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ARM: Unconditionally set eabi libcall calling convs in RuntimeLibcalls #146083

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Merged
arsenm merged 3 commits into from
Jul 9, 2025
Merged

ARM: Unconditionally set eabi libcall calling convs in RuntimeLibcalls #146083

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1e5fe41
ARM: Unconditionally set eabi libcall calling convs in RuntimeLibcalls
arsenm Jun 23, 2025
5d8e2b2
Add missed __aeabi_idivmod and __aeabi_uidivmod cases
arsenm Jun 28, 2025
3e51d0b
Remove CC from other div table
arsenm Jun 28, 2025
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53 changes: 45 additions & 8 deletions llvm/lib/IR/RuntimeLibcalls.cpp
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -56,18 +56,15 @@ static void setARMLibcallNames(RuntimeLibcallsInfo &Info, const Triple &TT,
const struct {
const RTLIB::Libcall Op;
const RTLIB::LibcallImpl Impl;
const CallingConv::ID CC;
} LibraryCalls[] = {
{RTLIB::SDIVREM_I32, RTLIB::__aeabi_idivmod, CallingConv::ARM_AAPCS},
{RTLIB::SDIVREM_I64, RTLIB::__aeabi_ldivmod, CallingConv::ARM_AAPCS},
{RTLIB::UDIVREM_I32, RTLIB::__aeabi_uidivmod, CallingConv::ARM_AAPCS},
{RTLIB::UDIVREM_I64, RTLIB::__aeabi_uldivmod, CallingConv::ARM_AAPCS},
{RTLIB::SDIVREM_I32, RTLIB::__aeabi_idivmod},
{RTLIB::SDIVREM_I64, RTLIB::__aeabi_ldivmod},
{RTLIB::UDIVREM_I32, RTLIB::__aeabi_uidivmod},
{RTLIB::UDIVREM_I64, RTLIB::__aeabi_uldivmod},
};

for (const auto &LC : LibraryCalls) {
for (const auto &LC : LibraryCalls)
Info.setLibcallImpl(LC.Op, LC.Impl);
Info.setLibcallImplCallingConv(LC.Impl, LC.CC);
}
}
}

Expand Down Expand Up @@ -98,6 +95,46 @@ static void setARMLibcallNames(RuntimeLibcallsInfo &Info, const Triple &TT,
Info.setLibcallImpl(RTLIB::SDIVREM_I32, RTLIB::__divmodsi4);
Info.setLibcallImpl(RTLIB::UDIVREM_I32, RTLIB::__udivmodsi4);
}

static const RTLIB::LibcallImpl AAPCS_Libcalls[] = {
RTLIB::__aeabi_dadd, RTLIB::__aeabi_ddiv,
RTLIB::__aeabi_dmul, RTLIB::__aeabi_dsub,
RTLIB::__aeabi_dcmpeq__oeq, RTLIB::__aeabi_dcmpeq__une,
RTLIB::__aeabi_dcmplt, RTLIB::__aeabi_dcmple,
RTLIB::__aeabi_dcmpge, RTLIB::__aeabi_dcmpgt,
RTLIB::__aeabi_dcmpun, RTLIB::__aeabi_fadd,
RTLIB::__aeabi_fdiv, RTLIB::__aeabi_fmul,
RTLIB::__aeabi_fsub, RTLIB::__aeabi_fcmpeq__oeq,
RTLIB::__aeabi_fcmpeq__une, RTLIB::__aeabi_fcmplt,
RTLIB::__aeabi_fcmple, RTLIB::__aeabi_fcmpge,
RTLIB::__aeabi_fcmpgt, RTLIB::__aeabi_fcmpun,
RTLIB::__aeabi_d2iz, RTLIB::__aeabi_d2uiz,
RTLIB::__aeabi_d2lz, RTLIB::__aeabi_d2ulz,
RTLIB::__aeabi_f2iz, RTLIB::__aeabi_f2uiz,
RTLIB::__aeabi_f2lz, RTLIB::__aeabi_f2ulz,
RTLIB::__aeabi_d2f, RTLIB::__aeabi_d2h,
RTLIB::__aeabi_f2d, RTLIB::__aeabi_i2d,
RTLIB::__aeabi_ui2d, RTLIB::__aeabi_l2d,
RTLIB::__aeabi_ul2d, RTLIB::__aeabi_i2f,
RTLIB::__aeabi_ui2f, RTLIB::__aeabi_l2f,
RTLIB::__aeabi_ul2f, RTLIB::__aeabi_lmul,
RTLIB::__aeabi_llsl, RTLIB::__aeabi_llsr,
RTLIB::__aeabi_lasr, RTLIB::__aeabi_idiv__i8,
RTLIB::__aeabi_idiv__i16, RTLIB::__aeabi_idiv__i32,
RTLIB::__aeabi_idivmod, RTLIB::__aeabi_uidivmod,
RTLIB::__aeabi_ldivmod, RTLIB::__aeabi_uidiv__i8,
RTLIB::__aeabi_uidiv__i16, RTLIB::__aeabi_uidiv__i32,
RTLIB::__aeabi_uldivmod, RTLIB::__aeabi_f2h,
RTLIB::__aeabi_d2h, RTLIB::__aeabi_h2f,
RTLIB::__aeabi_memcpy, RTLIB::__aeabi_memmove,
RTLIB::__aeabi_memset, RTLIB::__aeabi_memcpy4,
RTLIB::__aeabi_memcpy8, RTLIB::__aeabi_memmove4,
RTLIB::__aeabi_memmove8, RTLIB::__aeabi_memset4,
RTLIB::__aeabi_memset8, RTLIB::__aeabi_memclr,
RTLIB::__aeabi_memclr4, RTLIB::__aeabi_memclr8};

