[X86][Sched] Add InstRW for CLC on Intel after SNB.

[courbet]

Summary

After SNB, Intel CPUs can rename CF independently of other EFLAGS,
so the renamer can zero it for free. Note that STC still consumes resources.

To reproduce: $ llvm-exegesis -mode=uops -opcode-name=CLC

On SNB:

---
key:
  opcode_name:     CLC
  mode:            uops
  config:          ''
cpu_name:        sandybridge
llvm_triple:     x86_64-unknown-linux-gnu
num_repetitions: 10000
measurements:
  - { key: '3', value: 0.0014, debug_string: SBPort0 }
  - { key: '4', value: 0.0013, debug_string: SBPort1 }
  - { key: '5', value: 0.0003, debug_string: SBPort4 }
  - { key: '6', value: 0.0029, debug_string: SBPort5 }
  - { key: '10', value: 0.0003, debug_string: SBPort23 }
error:           ''
info:            'instruction is serial, repeating a random one.
Snippet:
CLC
'
...

On HSW:

---
key:
  opcode_name:     CLC
  mode:            uops
  config:          ''
cpu_name:        haswell
llvm_triple:     x86_64-unknown-linux-gnu
num_repetitions: 10000
measurements:
  - { key: '3', value: 0.001, debug_string: HWPort0 }
  - { key: '4', value: 0.0009, debug_string: HWPort1 }
  - { key: '5', value: 0.0004, debug_string: HWPort2 }
  - { key: '6', value: 0.0006, debug_string: HWPort3 }
  - { key: '7', value: 0.0002, debug_string: HWPort4 }
  - { key: '8', value: 0.0012, debug_string: HWPort5 }
  - { key: '9', value: 0.0022, debug_string: HWPort6 }
  - { key: '10', value: 0.0001, debug_string: HWPort7 }
error:           ''
info:            'instruction is serial, repeating a random one.
Snippet:
CLC
'
...

[RKSimon]

Tests? Please can you add CLC to the relevant llvm-mca resource test files (or all of them if you wish - it's nice to keep those files the same for each CPU):

llvm\test\tools\llvm-mca\X86\SandyBridge\resources-x86_64.s
llvm\test\tools\llvm-mca\X86\Haswell\resources-x86_64.s
etc.

[courbet]

Fix tests and add tests for llvm-mca

[courbet]

Thanks. Now I'll guess I'll go fix the WriteZero definition, that has one uop and latency 1 because that's the default :(

[RKSimon]

LGTM - please commit this and then rebase D47377

llvm/trunk/lib/Target/X86/X86SchedBroadwell.td

 
 def BWWriteResGroup202 : SchedWriteRes<[BWPort0,BWPort1,BWPort4,BWPort5,BWPort6,BWPort237,BWPort06,BWPort0156]> {
   let Latency = 115;
   let NumMicroOps = 100;
   let ResourceCycles = [9,9,11,8,1,11,21,30];
 }
 def: InstRW<[BWWriteResGroup202], (instrs FSTENVm)>;
 
+def: InstRW<[WriteZero], (instrs CLC)>;
+
 } // SchedModel
 

llvm/trunk/lib/Target/X86/X86SchedHaswell.td

 def: InstRW<[HWWriteResGroup9], (instregex "VPBLENDD(Y?)rri")>;
 
 def HWWriteResGroup10 : SchedWriteRes<[HWPort0156]> {
   let Latency = 1;
   let NumMicroOps = 1;
   let ResourceCycles = [1];
 }
 def: InstRW<[HWWriteResGroup10], (instrs CBW, CWDE, CDQE,
-                                         CLC, CMC, STC)>;
+                                         CMC, STC)>;
 def: InstRW<[HWWriteResGroup10], (instrs LAHF, SAHF)>; // TODO: This doesn't match Agner's data
 def: InstRW<[HWWriteResGroup10], (instregex "NOOP",
                                             "SGDT64m",
                                             "SIDT64m",
                                             "SMSW16m",
                                             "STRm",
                                             "SYSCALL")>;
 

 def HWWriteResGroup192 : SchedWriteRes<[HWPort0, HWPort5, HWPort06, HWPort15, HWPort015, HWPort23]> {
   let Latency = 25;
   let NumMicroOps = 15;
   let ResourceCycles = [3,3,2,1,4,2];
 }
 def: InstRW<[HWWriteResGroup192], (instrs VGATHERQPSrm,
                                           VGATHERDPSrm)>;
 
