diff --git a/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h b/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
index feb446291caf7..22569aab236af 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
@@ -511,6 +511,7 @@ class LegalizerHelper {
   LLVM_ABI LegalizeResult lowerInsert(MachineInstr &MI);
   LLVM_ABI LegalizeResult lowerSADDO_SSUBO(MachineInstr &MI);
   LLVM_ABI LegalizeResult lowerSADDE(MachineInstr &MI);
+  LLVM_ABI LegalizeResult lowerSSUBE(MachineInstr &MI);
   LLVM_ABI LegalizeResult lowerAddSubSatToMinMax(MachineInstr &MI);
   LLVM_ABI LegalizeResult lowerAddSubSatToAddoSubo(MachineInstr &MI);
   LLVM_ABI LegalizeResult lowerShlSat(MachineInstr &MI);
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index d87e335f837d2..f3e036ed1b947 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -4457,6 +4457,8 @@ LegalizerHelper::lower(MachineInstr &MI, unsigned TypeIdx, LLT LowerHintTy) {
     return lowerSADDO_SSUBO(MI);
   case TargetOpcode::G_SADDE:
     return lowerSADDE(MI);
+  case TargetOpcode::G_SSUBE:
+    return lowerSSUBE(MI);
   case TargetOpcode::G_UMULH:
   case TargetOpcode::G_SMULH:
     return lowerSMULH_UMULH(MI);
@@ -9330,6 +9332,27 @@ LegalizerHelper::LegalizeResult LegalizerHelper::lowerSADDE(MachineInstr &MI) {
   return Legalized;
 }
 
+LegalizerHelper::LegalizeResult LegalizerHelper::lowerSSUBE(MachineInstr &MI) {
+  auto [Res, OvOut, LHS, RHS, CarryIn] = MI.getFirst5Regs();
+  const LLT Ty = MRI.getType(Res);
+
+  // Diff = LHS - (RHS + zext(CarryIn))
+  auto CarryZ = MIRBuilder.buildZExt(Ty, CarryIn);
+  auto RHSPlusCI = MIRBuilder.buildAdd(Ty, RHS, CarryZ);
+  auto Diff = MIRBuilder.buildSub(Ty, LHS, RHSPlusCI);
+  MIRBuilder.buildCopy(Res, Diff);
+
+  // ov = msb((LHS ^ RHS) & (LHS ^ Diff))
+  auto X1 = MIRBuilder.buildXor(Ty, LHS, RHS);
+  auto X2 = MIRBuilder.buildXor(Ty, LHS, Diff);
+  auto T = MIRBuilder.buildAnd(Ty, X1, X2);
+  auto Zero = MIRBuilder.buildConstant(Ty, 0);
+  MIRBuilder.buildICmp(CmpInst::ICMP_SLT, OvOut, T, Zero);
+
+  MI.eraseFromParent();
+  return Legalized;
+}
+
 LegalizerHelper::LegalizeResult
 LegalizerHelper::lowerAddSubSatToMinMax(MachineInstr &MI) {
   auto [Res, LHS, RHS] = MI.getFirst3Regs();
diff --git a/llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp b/llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
index 9ce0ee1be7ea7..d21f40e848556 100644
--- a/llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
+++ b/llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
@@ -151,7 +151,7 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST)
   getActionDefinitionsBuilder(
       {G_UADDE, G_UADDO, G_USUBE, G_USUBO}).lower();
 
-  getActionDefinitionsBuilder({G_SADDO, G_SADDE, G_SSUBO})
+  getActionDefinitionsBuilder({G_SADDE, G_SADDO, G_SSUBE, G_SSUBO})
       .minScalar(0, sXLen)
       .lower();
 
diff --git a/llvm/test/CodeGen/RISCV/GlobalISel/legalizer-info-validation.mir b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer-info-validation.mir
index 7052767771c88..86084ae531cdb 100644
--- a/llvm/test/CodeGen/RISCV/GlobalISel/legalizer-info-validation.mir
+++ b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer-info-validation.mir
@@ -405,10 +405,10 @@
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: G_SADDO (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
+# DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: G_SADDE (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
-# DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: G_SSUBO (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
@@ -416,8 +416,9 @@
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: G_SSUBE (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
-# DEBUG-NEXT: .. type index coverage check SKIPPED: no rules defined
-# DEBUG-NEXT: .. imm index coverage check SKIPPED: no rules defined
+# DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
+# DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
