[GlobalISel][X86] G_ICMP support.

[igorb]

Summary

support G_ICMP for scalar types i8/i16/i64.

[guyblank]

lib/Target/X86/X86FastISel.cpp

183 ↗

(On Diff #98267)

perhaps commit this separately as an NFC?

lib/Target/X86/X86InstrInfo.h

67 ↗

(On Diff #98267)

wheter -> whether

lib/Target/X86/X86InstructionSelector.cpp

627

indentation

628

getSETFromCond asserts this already

lib/Target/X86/X86LegalizerInfo.cpp

93–99

unrelated to this patch, but can we have the common legalization info for 32/64 bit in one function?

[igorb]

• Fixes according to the review comments.

lib/Target/X86/X86LegalizerInfo.cpp

93–99

Yes, I am going to merge it in a few patches.

[guyblank]

LGTM

lib/Target/X86/X86InstructionSelector.cpp

private:
   bool selectFrameIndexOrGep(MachineInstr &I, MachineRegisterInfo &MRI,
                              MachineFunction &MF) const;
   bool selectConstant(MachineInstr &I, MachineRegisterInfo &MRI,
                       MachineFunction &MF) const;
   bool selectTrunc(MachineInstr &I, MachineRegisterInfo &MRI,
                    MachineFunction &MF) const;
   bool selectZext(MachineInstr &I, MachineRegisterInfo &MRI,
                   MachineFunction &MF) const;
+  bool selectCmp(MachineInstr &I, MachineRegisterInfo &MRI,
+                 MachineFunction &MF) const;
 
   const X86TargetMachine &TM;
   const X86Subtarget &STI;
   const X86InstrInfo &TII;
   const X86RegisterInfo &TRI;
   const X86RegisterBankInfo &RBI;
 
 #define GET_GLOBALISEL_PREDICATES_DECL
bool X86InstructionSelector::select(MachineInstr &I) const {
   if (selectFrameIndexOrGep(I, MRI, MF))
     return true;
   if (selectConstant(I, MRI, MF))
     return true;
   if (selectTrunc(I, MRI, MF))
     return true;
   if (selectZext(I, MRI, MF))
     return true;
+  if (selectCmp(I, MRI, MF))
+    return true;
 
   return false;
 }
 
 unsigned X86InstructionSelector::getFAddOp(LLT &Ty,
                                            const RegisterBank &RB) const {
 
   if (X86::VECRRegBankID != RB.getID())
if (SrcTy == LLT::scalar(1)) {
 
     I.eraseFromParent();
     return true;
   }
 
   return false;
 }
 
+bool X86InstructionSelector::selectCmp(MachineInstr &I,
+                                       MachineRegisterInfo &MRI,
+                                       MachineFunction &MF) const {
+  if (I.getOpcode() != TargetOpcode::G_ICMP)
+    return false;
+
+  X86::CondCode CC;
+  bool SwapArgs;
+  std::tie(CC, SwapArgs) = X86::getX86ConditionCode(
+      (CmpInst::Predicate)I.getOperand(1).getPredicate());
+  unsigned OpSet = X86::getSETFromCond(CC);
+
+  unsigned LHS = I.getOperand(2).getReg();
+  unsigned RHS = I.getOperand(3).getReg();
+
+  if (SwapArgs)
+    std::swap(LHS, RHS);
+
+  unsigned OpCmp;
+  LLT Ty = MRI.getType(LHS);
+
+  switch (Ty.getSizeInBits()) {
+  default:
+    return false;
+  case 8:
+    OpCmp = X86::CMP8rr;
+    break;
+  case 16:
+    OpCmp = X86::CMP16rr;
+    break;
+  case 32:
+    OpCmp = X86::CMP32rr;
+    break;
+  case 64:
+    OpCmp = X86::CMP64rr;
+    break;
+  }
+
+  MachineInstr &CmpInst =
+      *BuildMI(*I.getParent(), I, I.getDebugLoc(), TII.get(OpCmp))
+           .addReg(LHS)
+           .addReg(RHS);
+
+  MachineInstr &SetInst = *BuildMI(*I.getParent(), I, I.getDebugLoc(),
+                                   TII.get(OpSet), I.getOperand(0).getReg());
+
+  constrainSelectedInstRegOperands(CmpInst, TII, TRI, RBI);
+  constrainSelectedInstRegOperands(SetInst, TII, TRI, RBI);
+
+  I.eraseFromParent();
+  return true;
+}
+
 InstructionSelector *
 llvm::createX86InstructionSelector(const X86TargetMachine &TM,
                                    X86Subtarget &Subtarget,
                                    X86RegisterBankInfo &RBI) {
   return new X86InstructionSelector(TM, Subtarget, RBI);
 }

