diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -670,15 +670,14 @@
   }
 
   if (DestReg == AMDGPU::SCC) {
-    unsigned Opcode;
-    if (AMDGPU::SReg_32RegClass.contains(SrcReg)) {
-      Opcode = AMDGPU::S_CMP_LG_U32;
-    } else {
-      assert(AMDGPU::SReg_64RegClass.contains(SrcReg));
-      Opcode = AMDGPU::S_CMP_LG_U64;
+
+    // We only care about the low bit here.
+    if (AMDGPU::SReg_64RegClass.contains(SrcReg)) {
+      SrcReg = RI.getSubReg(SrcReg, AMDGPU::sub0);
     }
+    assert(AMDGPU::SReg_32RegClass.contains(SrcReg));
 
-    BuildMI(MBB, MI, DL, get(Opcode))
+    BuildMI(MBB, MI, DL, get(AMDGPU::S_CMP_LG_U32))
         .addReg(SrcReg, getKillRegState(KillSrc))
         .addImm(0);
 
diff --git a/llvm/lib/Target/AMDGPU/SOPInstructions.td b/llvm/lib/Target/AMDGPU/SOPInstructions.td
--- a/llvm/lib/Target/AMDGPU/SOPInstructions.td
+++ b/llvm/lib/Target/AMDGPU/SOPInstructions.td
@@ -471,15 +471,14 @@
   [{ return N->getOperand(0)->hasOneUse() && !N->isDivergent(); }]
 >;
 
-let Uses = [SCC], AddedComplexity = 20 in {
-  def S_CSELECT_B64 : SOP2_64 <"s_cselect_b64",
-    [(set i64:$sdst, (SelectPat<select> i64:$src0, i64:$src1))]
-  >;
-
-  def S_CSELECT_B32 : SOP2_32 <"s_cselect_b32",
-    [(set i32:$sdst, (SelectPat<select> i32:$src0, i32:$src1))]
->;
+let Uses = [SCC] in {
+  let AddedComplexity = 20 in {
+    def S_CSELECT_B32 : SOP2_32 <"s_cselect_b32",
+      [(set i32:$sdst, (SelectPat<select> i32:$src0, i32:$src1))]
+    >;
+  }
 
+  def S_CSELECT_B64 : SOP2_64 <"s_cselect_b64">;
 } // End Uses = [SCC]
 
 let Defs = [SCC] in {
diff --git a/llvm/test/CodeGen/AMDGPU/addrspacecast.ll b/llvm/test/CodeGen/AMDGPU/addrspacecast.ll
--- a/llvm/test/CodeGen/AMDGPU/addrspacecast.ll
+++ b/llvm/test/CodeGen/AMDGPU/addrspacecast.ll
@@ -150,7 +150,7 @@
 ; HSA: s_load_dwordx2 s{{\[}}[[PTR_LO:[0-9]+]]:[[PTR_HI:[0-9]+]]{{\]}}
 ; HSA-DAG: v_mov_b32_e32 v[[K:[0-9]+]], 0{{$}}
 ; CI-DAG: v_cmp_ne_u64_e64 s{{\[}}[[CMP_LO:[0-9]+]]:[[CMP_HI:[0-9]+]]{{\]}}, s{{\[}}[[PTR_LO]]:[[PTR_HI]]{{\]}}, 0{{$}}
-; CI-DAG: s_cmp_lg_u64 s{{\[}}[[CMP_LO]]:[[CMP_HI]]{{\]}}, 0
+; CI-DAG: s_cmp_lg_u32 s[[CMP_LO]], 0
 ; GFX9-DAG: s_cmp_lg_u64 s{{\[}}[[CMP_LO:[0-9]+]]:[[CMP_HI:[0-9]+]]{{\]}}, 0
 ; HSA-DAG: s_cselect_b32 s[[PTR_LO]], s[[PTR_LO]], -1
 ; HSA-DAG: v_mov_b32_e32 [[CASTPTR:v[0-9]+]], s[[PTR_LO]]
@@ -169,7 +169,7 @@
 ; HSA: s_load_dwordx2 s{{\[}}[[PTR_LO:[0-9]+]]:[[PTR_HI:[0-9]+]]{{\]}}
 ; HSA-DAG: v_mov_b32_e32 v[[K:[0-9]+]], 0{{$}}
 ; CI-DAG: v_cmp_ne_u64_e64 s{{\[}}[[CMP_LO:[0-9]+]]:[[CMP_HI:[0-9]+]]{{\]}}, s{{\[}}[[PTR_LO]]:[[PTR_HI]]{{\]}}, 0{{$}}
-; CI-DAG: s_cmp_lg_u64 s{{\[}}[[CMP_LO]]:[[CMP_HI]]{{\]}}, 0
+; CI-DAG: s_cmp_lg_u32 s[[CMP_LO]], 0
 ; GFX9-DAG: s_cmp_lg_u64 s{{\[}}[[CMP_LO:[0-9]+]]:[[CMP_HI:[0-9]+]]{{\]}}, 0
 ; HSA-DAG: s_cselect_b32 s[[PTR_LO]], s[[PTR_LO]], -1
 ; HSA-DAG: v_mov_b32_e32 [[CASTPTR:v[0-9]+]], s[[PTR_LO]]
diff --git a/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-idiv.ll b/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-idiv.ll
--- a/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-idiv.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare-idiv.ll
@@ -498,7 +498,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    buffer_store_short v0, off, s[4:7], 0
@@ -554,7 +554,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[2:3], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[2:3], 0
+; GCN-NEXT:    s_cmp_lg_u32 s2, 0
 ; GCN-NEXT:    s_cselect_b32 s2, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s2, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s5
@@ -709,7 +709,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    buffer_store_byte v0, off, s[4:7], 0
@@ -767,7 +767,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s3
@@ -2440,7 +2440,7 @@
 ; GCN-NEXT:    v_trunc_f32_e32 v2, v2
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s8, s10, 0
 ; GCN-NEXT:    s_ashr_i32 s2, s2, 16
