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[X86] Fix stale comment in folding tables.

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llvm-svn: 334758
This commit is contained in:
Craig Topper 2018-06-14 19:28:31 +00:00
parent 5608dfed6a
commit bb91ae466c
1 changed files with 3 additions and 3 deletions
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6
lib/Target/X86/X86InstrInfo.cpp
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@ -805,9 +805,9 @@ X86InstrInfo::X86InstrInfo(X86Subtarget &STI)
// VBROADCASTS{SD}rr register instructions were an AVX2 addition while the
// VBROADCASTS{SD}rm memory instructions were available from AVX1.
// TB_NO_REVERSE prevents unfolding from introducing an illegal instruction
// on AVX1 targets. The VPBROADCAST instructions are all AVX2 instructions
// so they don't need an equivalent limitation.
// TB_NO_REVERSE prevents unfolding because doing so would create a full
// vector load while the broadcast load would have only been a single
// element.
{ X86::VBROADCASTSSrr, X86::VBROADCASTSSrm, TB_NO_REVERSE },
{ X86::VBROADCASTSSYrr, X86::VBROADCASTSSYrm, TB_NO_REVERSE },
{ X86::VBROADCASTSDYrr, X86::VBROADCASTSDYrm, TB_NO_REVERSE },