[X86] Add stack folding MIR test for ADCX/ADOX.

We currently have no way to isel ADOX and I plan to remove isel patterns for ADCX. This test will ensure we still have stack folding support for these instructions if we need them in the future.

llvm-svn: 341743

1 files changed, 269 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/stack-folding-adx.mir b/llvm/test/CodeGen/X86/stack-folding-adx.mir
new file mode 100644
index 00000000000..b51d48095c2
--- /dev/null
+++ b/llvm/test/CodeGen/X86/stack-folding-adx.mir
@@ -0,0 +1,269 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -o - -mtriple=x86_64-- -run-pass=greedy %s | FileCheck %s
+# Tests for stack folding ADCX and ADOX. The ADOX tests were manually constructed by modifying ADCX tests to use OF instead of CF.
+--- |
+  ; Function Attrs: nounwind
+  define i8 @stack_fold_adcx32(i8 %a0, i32 %a1, i32 %a2, i8* %a3) #0 {
+    %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+    %2 = call { i8, i32 } @llvm.x86.addcarryx.u32(i8 %a0, i32 %a1, i32 %a2)
+    %3 = extractvalue { i8, i32 } %2, 1
+    %4 = bitcast i8* %a3 to i32*
+    store i32 %3, i32* %4, align 1
+    %5 = extractvalue { i8, i32 } %2, 0
+    ret i8 %5
+  }
+
+  ; Function Attrs: nounwind
+  define i8 @stack_fold_adcx64(i8 %a0, i64 %a1, i64 %a2, i8* %a3) #0 {
+    %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+    %2 = call { i8, i64 } @llvm.x86.addcarryx.u64(i8 %a0, i64 %a1, i64 %a2)
+    %3 = extractvalue { i8, i64 } %2, 1
+    %4 = bitcast i8* %a3 to i64*
+    store i64 %3, i64* %4, align 1
+    %5 = extractvalue { i8, i64 } %2, 0
+    ret i8 %5
+  }
+
+  define i8 @stack_fold_adox32(i8 %a0, i32 %a1, i32 %a2, i8* %a3) #0 {
+    %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+    %2 = call { i8, i32 } @llvm.x86.addcarryx.u32(i8 %a0, i32 %a1, i32 %a2)
+    %3 = extractvalue { i8, i32 } %2, 1
+    %4 = bitcast i8* %a3 to i32*
+    store i32 %3, i32* %4, align 1
+    %5 = extractvalue { i8, i32 } %2, 0
+    ret i8 %5
+  }
+
+  ; Function Attrs: nounwind
+  define i8 @stack_fold_adox64(i8 %a0, i64 %a1, i64 %a2, i8* %a3) #0 {
+    %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
+    %2 = call { i8, i64 } @llvm.x86.addcarryx.u64(i8 %a0, i64 %a1, i64 %a2)
+    %3 = extractvalue { i8, i64 } %2, 1
+    %4 = bitcast i8* %a3 to i64*
+    store i64 %3, i64* %4, align 1
+    %5 = extractvalue { i8, i64 } %2, 0
+    ret i8 %5
+  }
+
+  ; Function Attrs: nounwind readnone
+  declare { i8, i32 } @llvm.x86.addcarryx.u32(i8, i32, i32) #1
+
+  ; Function Attrs: nounwind readnone
+  declare { i8, i64 } @llvm.x86.addcarryx.u64(i8, i64, i64) #1
+
+  ; Function Attrs: nounwind
+  declare void @llvm.stackprotector(i8*, i8**) #2
+
+  attributes #0 = { nounwind "target-features"="+adx" }
+  attributes #1 = { nounwind readnone "target-features"="+adx" }
+  attributes #2 = { nounwind }
+
+...