lib/Target/X86/X86LegalizerInfo.cpp

void X86LegalizerInfo::setLegalizerInfo32bit() {
 
   // Extensions
   setAction({G_ZEXT, s32}, Legal);
   setAction({G_SEXT, s32}, Legal);
 
   for (auto Ty : {s1, s8, s16}) {
     setAction({G_ZEXT, 1, Ty}, Legal);
     setAction({G_SEXT, 1, Ty}, Legal);
   }
+
+  // Comparison
+  setAction({G_ICMP, s1}, Legal);
+
+  for (auto Ty : {s8, s16, s32, p0})
+    setAction({G_ICMP, 1, Ty}, Legal);
 }
 
 void X86LegalizerInfo::setLegalizerInfo64bit() {
 
   if (!Subtarget.is64Bit())
     return;
 
   const LLT p0 = LLT::pointer(0, TM.getPointerSize() * 8);
for (auto Ty : {s32, s64}) {
     setAction({G_ZEXT, Ty}, Legal);
     setAction({G_SEXT, Ty}, Legal);
   }
 
   for (auto Ty : {s1, s8, s16, s32}) {
     setAction({G_ZEXT, 1, Ty}, Legal);
     setAction({G_SEXT, 1, Ty}, Legal);
   }
+
+  // Comparison
+  setAction({G_ICMP, s1}, Legal);
+
+  for (auto Ty : {s8, s16, s32, s64, p0})
+    setAction({G_ICMP, 1, Ty}, Legal);
 }
 
 void X86LegalizerInfo::setLegalizerInfoSSE1() {
   if (!Subtarget.hasSSE1())
     return;
 
   const LLT s32 = LLT::scalar(32);
   const LLT v4s32 = LLT::vector(4, 32);

test/CodeGen/X86/GlobalISel/cmp.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=x86_64-linux-gnu    -global-isel < %s -o - | FileCheck %s --check-prefix=ALL
+
+define i32 @test_icmp_eq_i8(i8 %a, i8 %b) {
+; ALL-LABEL: test_icmp_eq_i8:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpb %sil, %dil
+; ALL-NEXT:    sete %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp eq i8 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_eq_i16(i16 %a, i16 %b) {
+; ALL-LABEL: test_icmp_eq_i16:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpw %si, %di
+; ALL-NEXT:    sete %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp eq i16 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_eq_i64(i64 %a, i64 %b) {
+; ALL-LABEL: test_icmp_eq_i64:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpq %rsi, %rdi
+; ALL-NEXT:    sete %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp eq i64 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_eq_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_eq_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    sete %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp eq i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_ne_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_ne_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setne %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp ne i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_ugt_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_ugt_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    seta %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp ugt i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_uge_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_uge_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setae %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp uge i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_ult_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_ult_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setb %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp ult i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_ule_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_ule_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setbe %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp ule i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_sgt_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_sgt_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setg %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp sgt i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_sge_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_sge_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setge %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp sge i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_slt_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_slt_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setl %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp slt i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+
+define i32 @test_icmp_sle_i32(i32 %a, i32 %b) {
+; ALL-LABEL: test_icmp_sle_i32:
+; ALL:       # BB#0:
+; ALL-NEXT:    cmpl %esi, %edi
+; ALL-NEXT:    setle %al
+; ALL-NEXT:    andl $1, %eax
+; ALL-NEXT:    retq
+  %r = icmp sle i32 %a, %b
+  %res =  zext i1 %r to i32
+  ret i32 %res
+}
+