+# DEBUG-NEXT: .. imm index coverage check SKIPPED: user-defined predicate detected
 # DEBUG-NEXT: G_UMULO (opcode {{[0-9]+}}): 2 type indices, 0 imm indices
 # DEBUG-NEXT: .. opcode {{[0-9]+}} is aliased to {{[0-9]+}}
 # DEBUG-NEXT: .. type index coverage check SKIPPED: user-defined predicate detected
diff --git a/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-ssube-rv32.mir b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-ssube-rv32.mir
new file mode 100644
index 0000000000000..2bad70a0f7592
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-ssube-rv32.mir
@@ -0,0 +1,180 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=riscv32 -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            ssube_i8
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i8
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s32) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s32) = COPY $x12
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; CHECK-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY]], [[C]](s32)
+    ; CHECK-NEXT: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; CHECK-NEXT: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; CHECK-NEXT: [[ASHR1:%[0-9]+]]:_(s32) = G_ASHR [[SHL1]], [[C]](s32)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s32) = G_SUB [[ASHR]], [[ASHR1]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C1]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s32) = G_SUB [[SUB]], [[AND]]
+    ; CHECK-NEXT: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[SUB1]], [[C]](s32)
+    ; CHECK-NEXT: [[ASHR2:%[0-9]+]]:_(s32) = G_ASHR [[SHL2]], [[C]](s32)
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s32) = G_ICMP intpred(ne), [[SUB1]](s32), [[ASHR2]]
+    ; CHECK-NEXT: $x10 = COPY [[SUB1]](s32)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s32)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s32) = COPY $x10
+    %1:_(s8) = G_TRUNC %0(s32)
+    %2:_(s32) = COPY $x11
+    %3:_(s8) = G_TRUNC %2(s32)
+    %4:_(s32) = COPY $x12
+    %5:_(s1) = G_TRUNC %4(s32)
+    %6:_(s8), %7:_(s1) = G_SSUBE %1, %3, %5
+    %8:_(s32) = G_ANYEXT %6(s8)
+    %9:_(s32) = G_ANYEXT %7(s1)
+    $x10 = COPY %8(s32)
+    $x11 = COPY %9(s32)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i16
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i16
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s32) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s32) = COPY $x12
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; CHECK-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY]], [[C]](s32)
+    ; CHECK-NEXT: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; CHECK-NEXT: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; CHECK-NEXT: [[ASHR1:%[0-9]+]]:_(s32) = G_ASHR [[SHL1]], [[C]](s32)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s32) = G_SUB [[ASHR]], [[ASHR1]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C1]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s32) = G_SUB [[SUB]], [[AND]]
+    ; CHECK-NEXT: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[SUB1]], [[C]](s32)
+    ; CHECK-NEXT: [[ASHR2:%[0-9]+]]:_(s32) = G_ASHR [[SHL2]], [[C]](s32)
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s32) = G_ICMP intpred(ne), [[SUB1]](s32), [[ASHR2]]
+    ; CHECK-NEXT: $x10 = COPY [[SUB1]](s32)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s32)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s32) = COPY $x10
+    %1:_(s16) = G_TRUNC %0(s32)
+    %2:_(s32) = COPY $x11
+    %3:_(s16) = G_TRUNC %2(s32)
+    %4:_(s32) = COPY $x12
+    %5:_(s1) = G_TRUNC %4(s32)
+    %6:_(s16), %7:_(s1) = G_SSUBE %1, %3, %5
+    %8:_(s32) = G_ANYEXT %6(s16)
+    %9:_(s32) = G_ANYEXT %7(s1)
+    $x10 = COPY %8(s32)
+    $x11 = COPY %9(s32)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i32
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i32
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s32) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s32) = COPY $x12