 ; GCN-NEXT:    v_cvt_f32_i32_e32 v0, s2
@@ -2459,7 +2459,7 @@
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
 ; GCN-NEXT:    s_or_b32 s0, s0, 1
 ; GCN-NEXT:    v_cvt_f32_i32_e32 v0, s2
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s0, 0
 ; GCN-NEXT:    v_add_i32_e32 v3, vcc, s0, v3
 ; GCN-NEXT:    s_sext_i32_i16 s0, s1
@@ -2472,7 +2472,7 @@
 ; GCN-NEXT:    v_trunc_f32_e32 v4, v4
 ; GCN-NEXT:    v_mad_f32 v1, -v4, v0, v1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s0, 0
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v4, v4
 ; GCN-NEXT:    s_ashr_i32 s2, s3, 16
@@ -2489,7 +2489,7 @@
 ; GCN-NEXT:    v_mad_f32 v4, -v5, v0, v4
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v5, v5
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v4|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v5
 ; GCN-NEXT:    s_mov_b32 s0, 0xffff
@@ -2635,7 +2635,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s8, s10, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s8, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s2
@@ -2653,7 +2653,7 @@
 ; GCN-NEXT:    v_mad_f32 v2, -v3, v1, v2
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v3, v3
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v2|, |v1|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s8, s10, 0
 ; GCN-NEXT:    v_add_i32_e32 v1, vcc, s8, v3
 ; GCN-NEXT:    v_mul_lo_u32 v1, v1, s2
@@ -2671,7 +2671,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v4, v2, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v4, v4
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v2|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s0, 0
 ; GCN-NEXT:    v_add_i32_e32 v1, vcc, s0, v4
 ; GCN-NEXT:    s_ashr_i32 s0, s3, 16
@@ -2688,7 +2688,7 @@
 ; GCN-NEXT:    v_mad_f32 v4, -v5, v2, v4
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v5, v5
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[2:3], |v4|, |v2|
-; GCN-NEXT:    s_cmp_lg_u64 s[2:3], 0
+; GCN-NEXT:    s_cmp_lg_u32 s2, 0
 ; GCN-NEXT:    s_cselect_b32 s2, s9, 0
 ; GCN-NEXT:    v_add_i32_e32 v2, vcc, s2, v5
 ; GCN-NEXT:    v_mul_lo_u32 v2, v2, s0
@@ -2855,7 +2855,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    v_and_b32_e32 v0, 7, v0
@@ -2914,7 +2914,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s3
@@ -3278,7 +3278,7 @@
 ; GCN-NEXT:    v_trunc_f32_e32 v2, v2
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s8, s10, 0
 ; GCN-NEXT:    s_ashr_i32 s0, s0, 16
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
@@ -3297,7 +3297,7 @@
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v3, v3
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v2|, |v0|
 ; GCN-NEXT:    v_cvt_f32_i32_e32 v0, s1
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s0, 0
 ; GCN-NEXT:    v_add_i32_e32 v2, vcc, s0, v3
 ; GCN-NEXT:    s_sext_i32_i16 s0, s3
@@ -3311,7 +3311,7 @@
 ; GCN-NEXT:    v_mad_f32 v3, -v4, v0, v3
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v4, v4
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v3|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_lshlrev_b32_e32 v2, 16, v2
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v4
@@ -3427,7 +3427,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s6, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s6, v2
 ; GCN-NEXT:    v_mov_b32_e32 v2, s0
@@ -3465,7 +3465,7 @@
 ; GCN-NEXT:    v_mad_f32 v3, -v5, v4, v3
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v5, v5
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v3|, |v4|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s0, 0
 ; GCN-NEXT:    v_add_i32_e32 v3, vcc, s0, v5
 ; GCN-NEXT:    v_mul_lo_u32 v3, v3, s1
@@ -3850,7 +3850,7 @@
 ; GCN-NEXT:    v_trunc_f32_e32 v4, v4
 ; GCN-NEXT:    v_mad_f32 v3, -v4, v2, v3
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v3|, |v2|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v4, v4
 ; GCN-NEXT:    s_bfe_i32 s0, s0, 0xf000f
