[Bug target/127743] [15/16/17 Regression] x86: V2HF CONSTRUCTOR {x, 0.0} expanded as pinsrw + 32-bit store, lane 1 never zeroed

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127743

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
_.expand is OK:

  148: r106:HF=[r118:DI+0x2]
  149: flags:CCZ=cmp(r111:DI,r114:DI)
  150: pc={(flags:CCZ==0)?L165:pc}
      REG_BR_PROB 187153201
  151: NOTE_INSN_BASIC_BLOCK 22
  152: r211:HF=[`*.LC1']
      REG_EQUAL 0.0
  153: r210:HI=r211:HF#0
  154: r212:SI=zero_extend(r210:HI)
  155: r213:HI=r106:HF#0
  156: r214:SI=zero_extend(r213:HI)
  157: {r215:SI=r212:SI<<0x10;clobber flags:CC;}
  158: {r216:SI=r215:SI|r214:SI;clobber flags:CC;}
  159: r209:V2HF=r216:SI#0
  160: [r111:DI]=r209:V2HF