test/CodeGen/X86/GlobalISel/legalize-cmp.mir

+# RUN: llc -mtriple=x86_64-linux-gnu -global-isel -run-pass=legalizer %s -o - | FileCheck %s
+
+--- |
+  define i32 @test_cmp_i8(i8 %a, i8 %b) {
+    %r = icmp ult i8 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_cmp_i16(i16 %a, i16 %b) {
+    %r = icmp ult i16 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_cmp_i32(i32 %a, i32 %b) {
+    %r = icmp ult i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_cmp_i64(i64 %a, i64 %b) {
+    %r = icmp ult i64 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_cmp_p0(i32* %a, i32* %b) {
+    %r = icmp ult i32* %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+...
+---
+name:            test_cmp_i8
+# CHECK-LABEL: name:  test_cmp_i8
+alignment:       4
+legalized:       false
+regBankSelected: false
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+# CHECK:          %0(s8) = COPY %edi
+# CHECK-NEXT:     %1(s8) = COPY %esi
+# CHECK-NEXT:     %2(s1) = G_ICMP intpred(ult), %0(s8), %1
+# CHECK-NEXT:     %3(s32) = G_ZEXT %2(s1)
+# CHECK-NEXT:     %eax = COPY %3(s32)
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s8) = COPY %edi
+    %1(s8) = COPY %esi
+    %2(s1) = G_ICMP intpred(ult), %0(s8), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_cmp_i16
+# CHECK-LABEL: name:  test_cmp_i16
+alignment:       4
+legalized:       false
+regBankSelected: false
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+# CHECK:          %0(s16) = COPY %edi
+# CHECK-NEXT:     %1(s16) = COPY %esi
+# CHECK-NEXT:     %2(s1) = G_ICMP intpred(ult), %0(s16), %1
+# CHECK-NEXT:     %3(s32) = G_ZEXT %2(s1)
+# CHECK-NEXT:     %eax = COPY %3(s32)
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s16) = COPY %edi
+    %1(s16) = COPY %esi
+    %2(s1) = G_ICMP intpred(ult), %0(s16), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_cmp_i32
+# CHECK-LABEL: name:  test_cmp_i32
+alignment:       4
+legalized:       false
+regBankSelected: false
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+# CHECK:          %0(s32) = COPY %edi
+# CHECK-NEXT:     %1(s32) = COPY %esi
+# CHECK-NEXT:     %2(s1) = G_ICMP intpred(ult), %0(s32), %1
+# CHECK-NEXT:     %3(s32) = G_ZEXT %2(s1)
+# CHECK-NEXT:     %eax = COPY %3(s32)
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(ult), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_cmp_i64
+# CHECK-LABEL: name:  test_cmp_i64
+alignment:       4
+legalized:       false
+regBankSelected: false
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+# CHECK:          %0(s64) = COPY %rdi
+# CHECK-NEXT:     %1(s64) = COPY %rsi
+# CHECK-NEXT:     %2(s1) = G_ICMP intpred(ult), %0(s64), %1
+# CHECK-NEXT:     %3(s32) = G_ZEXT %2(s1)
+# CHECK-NEXT:     %eax = COPY %3(s32)
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %rdi, %rsi
+
+    %0(s64) = COPY %rdi
+    %1(s64) = COPY %rsi
+    %2(s1) = G_ICMP intpred(ult), %0(s64), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_cmp_p0
+# CHECK-LABEL: name:  test_cmp_p0
+alignment:       4
+legalized:       false
+regBankSelected: false
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+  - { id: 3, class: _ }
+# CHECK:          %0(p0) = COPY %rdi
+# CHECK-NEXT:     %1(p0) = COPY %rsi
+# CHECK-NEXT:     %2(s1) = G_ICMP intpred(ult), %0(p0), %1
+# CHECK-NEXT:     %3(s32) = G_ZEXT %2(s1)
+# CHECK-NEXT:     %eax = COPY %3(s32)
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %rdi, %rsi
+
+    %0(p0) = COPY %rdi
+    %1(p0) = COPY %rsi
+    %2(s1) = G_ICMP intpred(ult), %0(p0), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...

test/CodeGen/X86/GlobalISel/regbankselect-X86_64.mir

 # RUN: llc -mtriple=x86_64-linux-gnu -global-isel                       -run-pass=regbankselect %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=FAST
 # RUN: llc -mtriple=x86_64-linux-gnu -global-isel -regbankselect-greedy -run-pass=regbankselect %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=GREEDY
 
 --- |
-  ; ModuleID = 'tmp.ll'
-  source_filename = "tmp.ll"
-  target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-  target triple = "x86_64--linux-gnu"
-
   define i8 @test_add_i8(i8 %arg1, i8 %arg2) {
     %ret = add i8 %arg1, %arg2
     ret i8 %ret
   }
 
   define i16 @test_add_i16(i16 %arg1, i16 %arg2) {
     %ret = add i16 %arg1, %arg2
     ret i16 %ret
--- |
   }
 
   define void @test_gep() {
     %p1 = getelementptr i32, i32* undef, i32 5
     %p2 = getelementptr i32, i32* undef, i64 5
     ret void
   }
 