+def: InstRW<[WriteZero], (instrs CLC)>;
+
 } // SchedModel

llvm/trunk/lib/Target/X86/X86SchedSandyBridge.td

 
 def SBWriteResGroup131 : SchedWriteRes<[SBPort0,SBPort1,SBPort23]> {
   let Latency = 34;
   let NumMicroOps = 3;
   let ResourceCycles = [1,1,1];
 }
 def: InstRW<[SBWriteResGroup131], (instregex "DIV(R?)_FI(16|32)m")>;
 
+def: InstRW<[WriteZero], (instrs CLC)>;
+
 } // SchedModel

llvm/trunk/lib/Target/X86/X86SchedSkylakeClient.td

def: InstRW<[SKLWriteResGroup9], (instregex "(V?)PADD(B|D|Q|W)(Y?)rr",
                                             "(V?)PSUB(B|D|Q|W)(Y?)rr")>;
 
 def SKLWriteResGroup10 : SchedWriteRes<[SKLPort0156]> {
   let Latency = 1;
   let NumMicroOps = 1;
   let ResourceCycles = [1];
 }
 def: InstRW<[SKLWriteResGroup10], (instrs CBW, CWDE, CDQE,
-                                          CLC, CMC, STC)>;
+                                          CMC, STC)>;
 def: InstRW<[SKLWriteResGroup10], (instrs LAHF, SAHF)>; // TODO: This doesn't match Agner's data
 def: InstRW<[SKLWriteResGroup10], (instregex "NOOP",
                                              "SGDT64m",
                                              "SIDT64m",
                                              "SMSW16m",
                                              "STRm",
                                              "SYSCALL")>;
 

 
 def SKLWriteResGroup223 : SchedWriteRes<[SKLPort0,SKLPort1,SKLPort4,SKLPort5,SKLPort6,SKLPort237,SKLPort06,SKLPort0156]> {
   let Latency = 106;
   let NumMicroOps = 100;
   let ResourceCycles = [9,1,11,16,1,11,21,30];
 }
 def: InstRW<[SKLWriteResGroup223], (instrs FSTENVm)>;
 
+def: InstRW<[WriteZero], (instrs CLC)>;
+
 } // SchedModel

llvm/trunk/lib/Target/X86/X86SchedSkylakeServer.td

def: InstRW<[SKXWriteResGroup9], (instregex "VBLENDMPD(Z|Z128|Z256)rr",
                                             "VPTERNLOGQ(Z|Z128|Z256)rri")>;
 
 def SKXWriteResGroup10 : SchedWriteRes<[SKXPort0156]> {
   let Latency = 1;
   let NumMicroOps = 1;
   let ResourceCycles = [1];
 }
 def: InstRW<[SKXWriteResGroup10], (instrs CBW, CWDE, CDQE,
-                                          CLC, CMC, STC)>;
+                                          CMC, STC)>;
 def: InstRW<[SKXWriteResGroup10], (instrs LAHF, SAHF)>; // TODO: This doesn't match Agner's data
 def: InstRW<[SKXWriteResGroup10], (instregex "NOOP",
                                              "SGDT64m",
                                              "SIDT64m",
                                              "SMSW16m",
                                              "STRm",
                                              "SYSCALL")>;
 

 def: InstRW<[SKXWriteResGroup266], (instrs FSTENVm)>;
 