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[COPY1]], [[AND]]
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s32) = G_SUB [[COPY]], [[ADD]]
+    ; CHECK-NEXT: [[COPY3:%[0-9]+]]:_(s32) = COPY [[SUB]](s32)
+    ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(s32) = G_XOR [[COPY]], [[COPY1]]
+    ; CHECK-NEXT: [[XOR1:%[0-9]+]]:_(s32) = G_XOR [[COPY]], [[SUB]]
+    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s32) = G_AND [[XOR]], [[XOR1]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s32) = G_ICMP intpred(slt), [[AND1]](s32), [[C1]]
+    ; CHECK-NEXT: $x10 = COPY [[COPY3]](s32)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s32)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s32) = COPY $x10
+    %1:_(s32) = COPY $x11
+    %2:_(s32) = COPY $x12
+    %3:_(s1) = G_TRUNC %2(s32)
+    %4:_(s32), %5:_(s1) = G_SSUBE %0, %1, %3
+    %6:_(s32) = G_ANYEXT %5(s1)
+    $x10 = COPY %4(s32)
+    $x11 = COPY %6(s32)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i64
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12, $x13, $x14
+
+    ; CHECK-LABEL: name: ssube_i64
+    ; CHECK: liveins: $x10, $x11, $x12, $x13, $x14
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s32) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s32) = COPY $x12
+    ; CHECK-NEXT: [[COPY3:%[0-9]+]]:_(s32) = COPY $x13
+    ; CHECK-NEXT: [[COPY4:%[0-9]+]]:_(s32) = COPY $x14
+    ; CHECK-NEXT: [[DEF:%[0-9]+]]:_(s32) = G_IMPLICIT_DEF
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s32) = G_AND [[DEF]], [[C1]]
+    ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[COPY2]], [[AND]]
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s32) = G_ICMP intpred(ult), [[ADD]](s32), [[AND]]
+    ; CHECK-NEXT: [[COPY5:%[0-9]+]]:_(s32) = COPY [[ADD]](s32)
+    ; CHECK-NEXT: [[ADD1:%[0-9]+]]:_(s32) = G_ADD [[COPY3]], [[AND1]]
+    ; CHECK-NEXT: [[ADD2:%[0-9]+]]:_(s32) = G_ADD [[ADD1]], [[ICMP]]
+    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:_(s32) = COPY [[ADD2]](s32)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s32) = G_SUB [[COPY]], [[COPY5]]
+    ; CHECK-NEXT: [[ICMP1:%[0-9]+]]:_(s32) = G_ICMP intpred(ult), [[COPY]](s32), [[COPY5]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s32) = G_SUB [[COPY1]], [[COPY6]]
+    ; CHECK-NEXT: [[SUB2:%[0-9]+]]:_(s32) = G_SUB [[SUB1]], [[ICMP1]]
+    ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(s32) = G_XOR [[COPY]], [[COPY2]]
+    ; CHECK-NEXT: [[XOR1:%[0-9]+]]:_(s32) = G_XOR [[COPY1]], [[COPY3]]
+    ; CHECK-NEXT: [[XOR2:%[0-9]+]]:_(s32) = G_XOR [[COPY]], [[SUB]]
+    ; CHECK-NEXT: [[XOR3:%[0-9]+]]:_(s32) = G_XOR [[COPY1]], [[SUB2]]
+    ; CHECK-NEXT: [[AND2:%[0-9]+]]:_(s32) = G_AND [[XOR]], [[XOR2]]
+    ; CHECK-NEXT: [[AND3:%[0-9]+]]:_(s32) = G_AND [[XOR1]], [[XOR3]]
+    ; CHECK-NEXT: [[ICMP2:%[0-9]+]]:_(s32) = G_ICMP intpred(ult), [[AND2]](s32), [[C1]]
+    ; CHECK-NEXT: [[ICMP3:%[0-9]+]]:_(s32) = G_ICMP intpred(slt), [[AND3]](s32), [[C1]]
+    ; CHECK-NEXT: [[ICMP4:%[0-9]+]]:_(s32) = G_ICMP intpred(eq), [[AND3]](s32), [[C1]]
+    ; CHECK-NEXT: [[SELECT:%[0-9]+]]:_(s32) = G_SELECT [[ICMP4]](s32), [[ICMP2]], [[ICMP3]]
+    ; CHECK-NEXT: $x10 = COPY [[SUB]](s32)
+    ; CHECK-NEXT: $x11 = COPY [[SUB2]](s32)
+    ; CHECK-NEXT: $x12 = COPY [[SELECT]](s32)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11, implicit $x12
+    %0:_(s32) = COPY $x10
+    %1:_(s32) = COPY $x11
+    %2:_(s64) = G_MERGE_VALUES %0(s32), %1(s32)
+    %3:_(s32) = COPY $x12
+    %4:_(s32) = COPY $x13
+    %5:_(s64) = G_MERGE_VALUES %3(s32), %4(s32)
+    %6:_(s32) = COPY $x14
+    %7:_(s1)  = G_TRUNC %6(s32)
+    %8:_(s64), %9:_(s1) = G_SSUBE %2, %5, %7
+    %10:_(s32), %11:_(s32) = G_UNMERGE_VALUES %8(s64)
+    %12:_(s32) = G_ANYEXT %9(s1)
+    $x10 = COPY %10(s32)
+    $x11 = COPY %11(s32)
+    $x12 = COPY %12(s32)
+    PseudoRET implicit $x10, implicit $x11, implicit $x12
+...