for (RTLIB::LibcallImpl Impl : AAPCS_Libcalls)
Info.setLibcallImplCallingConv(Impl, CallingConv::ARM_AAPCS);
}

static void setLongDoubleIsF128Libm(RuntimeLibcallsInfo &Info,
Expand Down
159 changes: 71 additions & 88 deletions llvm/lib/Target/ARM/ARMISelLowering.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -578,9 +578,8 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM_,
};
// clang-format on

for (const auto &LC : LibraryCalls) {
for (const auto &LC : LibraryCalls)
setLibcallImpl(LC.Op, LC.Impl);
}
}
}

Expand All @@ -594,131 +593,117 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM_,
static const struct {
const RTLIB::Libcall Op;
const RTLIB::LibcallImpl Impl;
const CallingConv::ID CC;
} LibraryCalls[] = {
// Double-precision floating-point arithmetic helper functions
// RTABI chapter 4.1.2, Table 2
{ RTLIB::ADD_F64, RTLIB::__aeabi_dadd, CallingConv::ARM_AAPCS },
{ RTLIB::DIV_F64, RTLIB::__aeabi_ddiv, CallingConv::ARM_AAPCS },
{ RTLIB::MUL_F64, RTLIB::__aeabi_dmul, CallingConv::ARM_AAPCS },
{ RTLIB::SUB_F64, RTLIB::__aeabi_dsub, CallingConv::ARM_AAPCS },
{ RTLIB::ADD_F64, RTLIB::__aeabi_dadd },
{ RTLIB::DIV_F64, RTLIB::__aeabi_ddiv },
{ RTLIB::MUL_F64, RTLIB::__aeabi_dmul },
{ RTLIB::SUB_F64, RTLIB::__aeabi_dsub },

// Double-precision floating-point comparison helper functions
// RTABI chapter 4.1.2, Table 3
{ RTLIB::OEQ_F64, RTLIB::__aeabi_dcmpeq__oeq, CallingConv::ARM_AAPCS },
{ RTLIB::UNE_F64, RTLIB::__aeabi_dcmpeq__une, CallingConv::ARM_AAPCS },
{ RTLIB::OLT_F64, RTLIB::__aeabi_dcmplt, CallingConv::ARM_AAPCS },
{ RTLIB::OLE_F64, RTLIB::__aeabi_dcmple, CallingConv::ARM_AAPCS },
{ RTLIB::OGE_F64, RTLIB::__aeabi_dcmpge, CallingConv::ARM_AAPCS },
{ RTLIB::OGT_F64, RTLIB::__aeabi_dcmpgt, CallingConv::ARM_AAPCS },
{ RTLIB::UO_F64, RTLIB::__aeabi_dcmpun, CallingConv::ARM_AAPCS },
{ RTLIB::OEQ_F64, RTLIB::__aeabi_dcmpeq__oeq },
{ RTLIB::UNE_F64, RTLIB::__aeabi_dcmpeq__une },
{ RTLIB::OLT_F64, RTLIB::__aeabi_dcmplt },
{ RTLIB::OLE_F64, RTLIB::__aeabi_dcmple },
{ RTLIB::OGE_F64, RTLIB::__aeabi_dcmpge },
{ RTLIB::OGT_F64, RTLIB::__aeabi_dcmpgt },
{ RTLIB::UO_F64, RTLIB::__aeabi_dcmpun },