@@ -3869,7 +3869,7 @@
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v4|, |v2|
 ; GCN-NEXT:    v_cvt_f32_i32_e32 v2, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v5, v5
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 15
 ; GCN-NEXT:    v_add_i32_e32 v4, vcc, s0, v5
@@ -4016,7 +4016,7 @@
 ; GCN-NEXT:    s_bfe_u32 s13, s0, 0xf000f
 ; GCN-NEXT:    s_or_b32 s1, s1, 1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v3|, |v2|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-NEXT:    v_add_i32_e32 v2, vcc, s1, v4
 ; GCN-NEXT:    v_mul_lo_u32 v2, v2, s0
@@ -4034,7 +4034,7 @@
 ; GCN-NEXT:    v_mad_f32 v4, -v5, v3, v4
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v5, v5
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v4|, |v3|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    v_and_b32_e32 v1, s3, v1
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_bfe_i32 v4, v1, 0, 15
diff --git a/llvm/test/CodeGen/AMDGPU/sdiv64.ll b/llvm/test/CodeGen/AMDGPU/sdiv64.ll
--- a/llvm/test/CodeGen/AMDGPU/sdiv64.ll
+++ b/llvm/test/CodeGen/AMDGPU/sdiv64.ll
@@ -512,7 +512,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 24
@@ -542,7 +542,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-IR-NEXT:    v_bfe_i32 v0, v0, 0, 24
@@ -620,7 +620,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-NEXT:    v_ashrrev_i32_e32 v1, 31, v0
@@ -648,7 +648,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-IR-NEXT:    v_ashrrev_i32_e32 v1, 31, v0
@@ -684,7 +684,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 31
@@ -714,7 +714,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-IR-NEXT:    v_bfe_i32 v0, v0, 0, 31
@@ -751,7 +751,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 23
@@ -781,7 +781,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-IR-NEXT:    v_bfe_i32 v0, v0, 0, 23
@@ -818,7 +818,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 25
@@ -848,7 +848,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v2
 ; GCN-IR-NEXT:    v_bfe_i32 v0, v0, 0, 25
@@ -886,7 +886,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s3, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    v_cvt_f32_i32_e32 v2, s2
@@ -902,7 +902,7 @@
 ; GCN-NEXT:    v_mad_f32 v3, -v4, v2, v3
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v4, v4
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v3|, |v2|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-NEXT:    v_add_i32_e32 v2, vcc, s0, v4
 ; GCN-NEXT:    v_bfe_i32 v2, v2, 0, 24
@@ -933,7 +933,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s0, s3, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-IR-NEXT:    v_cvt_f32_i32_e32 v2, s2
@@ -949,7 +949,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v3, -v4, v2, v3
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v4, v4
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v3|, |v2|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s0, s2, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v2, vcc, s0, v4
 ; GCN-IR-NEXT:    v_bfe_i32 v2, v2, 0, 24
@@ -1884,7 +1884,7 @@
 ; GCN-NEXT:    v_mad_f32 v2, -v1, v0, s7
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v2|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v1
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 24
@@ -1911,7 +1911,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v2, -v1, v0, s7
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v2|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v1
 ; GCN-IR-NEXT:    v_bfe_i32 v0, v0, 0, 24
@@ -1943,7 +1943,7 @@
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-NEXT:    s_or_b32 s6, s4, 1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v0|, s8
-; GCN-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s4, v1
 ; GCN-NEXT:    v_bfe_i32 v0, v0, 0, 24
@@ -1969,7 +1969,7 @@
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-IR-NEXT:    s_or_b32 s6, s4, 1
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[4:5], |v0|, s8