 def SKXWriteResGroup267 : SchedWriteRes<[SKXPort6,SKXPort0156]> {
   let Latency = 140;
   let NumMicroOps = 4;
   let ResourceCycles = [1,3];
 }
 def: InstRW<[SKXWriteResGroup267], (instrs PAUSE)>;
+
+def: InstRW<[WriteZero], (instrs CLC)>;
+
 } // SchedModel

llvm/trunk/test/CodeGen/X86/schedule-x86_64.ll

; ZNVER1-NEXT:    retq # sched: [1:0.50]
   tail call void asm "cbw \0A\09 cdq \0A\09 cdqe \0A\09 cqo \0A\09 cwd \0A\09 cwde", ""() nounwind
   ret void
 }
 
 define void @test_clc_cld_cmc() optsize {
 ; GENERIC-LABEL: test_clc_cld_cmc:
 ; GENERIC:       # %bb.0:
 ; GENERIC-NEXT:    #APP
-; GENERIC-NEXT:    clc # sched: [1:0.33]
+; GENERIC-NEXT:    clc # sched: [1:?]
 ; GENERIC-NEXT:    cld # sched: [1:0.33]
 ; GENERIC-NEXT:    cmc # sched: [1:0.33]
 ; GENERIC-NEXT:    #NO_APP
 ; GENERIC-NEXT:    retq # sched: [1:1.00]
 ;
 ; ATOM-LABEL: test_clc_cld_cmc:
 ; ATOM:       # %bb.0:
 ; ATOM-NEXT:    #APP

 ; SLM-NEXT:    cld # sched: [1:0.50]
 ; SLM-NEXT:    cmc # sched: [1:0.50]
 ; SLM-NEXT:    #NO_APP
 ; SLM-NEXT:    retq # sched: [4:1.00]
 ;
 ; SANDY-LABEL: test_clc_cld_cmc:
 ; SANDY:       # %bb.0:
 ; SANDY-NEXT:    #APP
-; SANDY-NEXT:    clc # sched: [1:0.33]
+; SANDY-NEXT:    clc # sched: [1:?]
 ; SANDY-NEXT:    cld # sched: [1:0.33]
 ; SANDY-NEXT:    cmc # sched: [1:0.33]
 ; SANDY-NEXT:    #NO_APP
 ; SANDY-NEXT:    retq # sched: [1:1.00]
 ;
 ; HASWELL-LABEL: test_clc_cld_cmc:
 ; HASWELL:       # %bb.0:
 ; HASWELL-NEXT:    #APP
-; HASWELL-NEXT:    clc # sched: [1:0.25]
+; HASWELL-NEXT:    clc # sched: [1:?]
 ; HASWELL-NEXT:    cld # sched: [3:1.00]
 ; HASWELL-NEXT:    cmc # sched: [1:0.25]
 ; HASWELL-NEXT:    #NO_APP
 ; HASWELL-NEXT:    retq # sched: [7:1.00]
 ;
 ; BROADWELL-LABEL: test_clc_cld_cmc:
 ; BROADWELL:       # %bb.0:
 ; BROADWELL-NEXT:    #APP
-; BROADWELL-NEXT:    clc # sched: [1:0.25]
+; BROADWELL-NEXT:    clc # sched: [1:?]
 ; BROADWELL-NEXT:    cld # sched: [3:1.00]
 ; BROADWELL-NEXT:    cmc # sched: [1:0.25]
 ; BROADWELL-NEXT:    #NO_APP
 ; BROADWELL-NEXT:    retq # sched: [7:1.00]
 ;
 ; SKYLAKE-LABEL: test_clc_cld_cmc:
 ; SKYLAKE:       # %bb.0:
 ; SKYLAKE-NEXT:    #APP
-; SKYLAKE-NEXT:    clc # sched: [1:0.25]
+; SKYLAKE-NEXT:    clc # sched: [1:?]
 ; SKYLAKE-NEXT:    cld # sched: [3:1.00]
 ; SKYLAKE-NEXT:    cmc # sched: [1:0.25]
 ; SKYLAKE-NEXT:    #NO_APP
 ; SKYLAKE-NEXT:    retq # sched: [7:1.00]
 ;
 ; SKX-LABEL: test_clc_cld_cmc:
 ; SKX:       # %bb.0:
 ; SKX-NEXT:    #APP
-; SKX-NEXT:    clc # sched: [1:0.25]
+; SKX-NEXT:    clc # sched: [1:?]
 ; SKX-NEXT:    cld # sched: [3:1.00]
 ; SKX-NEXT:    cmc # sched: [1:0.25]
 ; SKX-NEXT:    #NO_APP
 ; SKX-NEXT:    retq # sched: [7:1.00]
 ;
 ; BTVER2-LABEL: test_clc_cld_cmc:
 ; BTVER2:       # %bb.0:
 ; BTVER2-NEXT:    #APP