// Single-precision floating-point arithmetic helper functions
// RTABI chapter 4.1.2, Table 4
{ RTLIB::ADD_F32, RTLIB::__aeabi_fadd, CallingConv::ARM_AAPCS },
{ RTLIB::DIV_F32, RTLIB::__aeabi_fdiv, CallingConv::ARM_AAPCS },
{ RTLIB::MUL_F32, RTLIB::__aeabi_fmul, CallingConv::ARM_AAPCS },
{ RTLIB::SUB_F32, RTLIB::__aeabi_fsub, CallingConv::ARM_AAPCS },
{ RTLIB::ADD_F32, RTLIB::__aeabi_fadd },
{ RTLIB::DIV_F32, RTLIB::__aeabi_fdiv },
{ RTLIB::MUL_F32, RTLIB::__aeabi_fmul },
{ RTLIB::SUB_F32, RTLIB::__aeabi_fsub },

// Single-precision floating-point comparison helper functions
// RTABI chapter 4.1.2, Table 5
{ RTLIB::OEQ_F32, RTLIB::__aeabi_fcmpeq__oeq, CallingConv::ARM_AAPCS },
{ RTLIB::UNE_F32, RTLIB::__aeabi_fcmpeq__une, CallingConv::ARM_AAPCS },
{ RTLIB::OLT_F32, RTLIB::__aeabi_fcmplt, CallingConv::ARM_AAPCS},
{ RTLIB::OLE_F32, RTLIB::__aeabi_fcmple, CallingConv::ARM_AAPCS },
{ RTLIB::OGE_F32, RTLIB::__aeabi_fcmpge, CallingConv::ARM_AAPCS },
{ RTLIB::OGT_F32, RTLIB::__aeabi_fcmpgt, CallingConv::ARM_AAPCS },
{ RTLIB::UO_F32, RTLIB::__aeabi_fcmpun, CallingConv::ARM_AAPCS },
{ RTLIB::OEQ_F32, RTLIB::__aeabi_fcmpeq__oeq },
{ RTLIB::UNE_F32, RTLIB::__aeabi_fcmpeq__une },
{ RTLIB::OLT_F32, RTLIB::__aeabi_fcmplt},
{ RTLIB::OLE_F32, RTLIB::__aeabi_fcmple },
{ RTLIB::OGE_F32, RTLIB::__aeabi_fcmpge },
{ RTLIB::OGT_F32, RTLIB::__aeabi_fcmpgt },
{ RTLIB::UO_F32, RTLIB::__aeabi_fcmpun },

// Floating-point to integer conversions.
// RTABI chapter 4.1.2, Table 6
{ RTLIB::FPTOSINT_F64_I32, RTLIB::__aeabi_d2iz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOUINT_F64_I32, RTLIB::__aeabi_d2uiz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOSINT_F64_I64, RTLIB::__aeabi_d2lz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOUINT_F64_I64, RTLIB::__aeabi_d2ulz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOSINT_F32_I32, RTLIB::__aeabi_f2iz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOUINT_F32_I32, RTLIB::__aeabi_f2uiz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOSINT_F32_I64, RTLIB::__aeabi_f2lz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOUINT_F32_I64, RTLIB::__aeabi_f2ulz, CallingConv::ARM_AAPCS },
{ RTLIB::FPTOSINT_F64_I32, RTLIB::__aeabi_d2iz },
{ RTLIB::FPTOUINT_F64_I32, RTLIB::__aeabi_d2uiz },
{ RTLIB::FPTOSINT_F64_I64, RTLIB::__aeabi_d2lz },
{ RTLIB::FPTOUINT_F64_I64, RTLIB::__aeabi_d2ulz },
{ RTLIB::FPTOSINT_F32_I32, RTLIB::__aeabi_f2iz },
{ RTLIB::FPTOUINT_F32_I32, RTLIB::__aeabi_f2uiz },
{ RTLIB::FPTOSINT_F32_I64, RTLIB::__aeabi_f2lz },
{ RTLIB::FPTOUINT_F32_I64, RTLIB::__aeabi_f2ulz },

// Conversions between floating types.
// RTABI chapter 4.1.2, Table 7
{ RTLIB::FPROUND_F64_F32, RTLIB::__aeabi_d2f, CallingConv::ARM_AAPCS },
{ RTLIB::FPROUND_F64_F16, RTLIB::__aeabi_d2h, CallingConv::ARM_AAPCS },
{ RTLIB::FPEXT_F32_F64, RTLIB::__aeabi_f2d, CallingConv::ARM_AAPCS },
{ RTLIB::FPROUND_F64_F32, RTLIB::__aeabi_d2f },
{ RTLIB::FPROUND_F64_F16, RTLIB::__aeabi_d2h },
{ RTLIB::FPEXT_F32_F64, RTLIB::__aeabi_f2d },

