:    v_cndmask_b32_e64 v1, v1, 0, vcc
+; GCN-NEXT:    v_cndmask_b32_e64 v3, v3, 0, s[4:5]
+; GCN-NEXT:    s_setpc_b64 s[30:31]
+entry:
+  %fcmp = fcmp olt <2 x double> %a, zeroinitializer
+  %sel = select <2 x i1> %fcmp, <2 x double> zeroinitializer, <2 x double> %a
+  ret <2 x double> %sel
+}
+