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This patch implements local-dynamic TLS model support for the 64-bit

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PowerPC target.  This is the last of the four models, so we now have 
full TLS support.

This is mostly a straightforward extension of the general dynamic model.
I had to use an additional Chain operand to tie ADDIS_DTPREL_HA to the
register copy following ADDI_TLSLD_L; otherwise everything above the
ADDIS_DTPREL_HA appeared dead and was removed.

As before, there are new test cases to test the assembly generation, and
the relocations output during integrated assembly.  The expected code
gen sequence can be read in test/CodeGen/PowerPC/tls-ld.ll.

There are a couple of things I think can be done more efficiently in the
overall TLS code, so there will likely be a clean-up patch forthcoming;
but for now I want to be sure the functionality is in place.

Bill


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170003 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Schmidt
2012-12-12 19:29:35 +00:00
parent 1ce47acc1c
commit 349c2787cf
15 changed files with 331 additions and 19 deletions
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24
lib/Target/PowerPC/MCTargetDesc/PPCELFObjectWriter.cpp
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@@ -79,6 +79,9 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
case MCSymbolRefExpr::VK_PPC_TPREL16_HA:
Type = ELF::R_PPC_TPREL16_HA;
break;
case MCSymbolRefExpr::VK_PPC_DTPREL16_HA:
Type = ELF::R_PPC64_DTPREL16_HA;
break;
case MCSymbolRefExpr::VK_None:
Type = ELF::R_PPC_ADDR16_HA;
break;
@@ -88,6 +91,9 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
case MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_HA:
Type = ELF::R_PPC64_GOT_TLSGD16_HA;
break;
case MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_HA:
Type = ELF::R_PPC64_GOT_TLSLD16_HA;
break;
}
break;
case PPC::fixup_ppc_lo16:
@@ -96,6 +102,9 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
case MCSymbolRefExpr::VK_PPC_TPREL16_LO:
Type = ELF::R_PPC_TPREL16_LO;
break;
case MCSymbolRefExpr::VK_PPC_DTPREL16_LO:
Type = ELF::R_PPC64_DTPREL16_LO;
break;
case MCSymbolRefExpr::VK_None:
Type = ELF::R_PPC_ADDR16_LO;
break;
@@ -105,6 +114,9 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
case MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_LO:
Type = ELF::R_PPC64_GOT_TLSGD16_LO;
break;
case MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_LO:
Type = ELF::R_PPC64_GOT_TLSLD16_LO;
break;
}
break;
case PPC::fixup_ppc_lo14:
@@ -133,8 +145,16 @@ unsigned PPCELFObjectWriter::getRelocTypeInner(const MCValue &Target,
case PPC::fixup_ppc_tlsreg:
Type = ELF::R_PPC64_TLS;
break;
case PPC::fixup_ppc_tlsgd:
Type = ELF::R_PPC64_TLSGD;
case PPC::fixup_ppc_nofixup:
switch (Modifier) {
default: llvm_unreachable("Unsupported Modifier");
case MCSymbolRefExpr::VK_PPC_TLSGD:
Type = ELF::R_PPC64_TLSGD;
break;
case MCSymbolRefExpr::VK_PPC_TLSLD:
Type = ELF::R_PPC64_TLSLD;
break;
}
break;
case FK_Data_8:
switch (Modifier) {