[llvm] 6205bfd - [𝘀𝗽𝗿] changes introduced through rebase
Jon Roelofs via llvm-commits
llvm-commits at lists.llvm.org
Wed Nov 29 08:23:36 PST 2023
Author: Jon Roelofs
Date: 2023-11-29T08:23:25-08:00
New Revision: 6205bfd3ab2c8d8ff0a5128a97c1b73d7967761c
URL: https://github.com/llvm/llvm-project/commit/6205bfd3ab2c8d8ff0a5128a97c1b73d7967761c
DIFF: https://github.com/llvm/llvm-project/commit/6205bfd3ab2c8d8ff0a5128a97c1b73d7967761c.diff
LOG: [𝘀𝗽𝗿] changes introduced through rebase
Created using spr 1.3.4
[skip ci]
Added:
Modified:
llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
llvm/lib/Target/X86/X86AsmPrinter.cpp
llvm/test/CodeGen/X86/ifunc-asm.ll
Removed:
################################################################################
diff --git a/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp b/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
index 26b3a14e22b2ad9..1b5b7c556c79f6b 100644
--- a/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
+++ b/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
@@ -1901,6 +1901,9 @@ void AArch64AsmPrinter::emitManualSymbolResolver(Module &M,
OutStreamer->switchSection(OutContext.getObjectFileInfo()->getDataSection());
+ // _ifunc.lazy_pointer:
+ // .quad _ifunc.stub_helper
+
EmitLinkage(LazyPointer);
OutStreamer->emitLabel(LazyPointer);
emitVisibility(LazyPointer, GI.getVisibility());
@@ -1908,18 +1911,18 @@ void AArch64AsmPrinter::emitManualSymbolResolver(Module &M,
OutStreamer->switchSection(OutContext.getObjectFileInfo()->getTextSection());
- MCSymbol *Stub = getSymbol(&GI);
+ // _ifunc:
+ // adrp x16, lazy_pointer at GOTPAGE
+ // ldr x16, [x16, lazy_pointer at GOTPAGEOFF]
+ // ldr x16, [x16]
+ // br x16
+ MCSymbol *Stub = getSymbol(&GI);
EmitLinkage(Stub);
OutStreamer->emitCodeAlignment(Align(4), STI);
OutStreamer->emitLabel(Stub);
emitVisibility(Stub, GI.getVisibility());
- // adrp x16, lazy_pointer at GOTPAGE
- // ldr x16, [x16, lazy_pointer at GOTPAGEOFF]
- // ldr x16, [x16]
- // br x16
-
{
MCInst Adrp;
Adrp.setOpcode(AArch64::ADRP);
@@ -1960,39 +1963,40 @@ void AArch64AsmPrinter::emitManualSymbolResolver(Module &M,
.addReg(AArch64::X16),
*STI);
+ // _ifunc.stub_helper:
+ // stp fp, lr, [sp, #-16]
+ // sub fp, sp, 16
+ // stp x1, x0, [sp, #-32]
+ // stp x3, x2, [sp, #-48]
+ // stp x5, x4, [sp, #-64]
+ // stp x7, x6, [sp, #-80]
+ // stp d1, d0, [sp, #-96]
+ // stp d3, d2, [sp, #-112]
+ // stp d5, d4, [sp, #-128]
+ // stp d7, d6, [sp, #-144]
+ // sub sp, sp, 144
+ // bl _resolver
+ // adrp x16, lazy_pointer at GOTPAGE
+ // ldr x16, [x16, lazy_pointer at GOTPAGEOFF]
+ // str x0, [x16]
+ // mov x16, x0
+ // add sp, sp, 144
+ // ldp d7, d6, [sp, #-144]
