test/tools/llvm-mca/X86/BdVer2/dependency-breaking-cmp.s

   1 # NOTE: Assertions have been autogenerated by utils/update_mca_test_checks.py
   2 # RUN: llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=bdver2 -timeline -timeline-max-iterations=3 -iterations=1500 < %s | FileCheck %s
   3
   4 # Perf stat reports an IPC of 1.97 for this block of code.
   5
   6 # The CMP instruction doesn't depend on the value of EAX.  It can set the flags
   7 # without having to read the inputs.
   8
   9 cmp %eax, %eax
  10 cmovae %ebx, %eax
  11
  12 # CHECK:      Iterations:        1500
  13 # CHECK-NEXT: Instructions:      3000
  14 # CHECK-NEXT: Total Cycles:      2253
  15 # CHECK-NEXT: Total uOps:        3000
  16
  17 # CHECK:      Dispatch Width:    4
  18 # CHECK-NEXT: uOps Per Cycle:    1.33
  19 # CHECK-NEXT: IPC:               1.33
  20 # CHECK-NEXT: Block RThroughput: 1.5
  21
  22 # CHECK:      Instruction Info:
  23 # CHECK-NEXT: [1]: #uOps
  24 # CHECK-NEXT: [2]: Latency
  25 # CHECK-NEXT: [3]: RThroughput
  26 # CHECK-NEXT: [4]: MayLoad
  27 # CHECK-NEXT: [5]: MayStore
  28 # CHECK-NEXT: [6]: HasSideEffects (U)
  29
  30 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
  31 # CHECK-NEXT:  1      1     1.00                        cmpl    %eax, %eax
  32 # CHECK-NEXT:  1      1     0.50                        cmovael %ebx, %eax
  33
  34 # CHECK:      Resources:
  35 # CHECK-NEXT: [0.0] - PdAGLU01
  36 # CHECK-NEXT: [0.1] - PdAGLU01
  37 # CHECK-NEXT: [1]   - PdBranch
  38 # CHECK-NEXT: [2]   - PdCount
  39 # CHECK-NEXT: [3]   - PdDiv
  40 # CHECK-NEXT: [4]   - PdEX0
  41 # CHECK-NEXT: [5]   - PdEX1
  42 # CHECK-NEXT: [6]   - PdFPCVT
  43 # CHECK-NEXT: [7.0] - PdFPFMA
  44 # CHECK-NEXT: [7.1] - PdFPFMA
  45 # CHECK-NEXT: [8.0] - PdFPMAL
  46 # CHECK-NEXT: [8.1] - PdFPMAL
  47 # CHECK-NEXT: [9]   - PdFPMMA
  48 # CHECK-NEXT: [10]  - PdFPSTO
  49 # CHECK-NEXT: [11]  - PdFPU0
  50 # CHECK-NEXT: [12]  - PdFPU1
  51 # CHECK-NEXT: [13]  - PdFPU2
  52 # CHECK-NEXT: [14]  - PdFPU3
  53 # CHECK-NEXT: [15]  - PdFPXBR
  54 # CHECK-NEXT: [16.0] - PdLoad
  55 # CHECK-NEXT: [16.1] - PdLoad
  56 # CHECK-NEXT: [17]  - PdMul
  57 # CHECK-NEXT: [18]  - PdStore
  58
  59 # CHECK:      Resource pressure per iteration:
  60 # CHECK-NEXT: [0.0]  [0.1]  [1]    [2]    [3]    [4]    [5]    [6]    [7.0]  [7.1]  [8.0]  [8.1]  [9]    [10]   [11]   [12]   [13]   [14]   [15]   [16.0] [16.1] [17]   [18]
  61 # CHECK-NEXT:  -      -      -      -      -     1.50   1.50    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -
  62
  63 # CHECK:      Resource pressure by instruction:
  64 # CHECK-NEXT: [0.0]  [0.1]  [1]    [2]    [3]    [4]    [5]    [6]    [7.0]  [7.1]  [8.0]  [8.1]  [9]    [10]   [11]   [12]   [13]   [14]   [15]   [16.0] [16.1] [17]   [18]   Instructions:
  65 # CHECK-NEXT:  -      -      -      -      -     1.00   1.00    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -     cmpl     %eax, %eax
  66 # CHECK-NEXT:  -      -      -      -      -     0.50   0.50    -      -      -      -      -      -      -      -      -      -      -      -      -      -      -      -     cmovael  %ebx, %eax
  67
  68 # CHECK:      Timeline view:
  69 # CHECK-NEXT: Index     01234567
  70
  71 # CHECK:      [0,0]     DeER . .   cmpl %eax, %eax
  72 # CHECK-NEXT: [0,1]     D==eER .   cmovael      %ebx, %eax
  73 # CHECK-NEXT: [1,0]     DeE--R .   cmpl %eax, %eax
  74 # CHECK-NEXT: [1,1]     D===eER.   cmovael      %ebx, %eax
  75 # CHECK-NEXT: [2,0]     .D=eE-R.   cmpl %eax, %eax
  76 # CHECK-NEXT: [2,1]     .D===eER   cmovael      %ebx, %eax
  77
  78 # CHECK:      Average Wait times (based on the timeline view):
  79 # CHECK-NEXT: [0]: Executions
  80 # CHECK-NEXT: [1]: Average time spent waiting in a scheduler's queue
  81 # CHECK-NEXT: [2]: Average time spent waiting in a scheduler's queue while ready
  82 # CHECK-NEXT: [3]: Average time elapsed from WB until retire stage
  83
  84 # CHECK:            [0]    [1]    [2]    [3]
  85 # CHECK-NEXT: 0.     3     1.3    1.3    1.0       cmpl %eax, %eax
  86 # CHECK-NEXT: 1.     3     3.7    0.3    0.0       cmovael      %ebx, %eax