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Merge commit 459e8e948 from llvm git (by Justin Hibbits):

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[PowerPC]: Don't allow r0 as a target for LD_GOT_TPREL_L/32

  Summary:
  The linker is free to relax this (relocation R_PPC_GOT_TPREL16)
  against R_PPC_TLS, if it sees fit (initial exec to local exec). If r0
  is used, this can generate execution-invalid code (converts to 'addi
  %rX, %r0, FOO, which translates in PPC-lingo to li %rX, FOO). Forbid
  this instead.

  This fixes static binaries using locales on FreeBSD/powerpc (tested
  on FreeBSD/powerpcspe).

  Reviewed By: nemanjai
  Differential Revision: https://reviews.llvm.org/D76662

Requested by:	jhibbits
MFC after:	6 weeks
X-MFC-With:	358851
This commit is contained in:
Dimitry Andric 2020-03-26 17:28:54 +00:00
parent 5b5f869e87
commit 6dce2be1c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=359334
2 changed files with 2 additions and 2 deletions
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2
contrib/llvm-project/llvm/lib/Target/PowerPC/PPCInstr64Bit.td
View File

@ -1110,7 +1110,7 @@ def ADDISgotTprelHA: PPCEmitTimePseudo<(outs g8rc:$rD), (ins g8rc_nox0:$reg, s16
(PPCaddisGotTprelHA i64:$reg,
tglobaltlsaddr:$disp))]>,
isPPC64;
def LDgotTprelL: PPCEmitTimePseudo<(outs g8rc:$rD), (ins s16imm64:$disp, g8rc_nox0:$reg),
def LDgotTprelL: PPCEmitTimePseudo<(outs g8rc_nox0:$rD), (ins s16imm64:$disp, g8rc_nox0:$reg),
"#LDgotTprelL",
[(set i64:$rD,
(PPCldGotTprelL tglobaltlsaddr:$disp, i64:$reg))]>,

2
contrib/llvm-project/llvm/lib/Target/PowerPC/PPCInstrInfo.td
View File

@ -3167,7 +3167,7 @@ def PPC32GOT: PPCEmitTimePseudo<(outs gprc:$rD), (ins), "#PPC32GOT",
def PPC32PICGOT: PPCEmitTimePseudo<(outs gprc:$rD, gprc:$rT), (ins), "#PPC32PICGOT",
[]>, NoEncode<"$rT">;
def LDgotTprelL32: PPCEmitTimePseudo<(outs gprc:$rD), (ins s16imm:$disp, gprc_nor0:$reg),
def LDgotTprelL32: PPCEmitTimePseudo<(outs gprc_nor0:$rD), (ins s16imm:$disp, gprc_nor0:$reg),
"#LDgotTprelL32",
[(set i32:$rD,
(PPCldGotTprelL tglobaltlsaddr:$disp, i32:$reg))]>;