+ // ldp d5, d4, [sp, #-128]
+ // ldp d3, d2, [sp, #-112]
+ // ldp d1, d0, [sp, #-96]
+ // ldp x7, x6, [sp, #-80]
+ // ldp x5, x4, [sp, #-64]
+ // ldp x3, x2, [sp, #-48]
+ // ldp x1, x0, [sp, #-32]
+ // ldp fp, lr, [sp, #-16]
+ // br x16
+
EmitLinkage(StubHelper);
OutStreamer->emitCodeAlignment(Align(4), STI);
OutStreamer->emitLabel(StubHelper);
emitVisibility(StubHelper, GI.getVisibility());
- // stp fp, lr, [sp, #-16]
- // sub fp, sp, 16
- // stp x1, x0, [sp, #-32]
- // stp x3, x2, [sp, #-48]
- // stp x5, x4, [sp, #-64]
- // stp x7, x6, [sp, #-80]
- // stp d1, d0, [sp, #-96]
- // stp d3, d2, [sp, #-112]
- // stp d5, d4, [sp, #-128]
- // stp d7, d6, [sp, #-144]
- // sub sp, sp, 144
- // bl _resolver
- // adrp x16, lazy_pointer at GOTPAGE
- // ldr x16, [x16, lazy_pointer at GOTPAGEOFF]
- // str x0, [x16]
- // mov x16, x0
- // add sp, sp, 144
- // ldp d7, d6, [sp, #-144]
- // ldp d5, d4, [sp, #-128]
- // ldp d3, d2, [sp, #-112]
- // ldp d1, d0, [sp, #-96]
- // ldp x7, x6, [sp, #-80]
- // ldp x5, x4, [sp, #-64]
- // ldp x3, x2, [sp, #-48]
- // ldp x1, x0, [sp, #-32]
- // ldp fp, lr, [sp, #-16]
- // br x16
-
OutStreamer->emitInstruction(MCInstBuilder(AArch64::STPXi)
.addReg(AArch64::FP)
.addReg(AArch64::LR)
diff --git a/llvm/lib/Target/X86/X86AsmPrinter.cpp b/llvm/lib/Target/X86/X86AsmPrinter.cpp
index 37158900d2404dd..b0f4b9d98437284 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -14,6 +14,7 @@
#include "X86AsmPrinter.h"
#include "MCTargetDesc/X86ATTInstPrinter.h"
#include "MCTargetDesc/X86BaseInfo.h"
+#include "MCTargetDesc/X86MCTargetDesc.h"
#include "MCTargetDesc/X86TargetStreamer.h"
#include "TargetInfo/X86TargetInfo.h"
#include "X86InstrInfo.h"
@@ -34,6 +35,7 @@
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCSectionELF.h"
@@ -534,30 +536,112 @@ void X86AsmPrinter::emitGlobalIFunc(Module &M, const GlobalIFunc &GI) {
if (!TM.getTargetTriple().isOSBinFormatMachO())
return AsmPrinter::emitGlobalIFunc(M, GI);
- OutStreamer->switchSection(OutContext.getObjectFileInfo()->getTextSection());
+ auto EmitLinkage = [&](MCSymbol *Sym) {
+ if (GI.hasExternalLinkage() || !MAI->getWeakRefDirective())
+ OutStreamer->emitSymbolAttribute(Sym, MCSA_Global);
+ else if (GI.hasWeakLinkage() || GI.hasLinkOnceLinkage())
+ OutStreamer->emitSymbolAttribute(Sym, MCSA_WeakReference);
+ else
+ assert(GI.hasLocalLinkage() && "Invalid ifunc linkage");
+ };
- MCSymbol *Name = getSymbol(&GI);
+ MCSymbol *LazyPointer =
+ TM.getObjFileLowering()->getContext().getOrCreateSymbol(
+ "_" + GI.getName() + ".lazy_pointer");
+ MCSymbol *StubHelper =
+ TM.getObjFileLowering()->getContext().getOrCreateSymbol(