// Integer to floating-point conversions.
// RTABI chapter 4.1.2, Table 8
{ RTLIB::SINTTOFP_I32_F64, RTLIB::__aeabi_i2d, CallingConv::ARM_AAPCS },
{ RTLIB::UINTTOFP_I32_F64, RTLIB::__aeabi_ui2d, CallingConv::ARM_AAPCS },
{ RTLIB::SINTTOFP_I64_F64, RTLIB::__aeabi_l2d, CallingConv::ARM_AAPCS },
{ RTLIB::UINTTOFP_I64_F64, RTLIB::__aeabi_ul2d, CallingConv::ARM_AAPCS },
{ RTLIB::SINTTOFP_I32_F32, RTLIB::__aeabi_i2f, CallingConv::ARM_AAPCS },
{ RTLIB::UINTTOFP_I32_F32, RTLIB::__aeabi_ui2f, CallingConv::ARM_AAPCS },
{ RTLIB::SINTTOFP_I64_F32, RTLIB::__aeabi_l2f, CallingConv::ARM_AAPCS },
{ RTLIB::UINTTOFP_I64_F32, RTLIB::__aeabi_ul2f, CallingConv::ARM_AAPCS },
{ RTLIB::SINTTOFP_I32_F64, RTLIB::__aeabi_i2d },
{ RTLIB::UINTTOFP_I32_F64, RTLIB::__aeabi_ui2d },
{ RTLIB::SINTTOFP_I64_F64, RTLIB::__aeabi_l2d },
{ RTLIB::UINTTOFP_I64_F64, RTLIB::__aeabi_ul2d },
{ RTLIB::SINTTOFP_I32_F32, RTLIB::__aeabi_i2f },
{ RTLIB::UINTTOFP_I32_F32, RTLIB::__aeabi_ui2f },
{ RTLIB::SINTTOFP_I64_F32, RTLIB::__aeabi_l2f },
{ RTLIB::UINTTOFP_I64_F32, RTLIB::__aeabi_ul2f },

// Long long helper functions
// RTABI chapter 4.2, Table 9
{ RTLIB::MUL_I64, RTLIB::__aeabi_lmul, CallingConv::ARM_AAPCS },
{ RTLIB::SHL_I64, RTLIB::__aeabi_llsl, CallingConv::ARM_AAPCS },
{ RTLIB::SRL_I64, RTLIB::__aeabi_llsr, CallingConv::ARM_AAPCS },
{ RTLIB::SRA_I64, RTLIB::__aeabi_lasr, CallingConv::ARM_AAPCS },
{ RTLIB::MUL_I64, RTLIB::__aeabi_lmul },
{ RTLIB::SHL_I64, RTLIB::__aeabi_llsl },
{ RTLIB::SRL_I64, RTLIB::__aeabi_llsr },
{ RTLIB::SRA_I64, RTLIB::__aeabi_lasr },

// Integer division functions
// RTABI chapter 4.3.1
{ RTLIB::SDIV_I8, RTLIB::__aeabi_idiv__i8, CallingConv::ARM_AAPCS },
{ RTLIB::SDIV_I16, RTLIB::__aeabi_idiv__i16, CallingConv::ARM_AAPCS },
{ RTLIB::SDIV_I32, RTLIB::__aeabi_idiv__i32, CallingConv::ARM_AAPCS },
{ RTLIB::SDIV_I64, RTLIB::__aeabi_ldivmod, CallingConv::ARM_AAPCS },
{ RTLIB::UDIV_I8, RTLIB::__aeabi_uidiv__i8, CallingConv::ARM_AAPCS },
{ RTLIB::UDIV_I16, RTLIB::__aeabi_uidiv__i16, CallingConv::ARM_AAPCS },
{ RTLIB::UDIV_I32, RTLIB::__aeabi_uidiv__i32, CallingConv::ARM_AAPCS },
{ RTLIB::UDIV_I64, RTLIB::__aeabi_uldivmod, CallingConv::ARM_AAPCS },
{ RTLIB::SDIV_I8, RTLIB::__aeabi_idiv__i8 },
{ RTLIB::SDIV_I16, RTLIB::__aeabi_idiv__i16 },
{ RTLIB::SDIV_I32, RTLIB::__aeabi_idiv__i32},
{ RTLIB::SDIV_I64, RTLIB::__aeabi_ldivmod },
{ RTLIB::UDIV_I8, RTLIB::__aeabi_uidiv__i8 },
{ RTLIB::UDIV_I16, RTLIB::__aeabi_uidiv__i16 },
{ RTLIB::UDIV_I32, RTLIB::__aeabi_uidiv__i32 },
{ RTLIB::UDIV_I64, RTLIB::__aeabi_uldivmod },
};
// clang-format on

for (const auto &LC : LibraryCalls) {
for (const auto &LC : LibraryCalls)
setLibcallImpl(LC.Op, LC.Impl);
setLibcallImplCallingConv(LC.Impl, LC.CC);
}