llvm/trunk/test/tools/llvm-mca/X86/Atom/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     1.00                        btq $7, %rdi
 # CHECK-NEXT:  1      1     1.00                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     1.00                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     1.00                        btsq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  1      2     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  1      2     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  1      2     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1     0.50                  *     clc
 # CHECK-NEXT:  1      1     0.50                        decb  %dil
 # CHECK-NEXT:  1      1     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decw  %di
 # CHECK-NEXT:  1      1     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decl  %edi
 # CHECK-NEXT:  1      1     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decq  %rdi
 # CHECK-NEXT:  1      1     1.00    *      *            decq  (%rax)

 # CHECK-NEXT:  1      1     1.00    *                   xorq  (%rax), %rdi
 
 # CHECK:      Resources:
 # CHECK-NEXT: [0]   - AtomPort0
 # CHECK-NEXT: [1]   - AtomPort1
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]
-# CHECK-NEXT: 1258.00 963.00
+# CHECK-NEXT: 1258.50 963.50
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    Instructions:
 # CHECK-NEXT: 0.50   0.50   adcb  $7, %al
 # CHECK-NEXT: 0.50   0.50   adcb  $7, %dil
 # CHECK-NEXT: 1.00    -     adcb  $7, (%rax)
 # CHECK-NEXT: 0.50   0.50   adcb  %dil, %dil
 # CHECK-NEXT: 1.00    -     adcb  %dil, (%rax)

 # CHECK-NEXT:  -     1.00   btq $7, %rdi
 # CHECK-NEXT:  -     1.00   btcq  $7, %rdi
 # CHECK-NEXT:  -     1.00   btrq  $7, %rdi
 # CHECK-NEXT:  -     1.00   btsq  $7, %rdi
 # CHECK-NEXT: 0.50   0.50   btq $7, (%rax)
 # CHECK-NEXT: 1.00   1.00   btcq  $7, (%rax)
 # CHECK-NEXT: 1.00   1.00   btrq  $7, (%rax)
 # CHECK-NEXT: 1.00   1.00   btsq  $7, (%rax)
+# CHECK-NEXT: 0.50   0.50   clc
 # CHECK-NEXT: 0.50   0.50   decb  %dil
 # CHECK-NEXT: 1.00    -     decb  (%rax)
 # CHECK-NEXT: 0.50   0.50   decw  %di
 # CHECK-NEXT: 1.00    -     decw  (%rax)
 # CHECK-NEXT: 0.50   0.50   decl  %edi
 # CHECK-NEXT: 1.00    -     decl  (%rax)
 # CHECK-NEXT: 0.50   0.50   decq  %rdi
 # CHECK-NEXT: 1.00    -     decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/Broadwell/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  2      6     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1      -                    *     clc
 # CHECK-NEXT:  1      1     0.25                        decb  %dil
 # CHECK-NEXT:  3      7     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decw  %di
 # CHECK-NEXT:  3      7     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decl  %edi
 # CHECK-NEXT:  3      7     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decq  %rdi
 # CHECK-NEXT:  3      7     1.00    *      *            decq  (%rax)