+---
+name:            stack_fold_adcx32
+alignment:       4
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: gr32 }
+  - { id: 1, class: gr32 }
+  - { id: 2, class: gr32 }
+  - { id: 3, class: gr64 }
+  - { id: 4, class: fr64 }
+  - { id: 5, class: gr8 }
+  - { id: 6, class: gr8 }
+  - { id: 7, class: gr32 }
+  - { id: 8, class: gr8 }
+liveins:
+  - { reg: '$edi', virtual-reg: '%0' }
+  - { reg: '$esi', virtual-reg: '%1' }
+  - { reg: '$edx', virtual-reg: '%2' }
+  - { reg: '$rcx', virtual-reg: '%3' }
+body:             |
+  bb.0 (%ir-block.0):
+    liveins: $edi, $esi, $edx, $rcx
+
+    ; CHECK-LABEL: name: stack_fold_adcx32
+    ; CHECK: liveins: $edi, $esi, $edx, $rcx
+    ; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, $rcx :: (store 8 into %stack.0)
+    ; CHECK: MOV32mr %stack.1, 1, $noreg, 0, $noreg, $edx :: (store 4 into %stack.1)
+    ; CHECK: MOV32mr %stack.2, 1, $noreg, 0, $noreg, $esi :: (store 4 into %stack.2)
+    ; CHECK: MOV32mr %stack.3, 1, $noreg, 0, $noreg, $edi :: (store 4 into %stack.3)
+    ; CHECK: INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    ; CHECK: [[MOV32rm:%[0-9]+]]:gr32 = MOV32rm %stack.3, 1, $noreg, 0, $noreg :: (load 4 from %stack.3)
+    ; CHECK: dead [[MOV32rm]].sub_8bit:gr32 = ADD8ri [[MOV32rm]].sub_8bit, -1, implicit-def $eflags
+    ; CHECK: [[MOV32rm1:%[0-9]+]]:gr32 = MOV32rm %stack.2, 1, $noreg, 0, $noreg :: (load 4 from %stack.2)
+    ; CHECK: [[ADCX32rm:%[0-9]+]]:gr32 = ADCX32rm [[ADCX32rm]], %stack.1, 1, $noreg, 0, $noreg, implicit-def $eflags, implicit killed $eflags :: (load 4 from %stack.1)
+    ; CHECK: [[SETBr:%[0-9]+]]:gr8 = SETBr implicit killed $eflags
+    ; CHECK: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
+    ; CHECK: MOV32mr [[MOV64rm]], 1, $noreg, 0, $noreg, [[ADCX32rm]] :: (store 4 into %ir.4, align 1)
+    ; CHECK: $al = COPY [[SETBr]]
+    ; CHECK: RET 0, $al
+    %3:gr64 = COPY $rcx
+    %2:gr32 = COPY $edx
+    %7:gr32 = COPY $esi
+    %0:gr32 = COPY $edi
+    INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    dead %0.sub_8bit:gr32 = ADD8ri %0.sub_8bit, -1, implicit-def $eflags
+    %7:gr32 = ADCX32rr %7, %2, implicit-def $eflags, implicit killed $eflags
+    %8:gr8 = SETBr implicit killed $eflags
+    MOV32mr %3, 1, $noreg, 0, $noreg, %7 :: (store 4 into %ir.4, align 1)
+    $al = COPY %8
+    RET 0, killed $al
+
+...
+---
+name:            stack_fold_adcx64
+alignment:       4
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: gr32 }
+  - { id: 1, class: gr64 }
+  - { id: 2, class: gr64 }
+  - { id: 3, class: gr64 }
+  - { id: 4, class: fr64 }
+  - { id: 5, class: gr8 }
+  - { id: 6, class: gr8 }
+  - { id: 7, class: gr64 }
+  - { id: 8, class: gr8 }
+liveins:
+  - { reg: '$edi', virtual-reg: '%0' }
+  - { reg: '$rsi', virtual-reg: '%1' }
+  - { reg: '$rdx', virtual-reg: '%2' }
+  - { reg: '$rcx', virtual-reg: '%3' }
+body:             |
+  bb.0 (%ir-block.0):
+    liveins: $edi, $rsi, $rdx, $rcx
+
+    ; CHECK-LABEL: name: stack_fold_adcx64
+    ; CHECK: liveins: $edi, $rsi, $rdx, $rcx
+    ; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, $rcx :: (store 8 into %stack.0)
+    ; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, $rdx :: (store 8 into %stack.1)
+    ; CHECK: MOV64mr %stack.2, 1, $noreg, 0, $noreg, $rsi :: (store 8 into %stack.2)
+    ; CHECK: MOV32mr %stack.3, 1, $noreg, 0, $noreg, $edi :: (store 4 into %stack.3)
+    ; CHECK: INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    ; CHECK: [[MOV32rm:%[0-9]+]]:gr32 = MOV32rm %stack.3, 1, $noreg, 0, $noreg :: (load 4 from %stack.3)
