lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp

   1 // CodeGen/RuntimeLibcallSignatures.cpp - R.T. Lib. Call Signatures -*- C++ -*--
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 ///
   9 /// \file
  10 /// This file contains signature information for runtime libcalls.
  11 ///
  12 /// CodeGen uses external symbols, which it refers to by name. The WebAssembly
  13 /// target needs type information for all functions. This file contains a big
  14 /// table providing type signatures for all runtime library functions that LLVM
  15 /// uses.
  16 ///
  17 /// This is currently a fairly heavy-handed solution.
  18 ///
  19 //===----------------------------------------------------------------------===//
  20
  21 #include "WebAssemblyRuntimeLibcallSignatures.h"
  22 #include "WebAssemblySubtarget.h"
  23 #include "llvm/CodeGen/RuntimeLibcalls.h"
  24 #include "llvm/Support/ManagedStatic.h"
  25
  26 using namespace llvm;
  27
  28 namespace {
  29
  30 enum RuntimeLibcallSignature {
  31   func,
  32   f32_func_f32,
  33   f32_func_f64,
  34   f32_func_i32,
  35   f32_func_i64,
  36   f32_func_i16,
  37   f64_func_f32,
  38   f64_func_f64,
  39   f64_func_i32,
  40   f64_func_i64,
  41   i32_func_f32,
  42   i32_func_f64,
  43   i32_func_i32,
  44   i64_func_f32,
  45   i64_func_f64,
  46   i64_func_i64,
  47   f32_func_f32_f32,
  48   f32_func_f32_i32,
  49   f32_func_i64_i64,
  50   f64_func_f64_f64,
  51   f64_func_f64_i32,
  52   f64_func_i64_i64,
  53   i16_func_f32,
  54   i16_func_f64,
  55   i16_func_i64_i64,
  56   i8_func_i8_i8,
  57   func_f32_iPTR_iPTR,
  58   func_f64_iPTR_iPTR,
  59   i16_func_i16_i16,
  60   i32_func_f32_f32,
  61   i32_func_f64_f64,
  62   i32_func_i32_i32,
  63   i32_func_i32_i32_iPTR,
  64   i64_func_i64_i64,
  65   i64_func_i64_i64_iPTR,
  66   i64_i64_func_f32,
  67   i64_i64_func_f64,
  68   i16_i16_func_i16_i16,
  69   i32_i32_func_i32_i32,
  70   i64_i64_func_i64_i64,
  71   i64_i64_func_i64_i64_i64_i64,
  72   i64_i64_func_i64_i64_i64_i64_iPTR,
  73   i64_i64_i64_i64_func_i64_i64_i64_i64,
  74   i64_i64_func_i64_i64_i32,
  75   iPTR_func_iPTR_i32_iPTR,
  76   iPTR_func_iPTR_iPTR_iPTR,
  77   f32_func_f32_f32_f32,
  78   f64_func_f64_f64_f64,
  79   func_i64_i64_iPTR_iPTR,
  80   func_iPTR_f32,
  81   func_iPTR_f64,
  82   func_iPTR_i32,
  83   func_iPTR_i64,
  84   func_iPTR_i64_i64,
  85   func_iPTR_i64_i64_i64_i64,
  86   func_iPTR_i64_i64_i64_i64_i64_i64,
  87   i32_func_i64_i64,
  88   i32_func_i64_i64_i64_i64,
  89   iPTR_func_f32,
  90   iPTR_func_f64,
  91   iPTR_func_i64_i64,
  92   unsupported
  93 };
  94
  95 struct RuntimeLibcallSignatureTable {
  96   std::vector<RuntimeLibcallSignature> Table;
  97
  98   // Any newly-added libcalls will be unsupported by default.
