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Fix PR 4004 by including the call to __tls_get_addr in X86tlsaddr. This is not

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very elegant, but neither is the tls specification :-(



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69968 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2009-04-24 12:59:40 +00:00
parent 15684b2955
commit 15f1b66d64
4 changed files with 39 additions and 37 deletions
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40
lib/Target/X86/X86ISelLowering.cpp
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@ -4745,7 +4745,7 @@ X86TargetLowering::LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) {
static SDValue
GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
SDValue *InFlag) {
SDValue *InFlag, const MVT PtrVT, unsigned ReturnReg) {
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
DebugLoc dl = GA->getDebugLoc();
SDValue TGA = DAG.getTargetGlobalAddress(GA->getGlobal(),
@ -4753,11 +4753,13 @@ GetTLSADDR(SelectionDAG &DAG, SDValue Chain, GlobalAddressSDNode *GA,
GA->getOffset());
if (InFlag) {
SDValue Ops[] = { Chain, TGA, *InFlag };
return DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 3);
} else {
SDValue Ops[] = { Chain, TGA };
return DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
Chain = DAG.getNode(X86ISD::TLSADDR, dl, NodeTys, Ops, 2);
}
SDValue Flag = Chain.getValue(1);
return DAG.getCopyFromReg(Chain, dl, ReturnReg, PtrVT, Flag);
}
// Lower ISD::GlobalTLSAddress using the "general dynamic" model, 32 bit
@ -4772,42 +4774,14 @@ LowerToTLSGeneralDynamicModel32(GlobalAddressSDNode *GA, SelectionDAG &DAG,
PtrVT), InFlag);
InFlag = Chain.getValue(1);
Chain = GetTLSADDR(DAG, Chain, GA, &InFlag);
InFlag = Chain.getValue(1);
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
SDValue Ops1[] = { Chain,
DAG.getTargetExternalSymbol("___tls_get_addr",
PtrVT),
DAG.getRegister(X86::EAX, PtrVT),
DAG.getRegister(X86::EBX, PtrVT),
InFlag };
Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops1, 5);
InFlag = Chain.getValue(1);
return DAG.getCopyFromReg(Chain, dl, X86::EAX, PtrVT, InFlag);
return GetTLSADDR(DAG, Chain, GA, &InFlag, PtrVT, X86::EAX);
}
// Lower ISD::GlobalTLSAddress using the "general dynamic" model, 64 bit
static SDValue
LowerToTLSGeneralDynamicModel64(GlobalAddressSDNode *GA, SelectionDAG &DAG,
const MVT PtrVT) {
SDValue InFlag, Chain;
DebugLoc dl = GA->getDebugLoc(); // ? function entry point might be better
Chain = GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL);
InFlag = Chain.getValue(1);
SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Flag);
SDValue Ops1[] = { Chain,
DAG.getTargetExternalSymbol("__tls_get_addr",
PtrVT),
DAG.getRegister(X86::RDI, PtrVT),
InFlag };
Chain = DAG.getNode(X86ISD::CALL, dl, NodeTys, Ops1, 4);
InFlag = Chain.getValue(1);
return DAG.getCopyFromReg(Chain, dl, X86::RAX, PtrVT, InFlag);
return GetTLSADDR(DAG, DAG.getEntryNode(), GA, NULL, PtrVT, X86::RAX);
}
// Lower ISD::GlobalTLSAddress using the "initial exec" (for no-pic) or

12
lib/Target/X86/X86Instr64bit.td
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@ -1303,9 +1303,17 @@ def MOV64ri64i32 : Ii32<0xB8, AddRegFrm, (outs GR64:$dst), (ins i64i32imm:$src),
// Thread Local Storage Instructions
//===----------------------------------------------------------------------===//
let hasSideEffects = 1, Defs = [RDI] in
// All calls clobber the non-callee saved registers. RSP is marked as
// a use to prevent stack-pointer assignments that appear immediately
// before calls from potentially appearing dead.
let Defs = [RAX, RCX, RDX, RSI, RDI, R8, R9, R10, R11,
FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0, ST1,
MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, EFLAGS],
Uses = [RSP] in
def TLS_addr64 : I<0, Pseudo, (outs), (ins i64imm:$sym),
".byte\t0x66; leaq\t${sym:mem}(%rip), %rdi; .word\t0x6666; rex64",
".byte\t0x66; leaq\t${sym:mem}(%rip), %rdi; .word\t0x6666; rex64;call\t__tls_get_addr@PLT",
[(X86tlsaddr tglobaltlsaddr:$sym)]>,
Requires<[In64BitMode]>;

11
lib/Target/X86/X86InstrInfo.td
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@ -2977,9 +2977,16 @@ def MOV32r0 : I<0x31, MRMInitReg, (outs GR32:$dst), (ins),
// Thread Local Storage Instructions
//
let hasSideEffects = 1, Uses = [EBX], Defs = [EAX] in
// All calls clobber the non-callee saved registers. ESP is marked as
// a use to prevent stack-pointer assignments that appear immediately
// before calls from potentially appearing dead.
let Defs = [EAX, ECX, EDX, FP0, FP1, FP2, FP3, FP4, FP5, FP6, ST0,
MM0, MM1, MM2, MM3, MM4, MM5, MM6, MM7,
XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7,
XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15, EFLAGS],
Uses = [ESP, EBX] in
def TLS_addr32 : I<0, Pseudo, (outs), (ins i32imm:$sym),
"leal\t${sym:mem}(,%ebx,1), %eax",
"leal\t${sym:mem}(,%ebx,1), %eax; call\t___tls_get_addr@PLT",
[(X86tlsaddr tglobaltlsaddr:$sym)]>,
Requires<[In32BitMode]>;

13
test/CodeGen/X86/2009-04-24.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llvm-as < %s | llc -march=x86 -mtriple=i386-linux-gnu -regalloc=local -relocation-model=pic > %t
; RUN: grep {leal.*TLSGD.*___tls_get_addr} %t
; RUN: llvm-as < %s | llc -march=x86-64 -mtriple=x86_64-linux-gnu -regalloc=local -relocation-model=pic > %t2
; RUN: grep {leaq.*TLSGD.*__tls_get_addr} %t2
; PR/4004
@i = thread_local global i32 15
define i32 @f() {
entry:
%tmp1 = load i32* @i
ret i32 %tmp1
}