// EABI dependent RTLIB
if (TM.Options.EABIVersion == EABI::EABI4 ||
TM.Options.EABIVersion == EABI::EABI5) {
static const struct {
const RTLIB::Libcall Op;
const RTLIB::LibcallImpl Impl;
const CallingConv::ID CC;
} MemOpsLibraryCalls[] = {
// Memory operations
// RTABI chapter 4.3.4
{RTLIB::MEMCPY, RTLIB::__aeabi_memcpy, CallingConv::ARM_AAPCS},
{RTLIB::MEMMOVE, RTLIB::__aeabi_memmove, CallingConv::ARM_AAPCS},
{RTLIB::MEMSET, RTLIB::__aeabi_memset, CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMCPY4, RTLIB::__aeabi_memcpy4,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMCPY8, RTLIB::__aeabi_memcpy8,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMMOVE4, RTLIB::__aeabi_memmove4,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMMOVE8, RTLIB::__aeabi_memmove8,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMSET4, RTLIB::__aeabi_memset4,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMSET8, RTLIB::__aeabi_memset8,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMCLR, RTLIB::__aeabi_memclr, CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMCLR4, RTLIB::__aeabi_memclr4,
CallingConv::ARM_AAPCS},
{RTLIB::AEABI_MEMCLR8, RTLIB::__aeabi_memclr8,
CallingConv::ARM_AAPCS},
{RTLIB::MEMCPY, RTLIB::__aeabi_memcpy},
{RTLIB::MEMMOVE, RTLIB::__aeabi_memmove},
{RTLIB::MEMSET, RTLIB::__aeabi_memset},
{RTLIB::AEABI_MEMCPY4, RTLIB::__aeabi_memcpy4},
{RTLIB::AEABI_MEMCPY8, RTLIB::__aeabi_memcpy8},
{RTLIB::AEABI_MEMMOVE4, RTLIB::__aeabi_memmove4},
{RTLIB::AEABI_MEMMOVE8, RTLIB::__aeabi_memmove8},
{RTLIB::AEABI_MEMSET4, RTLIB::__aeabi_memset4},
{RTLIB::AEABI_MEMSET8, RTLIB::__aeabi_memset8},
{RTLIB::AEABI_MEMCLR, RTLIB::__aeabi_memclr},
{RTLIB::AEABI_MEMCLR4, RTLIB::__aeabi_memclr4},
{RTLIB::AEABI_MEMCLR8, RTLIB::__aeabi_memclr8},
};

for (const auto &LC : MemOpsLibraryCalls) {
for (const auto &LC : MemOpsLibraryCalls)
setLibcallImpl(LC.Op, LC.Impl);
setLibcallImplCallingConv(LC.Impl, LC.CC);
}
}
}

Expand Down Expand Up @@ -746,16 +731,14 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM_,
static const struct {
const RTLIB::Libcall Op;
const RTLIB::LibcallImpl Impl;
const CallingConv::ID CC;
} LibraryCalls[] = {
{RTLIB::FPROUND_F32_F16, RTLIB::__aeabi_f2h, CallingConv::ARM_AAPCS},
{RTLIB::FPROUND_F64_F16, RTLIB::__aeabi_d2h, CallingConv::ARM_AAPCS},
{RTLIB::FPEXT_F16_F32, RTLIB::__aeabi_h2f, CallingConv::ARM_AAPCS},
{RTLIB::FPROUND_F32_F16, RTLIB::__aeabi_f2h},
{RTLIB::FPROUND_F64_F16, RTLIB::__aeabi_d2h},
{RTLIB::FPEXT_F16_F32, RTLIB::__aeabi_h2f},
};

for (const auto &LC : LibraryCalls) {
setLibcallImpl(LC.Op, LC.Impl);
setLibcallImplCallingConv(LC.Impl, LC.CC);
}
} else if (!TT.isOSBinFormatMachO()) {
setLibcallImpl(RTLIB::FPROUND_F32_F16, RTLIB::__gnu_f2h_ieee);
Expand Down
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