  99   RuntimeLibcallSignatureTable() : Table(RTLIB::UNKNOWN_LIBCALL, unsupported) {
 100     // Integer
 101     Table[RTLIB::SHL_I16] = i16_func_i16_i16;
 102     Table[RTLIB::SHL_I32] = i32_func_i32_i32;
 103     Table[RTLIB::SHL_I64] = i64_func_i64_i64;
 104     Table[RTLIB::SHL_I128] = i64_i64_func_i64_i64_i32;
 105     Table[RTLIB::SRL_I16] = i16_func_i16_i16;
 106     Table[RTLIB::SRL_I32] = i32_func_i32_i32;
 107     Table[RTLIB::SRL_I64] = i64_func_i64_i64;
 108     Table[RTLIB::SRL_I128] = i64_i64_func_i64_i64_i32;
 109     Table[RTLIB::SRA_I16] = i16_func_i16_i16;
 110     Table[RTLIB::SRA_I32] = i32_func_i32_i32;
 111     Table[RTLIB::SRA_I64] = i64_func_i64_i64;
 112     Table[RTLIB::SRA_I128] = i64_i64_func_i64_i64_i32;
 113     Table[RTLIB::MUL_I8] = i8_func_i8_i8;
 114     Table[RTLIB::MUL_I16] = i16_func_i16_i16;
 115     Table[RTLIB::MUL_I32] = i32_func_i32_i32;
 116     Table[RTLIB::MUL_I64] = i64_func_i64_i64;
 117     Table[RTLIB::MUL_I128] = i64_i64_func_i64_i64_i64_i64;
 118     Table[RTLIB::MULO_I32] = i32_func_i32_i32_iPTR;
 119     Table[RTLIB::MULO_I64] = i64_func_i64_i64_iPTR;
 120     Table[RTLIB::MULO_I128] = i64_i64_func_i64_i64_i64_i64_iPTR;
 121     Table[RTLIB::SDIV_I8] = i8_func_i8_i8;
 122     Table[RTLIB::SDIV_I16] = i16_func_i16_i16;
 123     Table[RTLIB::SDIV_I32] = i32_func_i32_i32;
 124     Table[RTLIB::SDIV_I64] = i64_func_i64_i64;
 125     Table[RTLIB::SDIV_I128] = i64_i64_func_i64_i64_i64_i64;
 126     Table[RTLIB::UDIV_I8] = i8_func_i8_i8;
 127     Table[RTLIB::UDIV_I16] = i16_func_i16_i16;
 128     Table[RTLIB::UDIV_I32] = i32_func_i32_i32;
 129     Table[RTLIB::UDIV_I64] = i64_func_i64_i64;
 130     Table[RTLIB::UDIV_I128] = i64_i64_func_i64_i64_i64_i64;
 131     Table[RTLIB::SREM_I8] = i8_func_i8_i8;
 132     Table[RTLIB::SREM_I16] = i16_func_i16_i16;
 133     Table[RTLIB::SREM_I32] = i32_func_i32_i32;
 134     Table[RTLIB::SREM_I64] = i64_func_i64_i64;
 135     Table[RTLIB::SREM_I128] = i64_i64_func_i64_i64_i64_i64;
 136     Table[RTLIB::UREM_I8] = i8_func_i8_i8;
 137     Table[RTLIB::UREM_I16] = i16_func_i16_i16;
 138     Table[RTLIB::UREM_I32] = i32_func_i32_i32;
 139     Table[RTLIB::UREM_I64] = i64_func_i64_i64;
 140     Table[RTLIB::UREM_I128] = i64_i64_func_i64_i64_i64_i64;
 141     Table[RTLIB::SDIVREM_I8] = i8_func_i8_i8;
 142     Table[RTLIB::SDIVREM_I16] = i16_i16_func_i16_i16;
 143     Table[RTLIB::SDIVREM_I32] = i32_i32_func_i32_i32;
 144     Table[RTLIB::SDIVREM_I64] = i64_func_i64_i64;
 145     Table[RTLIB::SDIVREM_I128] = i64_i64_i64_i64_func_i64_i64_i64_i64;
 146     Table[RTLIB::UDIVREM_I8] = i8_func_i8_i8;
 147     Table[RTLIB::UDIVREM_I16] = i16_i16_func_i16_i16;
 148     Table[RTLIB::UDIVREM_I32] = i32_i32_func_i32_i32;
 149     Table[RTLIB::UDIVREM_I64] = i64_i64_func_i64_i64;
 150     Table[RTLIB::UDIVREM_I128] = i64_i64_i64_i64_func_i64_i64_i64_i64;
 151     Table[RTLIB::NEG_I32] = i32_func_i32;
 152     Table[RTLIB::NEG_I64] = i64_func_i64;
 153
 154     // Floating-point.
 155     // All F80 and PPCF128 routines are unsupported.