 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btq $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btsq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -     0.50   0.50    -      -     0.50    -     btq $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btcq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btrq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btsq  $7, (%rax)
+# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     clc
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decb  %dil
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decb  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decw  %di
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decw  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decl  %edi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decl  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decq  %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/BtVer2/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  2      4     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  2      4     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  2      4     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1     0.50                  *     clc
 # CHECK-NEXT:  1      1     0.50                        decb  %dil
 # CHECK-NEXT:  2      5     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decw  %di
 # CHECK-NEXT:  2      5     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decl  %edi
 # CHECK-NEXT:  2      5     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decq  %rdi
 # CHECK-NEXT:  2      5     1.00    *      *            decq  (%rax)

 # CHECK-NEXT: [9]   - JSAGU
 # CHECK-NEXT: [10]  - JSTC
 # CHECK-NEXT: [11]  - JVALU0
 # CHECK-NEXT: [12]  - JVALU1
 # CHECK-NEXT: [13]  - JVIMUL
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]
-# CHECK-NEXT: 436.50 486.50 380.00  -      -      -      -     263.00 64.00  195.00  -      -      -      -
+# CHECK-NEXT: 437.00 487.00 380.00  -      -      -      -     263.00 64.00  195.00  -      -      -      -
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]   Instructions:
 # CHECK-NEXT: 1.00   1.00    -      -      -      -      -      -      -      -      -      -      -      -     adcb  $7, %al
 # CHECK-NEXT: 1.00   1.00    -      -      -      -      -      -      -      -      -      -      -      -     adcb  $7, %dil
 # CHECK-NEXT: 1.00   1.00    -      -      -      -      -     1.00    -     1.00    -      -      -      -     adcb  $7, (%rax)
 # CHECK-NEXT: 1.00   1.00    -      -      -      -      -      -      -      -      -      -      -      -     adcb  %dil, %dil
 # CHECK-NEXT: 1.00   1.00    -      -      -      -      -     1.00    -     1.00    -      -      -      -     adcb  %dil, (%rax)

 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     btq $7, %rdi
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     btcq  $7, %rdi
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     btrq  $7, %rdi
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     btsq  $7, %rdi
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     btq $7, (%rax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     btcq  $7, (%rax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     btrq  $7, (%rax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     btsq  $7, (%rax)
+# CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     clc
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     decb  %dil
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     decb  (%rax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     decw  %di
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     decw  (%rax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     decl  %edi
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     decl  (%rax)
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -     decq  %rdi
 # CHECK-NEXT: 0.50   0.50    -      -      -      -      -     1.00    -     1.00    -      -      -      -     decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/Haswell/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  2      6     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  4      7     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  4      7     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  4      7     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1      -                    *     clc
 # CHECK-NEXT:  1      1     0.25                        decb  %dil
 # CHECK-NEXT:  3      7     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decw  %di
 # CHECK-NEXT:  3      7     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decl  %edi
 # CHECK-NEXT:  3      7     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decq  %rdi
 # CHECK-NEXT:  3      7     1.00    *      *            decq  (%rax)

 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btq $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btsq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -     0.50   0.50    -      -     0.50    -     btq $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btcq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btrq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btsq  $7, (%rax)
+# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     clc
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decb  %dil
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decb  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decw  %di
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decw  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decl  %edi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decl  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decq  %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/SLM/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  2      4     2.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  2      4     2.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  2      4     2.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1     0.50                  *     clc
 # CHECK-NEXT:  1      1     0.50                        decb  %dil
 # CHECK-NEXT:  2      5     2.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decw  %di
 # CHECK-NEXT:  2      5     2.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decl  %edi
 # CHECK-NEXT:  2      5     2.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.50                        decq  %rdi
 # CHECK-NEXT:  2      5     2.00    *      *            decq  (%rax)

