[PATCH] D46945: [llvm-exegesis] Analysis: detect clustering inconsistencies.

[Clement Courbet via Phabricator via llvm-commits]

courbet added a comment.

Sample output:

  Sched Class MOVSX32rr16_MOVSX32rr8_MOVSX32rr8_NOREX_MOVSX64rr16_MOVSX64rr8_MOVZX32rr16_MOVZX32rr8_MOVZX32rr8_NOREX_MOVZX64rr16_MOVZX64rr8 contains instructions with distinct performance characteristics, falling into 2 clusters:
  2,MOVSX32rr16,,1.01
  3,MOVSX32rr8,,2.01
  2,MOVSX32rr8_NOREX,,1.01
  2,MOVSX64rr16,,1.01
  2,MOVZX32rr16,,1.00
  3,MOVZX32rr8,,2.01
  3,MOVZX32rr8_NOREX,,2.01
  2,MOVZX64rr16,,1.00
  
  Sched Class ADC16ri_ADC16ri8_ADC32ri_ADC32ri8_ADC64ri32_ADC64ri8_ADC8ri_ADC8ri8_ADC16rr_ADC16rr_REV_ADC32rr_ADC32rr_REV_ADC64rr_ADC64rr_REV_ADC8rr_ADC8rr_REV_ADC16i16_ADC32i32_ADC64i32_ADC8i8_SBB16ri_SBB16ri8_SBB32ri_SBB32ri8_SBB64ri32_SBB64ri8_SBB8ri_SBB8ri8_SBB16rr_SBB16rr_REV_SBB32rr_SBB32rr_REV_SBB64rr_SBB64rr_REV_SBB8rr_SBB8rr_REV_SBB16i16_SBB32i32_SBB64i32_SBB8i8 contains instructions with distinct performance characteristics, falling into 2 clusters:
  3,ADC8i8,,2.00
  2,ADC8ri,,1.01
  3,SBB8i8,,2.01
  2,SBB8ri,,1.01
  
  Sched Class EXTRACTPSrr_VEXTRACTPSrr contains instructions with distinct performance characteristics, falling into 2 clusters:
  4,EXTRACTPSrr,,3.00
  3,VEXTRACTPSrr,,2.01
  
  Sched Class WriteVecExtract contains instructions with distinct performance characteristics, falling into 2 clusters:
  9,VPEXTRBrr,,1.50
  4,VPEXTRWrr,,3.01
  
  Sched Class WriteCRC32 contains instructions with distinct performance characteristics, falling into 2 clusters:
  4,CRC32r32r16,,3.01
  4,CRC32r32r32,,3.00
  11,CRC32r32r8,,4.01
  4,CRC32r64r64,,3.01
  4,CRC32r64r8,,3.00
  
  Sched Class WritePMULLD contains instructions with distinct performance characteristics, falling into 2 clusters:
  13,PMULLDrr,,10.01
  14,VPMULLDrr,,11.01


Repository:
  rL LLVM

https://reviews.llvm.org/D46945