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| author | Hans Wennborg <hans@hanshq.net> | 2012-06-01 16:27:21 +0000 |
|---|---|---|
| committer | Hans Wennborg <hans@hanshq.net> | 2012-06-01 16:27:21 +0000 |
| commit | f0234fcbc9be9798c10dedc3e3c134b7afbc6511 (patch) | |
| tree | 58aa8ee7a2be4159fbbbfe5085f56ea7eee31b1e /lib/Target/X86/X86MCInstLower.cpp | |
| parent | 6bb5c0074dc4cede2ad8efd420ec91288f91b012 (diff) | |
| download | llvm-f0234fcbc9be9798c10dedc3e3c134b7afbc6511.tar.gz llvm-f0234fcbc9be9798c10dedc3e3c134b7afbc6511.tar.bz2 llvm-f0234fcbc9be9798c10dedc3e3c134b7afbc6511.tar.xz | |
Implement the local-dynamic TLS model for x86 (PR3985)
This implements codegen support for accesses to thread-local variables
using the local-dynamic model, and adds a clean-up pass so that the base
address for the TLS block can be re-used between local-dynamic access on
an execution path.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157818 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86MCInstLower.cpp')
| -rw-r--r-- | lib/Target/X86/X86MCInstLower.cpp | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/lib/Target/X86/X86MCInstLower.cpp b/lib/Target/X86/X86MCInstLower.cpp index 2f368b6a5a..9dc5c7035d 100644 --- a/lib/Target/X86/X86MCInstLower.cpp +++ b/lib/Target/X86/X86MCInstLower.cpp @@ -156,9 +156,12 @@ MCOperand X86MCInstLower::LowerSymbolOperand(const MachineOperand &MO, break; case X86II::MO_SECREL: RefKind = MCSymbolRefExpr::VK_SECREL; break; case X86II::MO_TLSGD: RefKind = MCSymbolRefExpr::VK_TLSGD; break; + case X86II::MO_TLSLD: RefKind = MCSymbolRefExpr::VK_TLSLD; break; + case X86II::MO_TLSLDM: RefKind = MCSymbolRefExpr::VK_TLSLDM; break; case X86II::MO_GOTTPOFF: RefKind = MCSymbolRefExpr::VK_GOTTPOFF; break; case X86II::MO_INDNTPOFF: RefKind = MCSymbolRefExpr::VK_INDNTPOFF; break; case X86II::MO_TPOFF: RefKind = MCSymbolRefExpr::VK_TPOFF; break; + case X86II::MO_DTPOFF: RefKind = MCSymbolRefExpr::VK_DTPOFF; break; case X86II::MO_NTPOFF: RefKind = MCSymbolRefExpr::VK_NTPOFF; break; case X86II::MO_GOTNTPOFF: RefKind = MCSymbolRefExpr::VK_GOTNTPOFF; break; case X86II::MO_GOTPCREL: RefKind = MCSymbolRefExpr::VK_GOTPCREL; break; @@ -551,17 +554,38 @@ ReSimplify: static void LowerTlsAddr(MCStreamer &OutStreamer, X86MCInstLower &MCInstLowering, const MachineInstr &MI) { - bool is64Bits = MI.getOpcode() == X86::TLS_addr64; + + bool is64Bits = MI.getOpcode() == X86::TLS_addr64 || + MI.getOpcode() == X86::TLS_base_addr64; + + bool needsPadding = MI.getOpcode() == X86::TLS_addr64; + MCContext &context = OutStreamer.getContext(); - if (is64Bits) { + if (needsPadding) { MCInst prefix; prefix.setOpcode(X86::DATA16_PREFIX); OutStreamer.EmitInstruction(prefix); } + + MCSymbolRefExpr::VariantKind SRVK; + switch (MI.getOpcode()) { + case X86::TLS_addr32: + case X86::TLS_addr64: + SRVK = MCSymbolRefExpr::VK_TLSGD; + break; + case X86::TLS_base_addr32: + SRVK = MCSymbolRefExpr::VK_TLSLDM; + break; + case X86::TLS_base_addr64: + SRVK = MCSymbolRefExpr::VK_TLSLD; + break; + default: + llvm_unreachable("unexpected opcode"); + } + MCSymbol *sym = MCInstLowering.GetSymbolFromOperand(MI.getOperand(3)); - const MCSymbolRefExpr *symRef = - MCSymbolRefExpr::Create(sym, MCSymbolRefExpr::VK_TLSGD, context); + const MCSymbolRefExpr *symRef = MCSymbolRefExpr::Create(sym, SRVK, context); MCInst LEA; if (is64Bits) { @@ -583,7 +607,7 @@ static void LowerTlsAddr(MCStreamer &OutStreamer, } OutStreamer.EmitInstruction(LEA); - if (is64Bits) { + if (needsPadding) { MCInst prefix; prefix.setOpcode(X86::DATA16_PREFIX); OutStreamer.EmitInstruction(prefix); @@ -645,6 +669,8 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) { case X86::TLS_addr32: case X86::TLS_addr64: + case X86::TLS_base_addr32: + case X86::TLS_base_addr64: return LowerTlsAddr(OutStreamer, MCInstLowering, *MI); case X86::MOVPC32r: { @@ -714,4 +740,3 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) { MCInstLowering.Lower(MI, TmpInst); OutStreamer.EmitInstruction(TmpInst); } - |