 # CHECK-NEXT: [3]   - SLM_FPC_RSV0
 # CHECK-NEXT: [4]   - SLM_FPC_RSV1
 # CHECK-NEXT: [5]   - SLM_IEC_RSV0
 # CHECK-NEXT: [6]   - SLM_IEC_RSV1
 # CHECK-NEXT: [7]   - SLM_MEC_RSV
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]
-# CHECK-NEXT: 400.00  -      -      -      -     391.50 233.50 470.00
+# CHECK-NEXT: 400.00  -      -      -      -     392.00 234.00 470.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    Instructions:
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     adcb  $7, %al
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     adcb  $7, %dil
 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00   2.00   adcb  $7, (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     adcb  %dil, %dil
 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00   2.00   adcb  %dil, (%rax)

 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     btq $7, %rdi
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     btsq  $7, %rdi
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     btq $7, (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50   2.00   btcq  $7, (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50   2.00   btrq  $7, (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50   2.00   btsq  $7, (%rax)
+# CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     clc
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     decb  %dil
 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00   2.00   decb  (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     decw  %di
 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00   2.00   decw  (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     decl  %edi
 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00   2.00   decl  (%rax)
 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -     decq  %rdi
 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00   2.00   decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/SandyBridge/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  2      6     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  4      7     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  4      7     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  4      7     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1      -                    *     clc
 # CHECK-NEXT:  1      1     0.33                        decb  %dil
 # CHECK-NEXT:  3      7     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.33                        decw  %di
 # CHECK-NEXT:  3      7     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.33                        decl  %edi
 # CHECK-NEXT:  3      7     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.33                        decq  %rdi
 # CHECK-NEXT:  3      7     1.00    *      *            decq  (%rax)

 # CHECK-NEXT:  -      -     0.50    -      -     0.50    -      -     btq $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -     0.50    -      -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -     0.50    -      -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -     0.50    -      -     btsq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -     0.50   0.50   0.50   btq $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     1.00   0.50   1.00   1.00   btcq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     1.00   0.50   1.00   1.00   btrq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     1.00   0.50   1.00   1.00   btsq  $7, (%rax)
+# CHECK-NEXT:  -      -      -      -      -      -      -      -     clc
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     decb  %dil
 # CHECK-NEXT:  -      -     0.33   0.33   1.00   0.33   1.00   1.00   decb  (%rax)
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     decw  %di
 # CHECK-NEXT:  -      -     0.33   0.33   1.00   0.33   1.00   1.00   decw  (%rax)
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     decl  %edi
 # CHECK-NEXT:  -      -     0.33   0.33   1.00   0.33   1.00   1.00   decl  (%rax)
 # CHECK-NEXT:  -      -     0.33   0.33    -     0.33    -      -     decq  %rdi
 # CHECK-NEXT:  -      -     0.33   0.33   1.00   0.33   1.00   1.00   decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/SkylakeClient/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  2      6     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1      -                    *     clc
 # CHECK-NEXT:  1      1     0.25                        decb  %dil
 # CHECK-NEXT:  3      7     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decw  %di
 # CHECK-NEXT:  3      7     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decl  %edi
 # CHECK-NEXT:  3      7     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decq  %rdi
 # CHECK-NEXT:  3      7     1.00    *      *            decq  (%rax)

 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btq $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btsq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -     0.50   0.50    -      -     0.50    -     btq $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btcq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btrq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btsq  $7, (%rax)
+# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     clc
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decb  %dil
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decb  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decw  %di
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decw  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decl  %edi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decl  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decq  %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/SkylakeServer/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.50                        btq $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btcq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btrq  $7, %rdi
 # CHECK-NEXT:  1      1     0.50                        btsq  $7, %rdi
 # CHECK-NEXT:  2      6     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  4      6     1.00    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1      -                    *     clc
 # CHECK-NEXT:  1      1     0.25                        decb  %dil
 # CHECK-NEXT:  3      7     1.00    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decw  %di
 # CHECK-NEXT:  3      7     1.00    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decl  %edi
 # CHECK-NEXT:  3      7     1.00    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decq  %rdi
 # CHECK-NEXT:  3      7     1.00    *      *            decq  (%rax)