+    ; CHECK: dead [[MOV32rm]].sub_8bit:gr32 = ADD8ri [[MOV32rm]].sub_8bit, -1, implicit-def $eflags
+    ; CHECK: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm %stack.2, 1, $noreg, 0, $noreg :: (load 8 from %stack.2)
+    ; CHECK: [[ADCX64rm:%[0-9]+]]:gr64 = ADCX64rm [[ADCX64rm]], %stack.1, 1, $noreg, 0, $noreg, implicit-def $eflags, implicit killed $eflags :: (load 8 from %stack.1)
+    ; CHECK: [[SETBr:%[0-9]+]]:gr8 = SETBr implicit killed $eflags
+    ; CHECK: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
+    ; CHECK: MOV64mr [[MOV64rm]], 1, $noreg, 0, $noreg, [[ADCX64rm]] :: (store 8 into %ir.4, align 1)
+    ; CHECK: $al = COPY [[SETBr]]
+    ; CHECK: RET 0, $al
+    %3:gr64 = COPY $rcx
+    %2:gr64 = COPY $rdx
+    %7:gr64 = COPY $rsi
+    %0:gr32 = COPY $edi
+    INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    dead %0.sub_8bit:gr32 = ADD8ri %0.sub_8bit, -1, implicit-def $eflags
+    %7:gr64 = ADCX64rr %7, %2, implicit-def $eflags, implicit killed $eflags
+    %8:gr8 = SETBr implicit killed $eflags
+    MOV64mr %3, 1, $noreg, 0, $noreg, %7 :: (store 8 into %ir.4, align 1)
+    $al = COPY %8
+    RET 0, killed $al
+
+...
+---
+name:            stack_fold_adox32
+alignment:       4
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: gr32 }
+  - { id: 1, class: gr32 }
+  - { id: 2, class: gr32 }
+  - { id: 3, class: gr64 }
+  - { id: 4, class: fr64 }
+  - { id: 5, class: gr8 }
+  - { id: 6, class: gr8 }
+  - { id: 7, class: gr32 }
+  - { id: 8, class: gr8 }
+liveins:
+  - { reg: '$edi', virtual-reg: '%0' }
+  - { reg: '$esi', virtual-reg: '%1' }
+  - { reg: '$edx', virtual-reg: '%2' }
+  - { reg: '$rcx', virtual-reg: '%3' }
+body:             |
+  bb.0 (%ir-block.0):
+    liveins: $edi, $esi, $edx, $rcx
+
+    ; CHECK-LABEL: name: stack_fold_adox32
+    ; CHECK: liveins: $edi, $esi, $edx, $rcx
+    ; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, $rcx :: (store 8 into %stack.0)
+    ; CHECK: MOV32mr %stack.1, 1, $noreg, 0, $noreg, $edx :: (store 4 into %stack.1)
+    ; CHECK: MOV32mr %stack.2, 1, $noreg, 0, $noreg, $esi :: (store 4 into %stack.2)
+    ; CHECK: MOV32mr %stack.3, 1, $noreg, 0, $noreg, $edi :: (store 4 into %stack.3)
+    ; CHECK: INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    ; CHECK: [[MOV32rm:%[0-9]+]]:gr32 = MOV32rm %stack.3, 1, $noreg, 0, $noreg :: (load 4 from %stack.3)
+    ; CHECK: dead [[MOV32rm]].sub_8bit:gr32 = ADD8ri [[MOV32rm]].sub_8bit, 127, implicit-def $eflags
+    ; CHECK: [[MOV32rm1:%[0-9]+]]:gr32 = MOV32rm %stack.2, 1, $noreg, 0, $noreg :: (load 4 from %stack.2)
+    ; CHECK: [[ADOX32rm:%[0-9]+]]:gr32 = ADOX32rm [[ADOX32rm]], %stack.1, 1, $noreg, 0, $noreg, implicit-def $eflags, implicit killed $eflags :: (load 4 from %stack.1)
+    ; CHECK: [[SETOr:%[0-9]+]]:gr8 = SETOr implicit killed $eflags
+    ; CHECK: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
+    ; CHECK: MOV32mr [[MOV64rm]], 1, $noreg, 0, $noreg, [[ADOX32rm]] :: (store 4 into %ir.4, align 1)
+    ; CHECK: $al = COPY [[SETOr]]
+    ; CHECK: RET 0, $al
+    %3:gr64 = COPY $rcx
+    %2:gr32 = COPY $edx
+    %7:gr32 = COPY $esi
+    %0:gr32 = COPY $edi
+    INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    dead %0.sub_8bit:gr32 = ADD8ri %0.sub_8bit, 127, implicit-def $eflags
+    %7:gr32 = ADOX32rr %7, %2, implicit-def $eflags, implicit killed $eflags
+    %8:gr8 = SETOr implicit killed $eflags
+    MOV32mr %3, 1, $noreg, 0, $noreg, %7 :: (store 4 into %ir.4, align 1)
+    $al = COPY %8
+    RET 0, killed $al
+
+...