+  define i1 @test_icmp_eq_i8(i8 %a, i8 %b) {
+    %r = icmp eq i8 %a, %b
+    ret i1 %r
+  }
+
+  define i1 @test_icmp_eq_i16(i16 %a, i16 %b) {
+    %r = icmp eq i16 %a, %b
+    ret i1 %r
+  }
+
+  define i1 @test_icmp_eq_i32(i32 %a, i32 %b) {
+    %r = icmp eq i32 %a, %b
+    ret i1 %r
+  }
+
+  define i1 @test_icmp_eq_i64(i64 %a, i64 %b) {
+    %r = icmp eq i64 %a, %b
+    ret i1 %r
+  }
+
 ...
 ---
 name:            test_add_i8
 alignment:       4
 legalized:       true
 regBankSelected: false
 selected:        false
 tracksRegLiveness: true
bb.0 (%ir-block.0):
     %0(p0) = IMPLICIT_DEF
     %1(s32) = G_CONSTANT i32 20
     %2(p0) = G_GEP %0, %1(s32)
     %3(s64) = G_CONSTANT i64 20
     %4(p0) = G_GEP %0, %3(s64)
     RET 0
 
 ...
+---
+name:            test_icmp_eq_i8
+# CHECK-LABEL: name:  test_icmp_eq_i8
+alignment:       4
+legalized:       true
+regBankSelected: false
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gpr }
+# CHECK-NEXT:   - { id: 1, class: gpr }
+# CHECK-NEXT:   - { id: 2, class: gpr }
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s8) = COPY %edi
+    %1(s8) = COPY %esi
+    %2(s1) = G_ICMP intpred(eq), %0(s8), %1
+    %al = COPY %2(s1)
+    RET 0, implicit %al
+
+...
+---
+name:            test_icmp_eq_i16
+# CHECK-LABEL: name:  test_icmp_eq_i16
+alignment:       4
+legalized:       true
+regBankSelected: false
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gpr }
+# CHECK-NEXT:   - { id: 1, class: gpr }
+# CHECK-NEXT:   - { id: 2, class: gpr }
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s16) = COPY %edi
+    %1(s16) = COPY %esi
+    %2(s1) = G_ICMP intpred(eq), %0(s16), %1
+    %al = COPY %2(s1)
+    RET 0, implicit %al
+
+...
+---
+name:            test_icmp_eq_i32
+# CHECK-LABEL: name:  test_icmp_eq_i32
+alignment:       4
+legalized:       true
+regBankSelected: false
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gpr }
+# CHECK-NEXT:   - { id: 1, class: gpr }
+# CHECK-NEXT:   - { id: 2, class: gpr }
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(eq), %0(s32), %1
+    %al = COPY %2(s1)
+    RET 0, implicit %al
+
+...
+---
+name:            test_icmp_eq_i64
+# CHECK-LABEL: name:  test_icmp_eq_i64
+alignment:       4
+legalized:       true
+regBankSelected: false
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gpr }
+# CHECK-NEXT:   - { id: 1, class: gpr }
+# CHECK-NEXT:   - { id: 2, class: gpr }
+registers:
+  - { id: 0, class: _ }
+  - { id: 1, class: _ }
+  - { id: 2, class: _ }
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %rdi, %rsi
+
+    %0(s64) = COPY %rdi
+    %1(s64) = COPY %rsi
+    %2(s1) = G_ICMP intpred(eq), %0(s64), %1
+    %al = COPY %2(s1)
+    RET 0, implicit %al
+
+...