 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btq $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -      -      -      -      -     0.50    -     btsq  $7, %rdi
 # CHECK-NEXT:  -      -     0.50    -     0.50   0.50    -      -     0.50    -     btq $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btcq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btrq  $7, (%rax)
 # CHECK-NEXT:  -      -     0.50    -     0.83   0.83   1.00    -     0.50   0.33   btsq  $7, (%rax)
+# CHECK-NEXT:  -      -      -      -      -      -      -      -      -      -     clc
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decb  %dil
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decb  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decw  %di
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decw  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decl  %edi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decl  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25    -      -      -     0.25   0.25    -     decq  %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.83   0.83   1.00   0.25   0.25   0.33   decq  (%rax)

llvm/trunk/test/tools/llvm-mca/X86/Znver1/resources-x86_64.s

 btcq $7, %rdi
 btrq $7, %rdi
 btsq $7, %rdi
 btq  $7, (%rax)
 btcq $7, (%rax)
 btrq $7, (%rax)
 btsq $7, (%rax)
 
+clc
+
 decb %dil
 decb (%rax)
 decw %di
 decw (%rax)
 decl %edi
 decl (%rax)
 decq %rdi
 decq (%rax)

 # CHECK-NEXT:  1      1     0.25                        btq $7, %rdi
 # CHECK-NEXT:  2      2     0.25                        btcq  $7, %rdi
 # CHECK-NEXT:  2      2     0.25                        btrq  $7, %rdi
 # CHECK-NEXT:  2      2     0.25                        btsq  $7, %rdi
 # CHECK-NEXT:  2      5     0.50    *                   btq $7, (%rax)
 # CHECK-NEXT:  2      6     0.50    *      *            btcq  $7, (%rax)
 # CHECK-NEXT:  2      6     0.50    *      *            btrq  $7, (%rax)
 # CHECK-NEXT:  2      6     0.50    *      *            btsq  $7, (%rax)
+# CHECK-NEXT:  1      1     0.25                  *     clc
 # CHECK-NEXT:  1      1     0.25                        decb  %dil
 # CHECK-NEXT:  2      5     0.50    *      *            decb  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decw  %di
 # CHECK-NEXT:  2      5     0.50    *      *            decw  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decl  %edi
 # CHECK-NEXT:  2      5     0.50    *      *            decl  (%rax)
 # CHECK-NEXT:  1      1     0.25                        decq  %rdi
 # CHECK-NEXT:  2      5     0.50    *      *            decq  (%rax)

 # CHECK-NEXT: [7]   - ZnFPU0
 # CHECK-NEXT: [8]   - ZnFPU1
 # CHECK-NEXT: [9]   - ZnFPU2
 # CHECK-NEXT: [10]  - ZnFPU3
 # CHECK-NEXT: [11]  - ZnMultiplier
 
 # CHECK:      Resource pressure per iteration:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]
-# CHECK-NEXT: 131.50 131.50 111.50 145.50 127.50 111.50 392.00  -      -      -      -     34.00
+# CHECK-NEXT: 131.50 131.50 111.75 145.75 127.75 111.75 392.00  -      -      -      -     34.00
 
 # CHECK:      Resource pressure by instruction:
 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   Instructions:
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     adcb  $7, %al
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     adcb  $7, %dil
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     adcb  $7, (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     adcb  %dil, %dil
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     adcb  %dil, (%rax)

 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     btq $7, %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     btcq  $7, %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     btrq  $7, %rdi
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     btsq  $7, %rdi
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     btq $7, (%rax)
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     btcq  $7, (%rax)
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     btrq  $7, (%rax)
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     btsq  $7, (%rax)
+# CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     clc
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     decb  %dil
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     decb  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     decw  %di
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     decw  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     decl  %edi
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     decl  (%rax)
 # CHECK-NEXT:  -      -     0.25   0.25   0.25   0.25    -      -      -      -      -      -     decq  %rdi
 # CHECK-NEXT: 0.50   0.50   0.25   0.25   0.25   0.25    -      -      -      -      -      -     decq  (%rax)