[all-commits] [llvm/llvm-project] 09d51a: [PowerPC][AIX] Enable aix-small-local-dynamic-tls ...

[Felix (Ting Wang) via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 09d51a841dcfbc41c3d7f3274b109b5f9fb09bb0
      https://github.com/llvm/llvm-project/commit/09d51a841dcfbc41c3d7f3274b109b5f9fb09bb0
  Author: Felix (Ting Wang) <Ting.Wang.SH at ibm.com>
  Date:   2024-04-12 (Fri, 12 Apr 2024)

  Changed paths:
    M llvm/lib/Target/PowerPC/MCTargetDesc/PPCXCOFFObjectWriter.cpp
    M llvm/lib/Target/PowerPC/PPC.td
    M llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
    M llvm/lib/Target/PowerPC/PPCISelLowering.cpp
    M llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
    M llvm/lib/Target/PowerPC/PPCSubtarget.cpp
    M llvm/test/CodeGen/PowerPC/aix-small-local-dynamic-tls-largeaccess.ll
    M llvm/test/CodeGen/PowerPC/aix-small-local-dynamic-tls-types.ll
    M llvm/test/CodeGen/PowerPC/check-aix-small-local-exec-tls-opt-IRattribute.ll
    M llvm/test/CodeGen/PowerPC/check-aix-small-local-exec-tls-opt.ll

  Log Message:
  -----------
  [PowerPC][AIX] Enable aix-small-local-dynamic-tls target attribute (#86641)

Following the aix-small-local-exec-tls target attribute, this patch adds
a target attribute for an AIX-specific option in llc that informs the
compiler that it can use a faster access sequence for the local-dynamic
TLS model (formally named aix-small-local-dynamic-tls) when TLS
variables are less than ~32KB in size.

The patch either produces an addi/la with a displacement off of module
handle (return value from .__tls_get_mod) when the address is
calculated, or it produces an addi/la followed by a load/store when the
address is calculated and used for further accesses.

---------

Co-authored-by: Amy Kwan <amy.kwan1 at ibm.com>



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