+ "_" + GI.getName() + ".stub_helper");
- if (GI.hasExternalLinkage() || !MAI->getWeakRefDirective())
- OutStreamer->emitSymbolAttribute(Name, MCSA_Global);
- else if (GI.hasWeakLinkage() || GI.hasLinkOnceLinkage())
- OutStreamer->emitSymbolAttribute(Name, MCSA_WeakReference);
- else
- assert(GI.hasLocalLinkage() && "Invalid ifunc linkage");
+ OutStreamer->switchSection(OutContext.getObjectFileInfo()->getDataSection());
+
+ // _ifunc.lazy_pointer:
+ // .quad _ifunc.stub_helper
+ EmitLinkage(LazyPointer);
+ OutStreamer->emitLabel(LazyPointer);
+ emitVisibility(LazyPointer, GI.getVisibility());
+ OutStreamer->emitValue(MCSymbolRefExpr::create(StubHelper, OutContext), 8);
+
+ OutStreamer->switchSection(OutContext.getObjectFileInfo()->getTextSection());
+
+ // _ifunc:
+ // jmpq *lazy_pointer(%rip)
+
+ MCSymbol *Stub = getSymbol(&GI);
+ EmitLinkage(Stub);
+ OutStreamer->emitCodeAlignment(Align(16), Subtarget);
+ OutStreamer->emitLabel(Stub);
+ emitVisibility(Stub, GI.getVisibility());
+
+ OutStreamer->emitInstruction(
+ MCInstBuilder(X86::JMP32m)
+ .addReg(X86::RIP)
+ .addImm(1)
+ .addReg(0)
+ .addOperand(MCOperand::createExpr(
+ MCSymbolRefExpr::create(LazyPointer, OutContext)))
+ .addReg(0),
+ *Subtarget);
+
+ // _ifunc.stub_helper:
+ // push %rax
+ // push %rdi
+ // push %rsi
+ // push %rdx
+ // push %rcx
+ // push %r8
+ // push %r9
+ // callq foo
+ // movq %rax,lazy_pointer(%rip)
+ // pop %r9
+ // pop %r8
+ // pop %rcx
+ // pop %rdx
+ // pop %rsi
+ // pop %rdi
+ // pop %rax
+ // jmpq *lazy_pointer(%rip)
+
+ EmitLinkage(StubHelper);
OutStreamer->emitCodeAlignment(Align(16), Subtarget);
- OutStreamer->emitLabel(Name);
- OutStreamer->emitSymbolAttribute(Name, MCSA_SymbolResolver);
- emitVisibility(Name, GI.getVisibility());
-
- // ld64 does not seem to support aliases of symbol resolvers, so we have to
- // tail call the resolver manually.
- MCInst JMP;
- JMP.setOpcode(X86::JMP_4);
- JMP.addOperand(MCOperand::createExpr(lowerConstant(GI.getResolver())));
- OutStreamer->emitInstruction(JMP, *Subtarget);
-
- // FIXME: do the manual .symbol_resolver lowering that we did in AArch64AsmPrinter.
+ OutStreamer->emitLabel(StubHelper);
+ emitVisibility(StubHelper, GI.getVisibility());
+
+ for (int Reg :
+ {X86::RAX, X86::RDI, X86::RSI, X86::RDX, X86::RCX, X86::R8, X86::R9})
+ OutStreamer->emitInstruction(MCInstBuilder(X86::PUSH64r).addReg(Reg),
+ *Subtarget);
+
+ OutStreamer->emitInstruction(
+ MCInstBuilder(X86::CALL64pcrel32)
+ .addOperand(MCOperand::createExpr(lowerConstant(GI.getResolver()))),
+ *Subtarget);
+
+ OutStreamer->emitInstruction(
+ MCInstBuilder(X86::MOV64mr)
+ .addReg(X86::RIP)
+ .addImm(1)
+ .addReg(0)
+ .addOperand(MCOperand::createExpr(