diff --git a/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-ssube-rv64.mir b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-ssube-rv64.mir
new file mode 100644
index 0000000000000..ebde56d4dea1f
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-ssube-rv64.mir
@@ -0,0 +1,220 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=riscv64 -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            ssube_i8
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i8
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 56
+    ; CHECK-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[COPY]], [[C]](s64)
+    ; CHECK-NEXT: [[ASHR:%[0-9]+]]:_(s64) = G_ASHR [[SHL]], [[C]](s64)
+    ; CHECK-NEXT: [[SHL1:%[0-9]+]]:_(s64) = G_SHL [[COPY1]], [[C]](s64)
+    ; CHECK-NEXT: [[ASHR1:%[0-9]+]]:_(s64) = G_ASHR [[SHL1]], [[C]](s64)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[ASHR]], [[ASHR1]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C1]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[SUB]], [[AND]]
+    ; CHECK-NEXT: [[SHL2:%[0-9]+]]:_(s64) = G_SHL [[SUB1]], [[C]](s64)
+    ; CHECK-NEXT: [[ASHR2:%[0-9]+]]:_(s64) = G_ASHR [[SHL2]], [[C]](s64)
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ne), [[SUB1]](s64), [[ASHR2]]
+    ; CHECK-NEXT: $x10 = COPY [[SUB1]](s64)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s64) = COPY $x10
+    %1:_(s8) = G_TRUNC %0(s64)
+    %2:_(s64) = COPY $x11
+    %3:_(s8) = G_TRUNC %2(s64)
+    %4:_(s64) = COPY $x12
+    %5:_(s1) = G_TRUNC %4(s64)
+    %6:_(s8), %7:_(s1) = G_SSUBE %1, %3, %5
+    %8:_(s64) = G_ANYEXT %6(s8)
+    %9:_(s64) = G_ANYEXT %7(s1)
+    $x10 = COPY %8(s64)
+    $x11 = COPY %9(s64)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i16
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i16
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 48
+    ; CHECK-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[COPY]], [[C]](s64)
+    ; CHECK-NEXT: [[ASHR:%[0-9]+]]:_(s64) = G_ASHR [[SHL]], [[C]](s64)
+    ; CHECK-NEXT: [[SHL1:%[0-9]+]]:_(s64) = G_SHL [[COPY1]], [[C]](s64)
+    ; CHECK-NEXT: [[ASHR1:%[0-9]+]]:_(s64) = G_ASHR [[SHL1]], [[C]](s64)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[ASHR]], [[ASHR1]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C1]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[SUB]], [[AND]]
+    ; CHECK-NEXT: [[SHL2:%[0-9]+]]:_(s64) = G_SHL [[SUB1]], [[C]](s64)
+    ; CHECK-NEXT: [[ASHR2:%[0-9]+]]:_(s64) = G_ASHR [[SHL2]], [[C]](s64)
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ne), [[SUB1]](s64), [[ASHR2]]
+    ; CHECK-NEXT: $x10 = COPY [[SUB1]](s64)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s64) = COPY $x10