test/CodeGen/X86/GlobalISel/select-cmp.mir

+# RUN: llc -mtriple=x86_64-linux-gnu -global-isel -run-pass=instruction-select %s -o - | FileCheck %s --check-prefix=CHECK
+
+--- |
+  define i32 @test_icmp_eq_i8(i8 %a, i8 %b) {
+    %r = icmp eq i8 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_eq_i16(i16 %a, i16 %b) {
+    %r = icmp eq i16 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_eq_i64(i64 %a, i64 %b) {
+    %r = icmp eq i64 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_eq_i32(i32 %a, i32 %b) {
+    %r = icmp eq i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_ne_i32(i32 %a, i32 %b) {
+    %r = icmp ne i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_ugt_i32(i32 %a, i32 %b) {
+    %r = icmp ugt i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_uge_i32(i32 %a, i32 %b) {
+    %r = icmp uge i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_ult_i32(i32 %a, i32 %b) {
+    %r = icmp ult i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_ule_i32(i32 %a, i32 %b) {
+    %r = icmp ule i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_sgt_i32(i32 %a, i32 %b) {
+    %r = icmp sgt i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_sge_i32(i32 %a, i32 %b) {
+    %r = icmp sge i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_slt_i32(i32 %a, i32 %b) {
+    %r = icmp slt i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+  define i32 @test_icmp_sle_i32(i32 %a, i32 %b) {
+    %r = icmp sle i32 %a, %b
+    %res = zext i1 %r to i32
+    ret i32 %res
+  }
+
+...
+---
+name:            test_icmp_eq_i8
+# CHECK-LABEL: name:  test_icmp_eq_i8
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr8 }
+# CHECK-NEXT:   - { id: 1, class: gr8 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %dil
+# CHECK-NEXT:     %1 = COPY %sil
+# CHECK-NEXT:     CMP8rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s8) = COPY %edi
+    %1(s8) = COPY %esi
+    %2(s1) = G_ICMP intpred(eq), %0(s8), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_eq_i16
+# CHECK-LABEL: name:  test_icmp_eq_i16
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr16 }
+# CHECK-NEXT:   - { id: 1, class: gr16 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %di
+# CHECK-NEXT:     %1 = COPY %si
+# CHECK-NEXT:     CMP16rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s16) = COPY %edi
+    %1(s16) = COPY %esi
+    %2(s1) = G_ICMP intpred(eq), %0(s16), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_eq_i64
+# CHECK-LABEL: name:  test_icmp_eq_i64
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr64 }
+# CHECK-NEXT:   - { id: 1, class: gr64 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %rdi
+# CHECK-NEXT:     %1 = COPY %rsi
+# CHECK-NEXT:     CMP64rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %rdi, %rsi
+
+    %0(s64) = COPY %rdi
+    %1(s64) = COPY %rsi
+    %2(s1) = G_ICMP intpred(eq), %0(s64), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_eq_i32
+# CHECK-LABEL: name:  test_icmp_eq_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(eq), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_ne_i32
+# CHECK-LABEL: name:  test_icmp_ne_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETNEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(ne), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_ugt_i32
+# CHECK-LABEL: name:  test_icmp_ugt_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETAr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(ugt), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_uge_i32
+# CHECK-LABEL: name:  test_icmp_uge_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETAEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(uge), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_ult_i32
+# CHECK-LABEL: name:  test_icmp_ult_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETBr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(ult), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_ule_i32
+# CHECK-LABEL: name:  test_icmp_ule_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETBEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(ule), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_sgt_i32
+# CHECK-LABEL: name:  test_icmp_sgt_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETGr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(sgt), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_sge_i32
+# CHECK-LABEL: name:  test_icmp_sge_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETGEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(sge), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_slt_i32
+# CHECK-LABEL: name:  test_icmp_slt_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETLr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(slt), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...
+---
+name:            test_icmp_sle_i32
+# CHECK-LABEL: name:  test_icmp_sle_i32
+alignment:       4
+legalized:       true
+regBankSelected: true
+# CHECK:      registers:
+# CHECK-NEXT:   - { id: 0, class: gr32 }
+# CHECK-NEXT:   - { id: 1, class: gr32 }
+# CHECK-NEXT:   - { id: 2, class: gr8 }
+# CHECK-NEXT:   - { id: 3, class: gr32 }
+# CHECK-NEXT:   - { id: 4, class: gr32 }
+registers:
+  - { id: 0, class: gpr }
+  - { id: 1, class: gpr }
+  - { id: 2, class: gpr }
+  - { id: 3, class: gpr }
+# CHECK:          %0 = COPY %edi
+# CHECK-NEXT:     %1 = COPY %esi
+# CHECK-NEXT:     CMP32rr %0, %1, implicit-def %eflags
+# CHECK-NEXT:     %2 = SETLEr implicit %eflags
+# CHECK-NEXT:     %4 = SUBREG_TO_REG 0, %2, 1
+# CHECK-NEXT:     %3 = AND32ri8 %4, 1, implicit-def %eflags
+# CHECK-NEXT:     %eax = COPY %3
+# CHECK-NEXT:     RET 0, implicit %eax
+body:             |
+  bb.1 (%ir-block.0):
+    liveins: %edi, %esi
+
+    %0(s32) = COPY %edi
+    %1(s32) = COPY %esi
+    %2(s1) = G_ICMP intpred(sle), %0(s32), %1
+    %3(s32) = G_ZEXT %2(s1)
+    %eax = COPY %3(s32)
+    RET 0, implicit %eax
+
+...