+ MCSymbolRefExpr::create(LazyPointer, OutContext)))
+ .addReg(0)
+ .addReg(X86::RAX),
+ *Subtarget);
+
+ for (int Reg :
+ {X86::R9, X86::R8, X86::RCX, X86::RDX, X86::RSI, X86::RDI, X86::RAX})
+ OutStreamer->emitInstruction(MCInstBuilder(X86::POP64r).addReg(Reg),
+ *Subtarget);
+
+ OutStreamer->emitInstruction(
+ MCInstBuilder(X86::JMP32m)
+ .addReg(X86::RIP)
+ .addImm(1)
+ .addReg(0)
+ .addOperand(MCOperand::createExpr(
+ MCSymbolRefExpr::create(LazyPointer, OutContext)))
+ .addReg(0),
+ *Subtarget);
}
static bool printAsmMRegister(const X86AsmPrinter &P, const MachineOperand &MO,
diff --git a/llvm/test/CodeGen/X86/ifunc-asm.ll b/llvm/test/CodeGen/X86/ifunc-asm.ll
index 76efda71153207d..0f66febbe95b2da 100644
--- a/llvm/test/CodeGen/X86/ifunc-asm.ll
+++ b/llvm/test/CodeGen/X86/ifunc-asm.ll
@@ -5,20 +5,44 @@ define internal ptr @foo_resolver() {
entry:
ret ptr null
}
-; ELF: .type foo_resolver, at function
-; ELF-NEXT: foo_resolver:
+; ELF: .type foo_resolver, at function
+; ELF-NEXT: foo_resolver:
-; MACHO: .p2align 4, 0x90
-; MACHO-NEXT: _foo_resolver
+; MACHO: .p2align 4, 0x90
+; MACHO-NEXT: _foo_resolver
@foo_ifunc = ifunc i32 (i32), ptr @foo_resolver
-; ELF: .globl foo_ifunc
-; ELF-NEXT: .type foo_ifunc, at gnu_indirect_function
-; ELF-NEXT: .set foo_ifunc, foo_resolver
+; ELF: .globl foo_ifunc
+; ELF-NEXT: .type foo_ifunc, at gnu_indirect_function
+; ELF-NEXT: .set foo_ifunc, foo_resolver
-; MACHO: .globl _foo_ifunc
-; MACHO-NEXT: .p2align 4, 0x90
-; MACHO-NEXT: _foo_ifunc:
-; MACHO-NEXT: .symbol_resolver _foo_ifunc
-; MACHO-NEXT: jmp _foo_resolver
+; MACHO: .section __DATA,__data
+; MACHO-NEXT: .globl _foo_ifunc.lazy_pointer
+; MACHO-NEXT: _foo_ifunc.lazy_pointer:
+; MACHO-NEXT: .quad _foo_ifunc.stub_helper
+; MACHO-NEXT: .section __TEXT,__text,regular,pure_instructions
+; MACHO-NEXT: .globl _foo_ifunc
+; MACHO-NEXT: .p2align 4, 0x90
+; MACHO-NEXT: _foo_ifunc:
+; MACHO-NEXT: jmpl *_foo_ifunc.lazy_pointer(%rip)
+; MACHO-NEXT: .globl _foo_ifunc.stub_helper
+; MACHO-NEXT: .p2align 4, 0x90
+; MACHO-NEXT: _foo_ifunc.stub_helper:
+; MACHO-NEXT: pushq %rax
+; MACHO-NEXT: pushq %rdi
+; MACHO-NEXT: pushq %rsi
+; MACHO-NEXT: pushq %rdx
+; MACHO-NEXT: pushq %rcx
+; MACHO-NEXT: pushq %r8
+; MACHO-NEXT: pushq %r9
+; MACHO-NEXT: callq _foo_resolver
+; MACHO-NEXT: movq %rax, _foo_ifunc.lazy_pointer(%rip)
+; MACHO-NEXT: popq %r9
+; MACHO-NEXT: popq %r8
+; MACHO-NEXT: popq %rcx
+; MACHO-NEXT: popq %rdx
+; MACHO-NEXT: popq %rsi
+; MACHO-NEXT: popq %rdi
+; MACHO-NEXT: popq %rax
+; MACHO-NEXT: jmpl *_foo_ifunc.lazy_pointer(%rip)
\ No newline at end of file
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