+    %1:_(s16) = G_TRUNC %0(s64)
+    %2:_(s64) = COPY $x11
+    %3:_(s16) = G_TRUNC %2(s64)
+    %4:_(s64) = COPY $x12
+    %5:_(s1) = G_TRUNC %4(s64)
+    %6:_(s16), %7:_(s1) = G_SSUBE %1, %3, %5
+    %8:_(s64) = G_ANYEXT %6(s16)
+    %9:_(s64) = G_ANYEXT %7(s1)
+    $x10 = COPY %8(s64)
+    $x11 = COPY %9(s64)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i32
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i32
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+    ; CHECK-NEXT: [[SEXT_INREG:%[0-9]+]]:_(s64) = G_SEXT_INREG [[COPY]], 32
+    ; CHECK-NEXT: [[SEXT_INREG1:%[0-9]+]]:_(s64) = G_SEXT_INREG [[COPY1]], 32
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[SEXT_INREG]], [[SEXT_INREG1]]
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[SUB]], [[AND]]
+    ; CHECK-NEXT: [[SEXT_INREG2:%[0-9]+]]:_(s64) = G_SEXT_INREG [[SUB1]], 32
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ne), [[SUB1]](s64), [[SEXT_INREG2]]
+    ; CHECK-NEXT: $x10 = COPY [[SUB1]](s64)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s64) = COPY $x10
+    %1:_(s32) = G_TRUNC %0(s64)
+    %2:_(s64) = COPY $x11
+    %3:_(s32) = G_TRUNC %2(s64)
+    %4:_(s64) = COPY $x12
+    %5:_(s1) = G_TRUNC %4(s64)
+    %6:_(s32), %7:_(s1) = G_SSUBE %1, %3, %5
+    %8:_(s64) = G_ANYEXT %6(s32)
+    %9:_(s64) = G_ANYEXT %7(s1)
+    $x10 = COPY %8(s64)
+    $x11 = COPY %9(s64)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i64
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12
+
+    ; CHECK-LABEL: name: ssube_i64
+    ; CHECK: liveins: $x10, $x11, $x12
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY2]], [[C]]
+    ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s64) = G_ADD [[COPY1]], [[AND]]
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[COPY]], [[ADD]]
+    ; CHECK-NEXT: [[COPY3:%[0-9]+]]:_(s64) = COPY [[SUB]](s64)
+    ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[COPY1]]
+    ; CHECK-NEXT: [[XOR1:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[SUB]]
+    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s64) = G_AND [[XOR]], [[XOR1]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(slt), [[AND1]](s64), [[C1]]
+    ; CHECK-NEXT: $x10 = COPY [[COPY3]](s64)
+    ; CHECK-NEXT: $x11 = COPY [[ICMP]](s64)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11
+    %0:_(s64) = COPY $x10
+    %1:_(s64) = COPY $x11
+    %2:_(s64) = COPY $x12
+    %3:_(s1) = G_TRUNC %2(s64)
+    %4:_(s64), %5:_(s1) = G_SSUBE %0, %1, %3
+    %6:_(s64) = G_ANYEXT %5(s1)
+    $x10 = COPY %4(s64)
+    $x11 = COPY %6(s64)
+    PseudoRET implicit $x10, implicit $x11
+
+...