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[4:5], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s4, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s4, s6, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s4, v1
 ; GCN-IR-NEXT:    v_bfe_i32 v0, v0, 0, 24
diff --git a/llvm/test/CodeGen/AMDGPU/srem64.ll b/llvm/test/CodeGen/AMDGPU/srem64.ll
--- a/llvm/test/CodeGen/AMDGPU/srem64.ll
+++ b/llvm/test/CodeGen/AMDGPU/srem64.ll
@@ -489,7 +489,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -521,7 +521,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -560,7 +560,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -592,7 +592,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -685,7 +685,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -717,7 +717,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -756,7 +756,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -788,7 +788,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[8:9], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[8:9], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s8, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s1, s1, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s1, v2
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, s0
@@ -827,7 +827,7 @@
 ; GCN-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s8, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s6
@@ -857,7 +857,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v1, -v2, v0, v1
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v2, v2
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v1|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s0, s8, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s0, v2
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, s6
@@ -2062,7 +2062,7 @@
 ; GCN-NEXT:    v_mad_f32 v2, -v1, v0, s6
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[6:7], |v2|, |v0|
-; GCN-NEXT:    s_cmp_lg_u64 s[6:7], 0
+; GCN-NEXT:    s_cmp_lg_u32 s6, 0
 ; GCN-NEXT:    s_cselect_b32 s5, s5, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s5, v1
 ; GCN-NEXT:    v_mul_lo_u32 v0, v0, s4
@@ -2089,7 +2089,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v2, -v1, v0, s6
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[6:7], |v2|, |v0|
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[6:7], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s6, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s5, s5, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s5, v1
 ; GCN-IR-NEXT:    v_mul_lo_u32 v0, v0, s4
@@ -2121,7 +2121,7 @@
 ; GCN-NEXT:    v_mad_f32 v0, -v1, s1, v0
 ; GCN-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v0|, s1
-; GCN-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-NEXT:    s_cselect_b32 s0, s7, 0
 ; GCN-NEXT:    v_add_i32_e32 v0, vcc, s0, v1
 ; GCN-NEXT:    s_movk_i32 s0, 0x5b7f
@@ -2150,7 +2150,7 @@
 ; GCN-IR-NEXT:    v_mad_f32 v0, -v1, s1, v0
 ; GCN-IR-NEXT:    v_cvt_i32_f32_e32 v1, v1
 ; GCN-IR-NEXT:    v_cmp_ge_f32_e64 s[0:1], |v0|, s1
-; GCN-IR-NEXT:    s_cmp_lg_u64 s[0:1], 0
+; GCN-IR-NEXT:    s_cmp_lg_u32 s0, 0
 ; GCN-IR-NEXT:    s_cselect_b32 s0, s7, 0
 ; GCN-IR-NEXT:    v_add_i32_e32 v0, vcc, s0, v1
 ; GCN-IR-NEXT:    s_movk_i32 s0, 0x5b7f
diff --git a/llvm/test/CodeGen/AMDGPU/trunc.ll b/llvm/test/CodeGen/AMDGPU/trunc.ll
--- a/llvm/test/CodeGen/AMDGPU/trunc.ll
+++ b/llvm/test/CodeGen/AMDGPU/trunc.ll
@@ -98,7 +98,7 @@
 ; VI: s_load_dwordx2 s{{\[}}[[SLO:[0-9]+]]:{{[0-9]+\]}}, {{s\[[0-9]+:[0-9]+\]}}, 0x4c
 ; GCN: s_and_b32 [[MASKED:s[0-9]+]], 1, s[[SLO]]
 ; GCN: v_cmp_eq_u32_e64 s{{\[}}[[VLO:[0-9]+]]:[[VHI:[0-9]+]]], [[MASKED]], 1{{$}}
-; GCN: s_cmp_lg_u64 s{{\[}}[[VLO]]:[[VHI]]], 0
+; GCN: s_cmp_lg_u32 s[[VLO]], 0
 ; GCN: s_cselect_b32 {{s[0-9]+}}, 63, -12
 define amdgpu_kernel void @s_trunc_i64_to_i1(i32 addrspace(1)* %out, [8 x i32], i64 %x) {
   %trunc = trunc i64 %x to i1