+---
+name:            stack_fold_adox64
+alignment:       4
+tracksRegLiveness: true
+registers:
+  - { id: 0, class: gr32 }
+  - { id: 1, class: gr64 }
+  - { id: 2, class: gr64 }
+  - { id: 3, class: gr64 }
+  - { id: 4, class: fr64 }
+  - { id: 5, class: gr8 }
+  - { id: 6, class: gr8 }
+  - { id: 7, class: gr64 }
+  - { id: 8, class: gr8 }
+liveins:
+  - { reg: '$edi', virtual-reg: '%0' }
+  - { reg: '$rsi', virtual-reg: '%1' }
+  - { reg: '$rdx', virtual-reg: '%2' }
+  - { reg: '$rcx', virtual-reg: '%3' }
+body:             |
+  bb.0 (%ir-block.0):
+    liveins: $edi, $rsi, $rdx, $rcx
+
+    ; CHECK-LABEL: name: stack_fold_adox64
+    ; CHECK: liveins: $edi, $rsi, $rdx, $rcx
+    ; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, $rcx :: (store 8 into %stack.0)
+    ; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, $rdx :: (store 8 into %stack.1)
+    ; CHECK: MOV64mr %stack.2, 1, $noreg, 0, $noreg, $rsi :: (store 8 into %stack.2)
+    ; CHECK: MOV32mr %stack.3, 1, $noreg, 0, $noreg, $edi :: (store 4 into %stack.3)
+    ; CHECK: INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    ; CHECK: [[MOV32rm:%[0-9]+]]:gr32 = MOV32rm %stack.3, 1, $noreg, 0, $noreg :: (load 4 from %stack.3)
+    ; CHECK: dead [[MOV32rm]].sub_8bit:gr32 = ADD8ri [[MOV32rm]].sub_8bit, 127, implicit-def $eflags
+    ; CHECK: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm %stack.2, 1, $noreg, 0, $noreg :: (load 8 from %stack.2)
+    ; CHECK: [[ADOX64rm:%[0-9]+]]:gr64 = ADOX64rm [[ADOX64rm]], %stack.1, 1, $noreg, 0, $noreg, implicit-def $eflags, implicit killed $eflags :: (load 8 from %stack.1)
+    ; CHECK: [[SETOr:%[0-9]+]]:gr8 = SETOr implicit killed $eflags
+    ; CHECK: [[MOV64rm:%[0-9]+]]:gr64 = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
+    ; CHECK: MOV64mr [[MOV64rm]], 1, $noreg, 0, $noreg, [[ADOX64rm]] :: (store 8 into %ir.4, align 1)
+    ; CHECK: $al = COPY [[SETOr]]
+    ; CHECK: RET 0, $al
+    %3:gr64 = COPY $rcx
+    %2:gr64 = COPY $rdx
+    %7:gr64 = COPY $rsi
+    %0:gr32 = COPY $edi
+    INLINEASM &nop, 1, 3145738, def dead %4, 12, implicit-def dead early-clobber $rax, 12, implicit-def dead early-clobber $rbx, 12, implicit-def dead early-clobber $rcx, 12, implicit-def dead early-clobber $rdx, 12, implicit-def dead early-clobber $rsi, 12, implicit-def dead early-clobber $rdi, 12, implicit-def dead early-clobber $rbp, 12, implicit-def dead early-clobber $r8, 12, implicit-def dead early-clobber $r9, 12, implicit-def dead early-clobber $r10, 12, implicit-def dead early-clobber $r11, 12, implicit-def dead early-clobber $r12, 12, implicit-def dead early-clobber $r13, 12, implicit-def dead early-clobber $r14, 12, implicit-def dead early-clobber $r15
+    dead %0.sub_8bit:gr32 = ADD8ri %0.sub_8bit, 127, implicit-def $eflags
+    %7:gr64 = ADOX64rr %7, %2, implicit-def $eflags, implicit killed $eflags
+    %8:gr8 = SETOr implicit killed $eflags
+    MOV64mr %3, 1, $noreg, 0, $noreg, %7 :: (store 8 into %ir.4, align 1)
+    $al = COPY %8
+    RET 0, killed $al
+
+...