+---
+name:            ssube_i128
+body:             |
+  bb.1:
+    liveins: $x10, $x11, $x12, $x13, $x14
+
+    ; CHECK-LABEL: name: ssube_i128
+    ; CHECK: liveins: $x10, $x11, $x12, $x13, $x14
+    ; CHECK-NEXT: {{  $}}
+    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x10
+    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:_(s64) = COPY $x11
+    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:_(s64) = COPY $x12
+    ; CHECK-NEXT: [[COPY3:%[0-9]+]]:_(s64) = COPY $x13
+    ; CHECK-NEXT: [[COPY4:%[0-9]+]]:_(s64) = COPY $x14
+    ; CHECK-NEXT: [[DEF:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s64) = G_AND [[COPY4]], [[C]]
+    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s64) = G_AND [[DEF]], [[C1]]
+    ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s64) = G_ADD [[COPY2]], [[AND]]
+    ; CHECK-NEXT: [[ICMP:%[0-9]+]]:_(s64) = G_ICMP intpred(ult), [[ADD]](s64), [[AND]]
+    ; CHECK-NEXT: [[COPY5:%[0-9]+]]:_(s64) = COPY [[ADD]](s64)
+    ; CHECK-NEXT: [[ADD1:%[0-9]+]]:_(s64) = G_ADD [[COPY3]], [[AND1]]
+    ; CHECK-NEXT: [[ADD2:%[0-9]+]]:_(s64) = G_ADD [[ADD1]], [[ICMP]]
+    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:_(s64) = COPY [[ADD2]](s64)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s64) = G_SUB [[COPY]], [[COPY5]]
+    ; CHECK-NEXT: [[ICMP1:%[0-9]+]]:_(s64) = G_ICMP intpred(ult), [[COPY]](s64), [[COPY5]]
+    ; CHECK-NEXT: [[SUB1:%[0-9]+]]:_(s64) = G_SUB [[COPY1]], [[COPY6]]
+    ; CHECK-NEXT: [[SUB2:%[0-9]+]]:_(s64) = G_SUB [[SUB1]], [[ICMP1]]
+    ; CHECK-NEXT: [[XOR:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[COPY2]]
+    ; CHECK-NEXT: [[XOR1:%[0-9]+]]:_(s64) = G_XOR [[COPY1]], [[COPY3]]
+    ; CHECK-NEXT: [[XOR2:%[0-9]+]]:_(s64) = G_XOR [[COPY]], [[SUB]]
+    ; CHECK-NEXT: [[XOR3:%[0-9]+]]:_(s64) = G_XOR [[COPY1]], [[SUB2]]
+    ; CHECK-NEXT: [[AND2:%[0-9]+]]:_(s64) = G_AND [[XOR]], [[XOR2]]
+    ; CHECK-NEXT: [[AND3:%[0-9]+]]:_(s64) = G_AND [[XOR1]], [[XOR3]]
+    ; CHECK-NEXT: [[ICMP2:%[0-9]+]]:_(s64) = G_ICMP intpred(ult), [[AND2]](s64), [[C1]]
+    ; CHECK-NEXT: [[ICMP3:%[0-9]+]]:_(s64) = G_ICMP intpred(slt), [[AND3]](s64), [[C1]]
+    ; CHECK-NEXT: [[ICMP4:%[0-9]+]]:_(s64) = G_ICMP intpred(eq), [[AND3]](s64), [[C1]]
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[ICMP2]](s64)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[ICMP3]](s64)
+    ; CHECK-NEXT: [[SELECT:%[0-9]+]]:_(s32) = G_SELECT [[ICMP4]](s64), [[TRUNC]], [[TRUNC1]]
+    ; CHECK-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[SELECT]](s32)
+    ; CHECK-NEXT: $x10 = COPY [[SUB]](s64)
+    ; CHECK-NEXT: $x11 = COPY [[SUB2]](s64)
+    ; CHECK-NEXT: $x12 = COPY [[ANYEXT]](s64)
+    ; CHECK-NEXT: PseudoRET implicit $x10, implicit $x11, implicit $x12
+    %0:_(s64) = COPY $x10
+    %1:_(s64) = COPY $x11
+    %2:_(s128) = G_MERGE_VALUES %0(s64), %1(s64)
+    %3:_(s64) = COPY $x12
+    %4:_(s64) = COPY $x13
+    %5:_(s128) = G_MERGE_VALUES %3(s64), %4(s64)
+    %6:_(s64) = COPY $x14
+    %7:_(s1)  = G_TRUNC %6(s64)
+    %8:_(s128), %9:_(s1) = G_SSUBE %2, %5, %7
+    %10:_(s64), %11:_(s64) = G_UNMERGE_VALUES %8(s128)
+    %12:_(s64) = G_ANYEXT %9(s1)
+    $x10 = COPY %10(s64)
+    $x11 = COPY %11(s64)
+    $x12 = COPY %12(s64)
+    PseudoRET implicit $x10, implicit $x11, implicit $x12
+...