test/tools/llvm-mca/X86/BtVer2/dependency-breaking-sbb-1.s

   1 # NOTE: Assertions have been autogenerated by utils/update_mca_test_checks.py
   2 # RUN: llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 -timeline -timeline-max-iterations=3 -iterations=1500 < %s | FileCheck %s
   3
   4 # perf stat reports an IPC of 1.00 for this code block.
   5
   6 # Although both SBB are dependency breaking instructions, there is still an
   7 # implicit dependency on EFLAGS which limits the ILP. So, the hardware backend
   8 # can only execute one instruction per cycle.
   9
  10 sbb %edx, %edx
  11 sbb %eax, %eax
  12
  13 # CHECK:      Iterations:        1500
  14 # CHECK-NEXT: Instructions:      3000
  15 # CHECK-NEXT: Total Cycles:      3003
  16 # CHECK-NEXT: Total uOps:        3000
  17
  18 # CHECK:      Dispatch Width:    2
  19 # CHECK-NEXT: uOps Per Cycle:    1.00
  20 # CHECK-NEXT: IPC:               1.00
  21 # CHECK-NEXT: Block RThroughput: 2.0
  22
  23 # CHECK:      Instruction Info:
  24 # CHECK-NEXT: [1]: #uOps
  25 # CHECK-NEXT: [2]: Latency
  26 # CHECK-NEXT: [3]: RThroughput
  27 # CHECK-NEXT: [4]: MayLoad
  28 # CHECK-NEXT: [5]: MayStore
  29 # CHECK-NEXT: [6]: HasSideEffects (U)
  30
  31 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
  32 # CHECK-NEXT:  1      1     1.00                        sbbl    %edx, %edx
  33 # CHECK-NEXT:  1      1     1.00                        sbbl    %eax, %eax
  34
  35 # CHECK:      Resources:
  36 # CHECK-NEXT: [0]   - JALU0
  37 # CHECK-NEXT: [1]   - JALU1
  38 # CHECK-NEXT: [2]   - JDiv
  39 # CHECK-NEXT: [3]   - JFPA
  40 # CHECK-NEXT: [4]   - JFPM
  41 # CHECK-NEXT: [5]   - JFPU0
  42 # CHECK-NEXT: [6]   - JFPU1
  43 # CHECK-NEXT: [7]   - JLAGU
  44 # CHECK-NEXT: [8]   - JMul
  45 # CHECK-NEXT: [9]   - JSAGU
  46 # CHECK-NEXT: [10]  - JSTC
  47 # CHECK-NEXT: [11]  - JVALU0
  48 # CHECK-NEXT: [12]  - JVALU1
  49 # CHECK-NEXT: [13]  - JVIMUL
  50
  51 # CHECK:      Resource pressure per iteration:
  52 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]
  53 # CHECK-NEXT: 2.00   2.00    -      -      -      -      -      -      -      -      -      -      -      -
  54
  55 # CHECK:      Resource pressure by instruction:
  56 # CHECK-NEXT: [0]    [1]    [2]    [3]    [4]    [5]    [6]    [7]    [8]    [9]    [10]   [11]   [12]   [13]   Instructions:
  57 # CHECK-NEXT:  -     2.00    -      -      -      -      -      -      -      -      -      -      -      -     sbbl    %edx, %edx
  58 # CHECK-NEXT: 2.00    -      -      -      -      -      -      -      -      -      -      -      -      -     sbbl    %eax, %eax
  59
  60 # CHECK:      Timeline view:
  61 # CHECK-NEXT: Index     012345678
  62
  63 # CHECK:      [0,0]     DeER .  .   sbbl        %edx, %edx
  64 # CHECK-NEXT: [0,1]     D=eER.  .   sbbl        %eax, %eax
  65 # CHECK-NEXT: [1,0]     .D=eER  .   sbbl        %edx, %edx
  66 # CHECK-NEXT: [1,1]     .D==eER .   sbbl        %eax, %eax
  67 # CHECK-NEXT: [2,0]     . D==eER.   sbbl        %edx, %edx
  68 # CHECK-NEXT: [2,1]     . D===eER   sbbl        %eax, %eax
  69
  70 # CHECK:      Average Wait times (based on the timeline view):
  71 # CHECK-NEXT: [0]: Executions
  72 # CHECK-NEXT: [1]: Average time spent waiting in a scheduler's queue
  73 # CHECK-NEXT: [2]: Average time spent waiting in a scheduler's queue while ready
  74 # CHECK-NEXT: [3]: Average time elapsed from WB until retire stage
  75
  76 # CHECK:            [0]    [1]    [2]    [3]
  77 # CHECK-NEXT: 0.     3     2.0    0.3    0.0       sbbl %edx, %edx
  78 # CHECK-NEXT: 1.     3     3.0    0.0    0.0       sbbl %eax, %eax