 156     Table[RTLIB::ADD_F32] = f32_func_f32_f32;
 157     Table[RTLIB::ADD_F64] = f64_func_f64_f64;
 158     Table[RTLIB::ADD_F128] = func_iPTR_i64_i64_i64_i64;
 159     Table[RTLIB::SUB_F32] = f32_func_f32_f32;
 160     Table[RTLIB::SUB_F64] = f64_func_f64_f64;
 161     Table[RTLIB::SUB_F128] = func_iPTR_i64_i64_i64_i64;
 162     Table[RTLIB::MUL_F32] = f32_func_f32_f32;
 163     Table[RTLIB::MUL_F64] = f64_func_f64_f64;
 164     Table[RTLIB::MUL_F128] = func_iPTR_i64_i64_i64_i64;
 165     Table[RTLIB::DIV_F32] = f32_func_f32_f32;
 166     Table[RTLIB::DIV_F64] = f64_func_f64_f64;
 167     Table[RTLIB::DIV_F128] = func_iPTR_i64_i64_i64_i64;
 168     Table[RTLIB::REM_F32] = f32_func_f32_f32;
 169     Table[RTLIB::REM_F64] = f64_func_f64_f64;
 170     Table[RTLIB::REM_F128] = func_iPTR_i64_i64_i64_i64;
 171     Table[RTLIB::FMA_F32] = f32_func_f32_f32_f32;
 172     Table[RTLIB::FMA_F64] = f64_func_f64_f64_f64;
 173     Table[RTLIB::FMA_F128] = func_iPTR_i64_i64_i64_i64_i64_i64;
 174     Table[RTLIB::POWI_F32] = f32_func_f32_i32;
 175     Table[RTLIB::POWI_F64] = f64_func_f64_i32;
 176     Table[RTLIB::POWI_F128] = func_iPTR_i64_i64_i64_i64;
 177     Table[RTLIB::SQRT_F32] = f32_func_f32;
 178     Table[RTLIB::SQRT_F64] = f64_func_f64;
 179     Table[RTLIB::SQRT_F128] = func_iPTR_i64_i64;
 180     Table[RTLIB::LOG_F32] = f32_func_f32;
 181     Table[RTLIB::LOG_F64] = f64_func_f64;
 182     Table[RTLIB::LOG_F128] = func_iPTR_i64_i64;
 183     Table[RTLIB::LOG2_F32] = f32_func_f32;
 184     Table[RTLIB::LOG2_F64] = f64_func_f64;
 185     Table[RTLIB::LOG2_F128] = func_iPTR_i64_i64;
 186     Table[RTLIB::LOG10_F32] = f32_func_f32;
 187     Table[RTLIB::LOG10_F64] = f64_func_f64;
 188     Table[RTLIB::LOG10_F128] = func_iPTR_i64_i64;
 189     Table[RTLIB::EXP_F32] = f32_func_f32;
 190     Table[RTLIB::EXP_F64] = f64_func_f64;
 191     Table[RTLIB::EXP_F128] = func_iPTR_i64_i64;
 192     Table[RTLIB::EXP2_F32] = f32_func_f32;
 193     Table[RTLIB::EXP2_F64] = f64_func_f64;
 194     Table[RTLIB::EXP2_F128] = func_iPTR_i64_i64;
 195     Table[RTLIB::SIN_F32] = f32_func_f32;
 196     Table[RTLIB::SIN_F64] = f64_func_f64;
 197     Table[RTLIB::SIN_F128] = func_iPTR_i64_i64;
 198     Table[RTLIB::COS_F32] = f32_func_f32;
 199     Table[RTLIB::COS_F64] = f64_func_f64;
 200     Table[RTLIB::COS_F128] = func_iPTR_i64_i64;
 201     Table[RTLIB::SINCOS_F32] = func_f32_iPTR_iPTR;
 202     Table[RTLIB::SINCOS_F64] = func_f64_iPTR_iPTR;
 203     Table[RTLIB::SINCOS_F128] = func_i64_i64_iPTR_iPTR;
 204     Table[RTLIB::POW_F32] = f32_func_f32_f32;
 205     Table[RTLIB::POW_F64] = f64_func_f64_f64;
 206     Table[RTLIB::POW_F128] = func_iPTR_i64_i64_i64_i64;
 207     Table[RTLIB::CEIL_F32] = f32_func_f32;
 208     Table[RTLIB::CEIL_F64] = f64_func_f64;
 209     Table[RTLIB::CEIL_F128] = func_iPTR_i64_i64;
 210     Table[RTLIB::TRUNC_F32] = f32_func_f32;
 211     Table[RTLIB::TRUNC_F64] = f64_func_f64;
 212     Table[RTLIB::TRUNC_F128] = func_iPTR_i64_i64;
 213     Table[RTLIB::RINT_F32] = f32_func_f32;
 214     Table[RTLIB::RINT_F64] = f64_func_f64;
 215     Table[RTLIB::RINT_F128] = func_iPTR_i64_i64;
 216     Table[RTLIB::NEARBYINT_F32] = f32_func_f32;
 217     Table[RTLIB::NEARBYINT_F64] = f64_func_f64;
 218     Table[RTLIB::NEARBYINT_F128] = func_iPTR_i64_i64;
 219     Table[RTLIB::ROUND_F32] = f32_func_f32;
 220     Table[RTLIB::ROUND_F64] = f64_func_f64;
 221     Table[RTLIB::ROUND_F128] = func_iPTR_i64_i64;
 222     Table[RTLIB::LROUND_F32] = iPTR_func_f32;
 223     Table[RTLIB::LROUND_F64] = iPTR_func_f64;
 224     Table[RTLIB::LROUND_F128] = iPTR_func_i64_i64;
 225     Table[RTLIB::LLROUND_F32] = i64_func_f32;
 226     Table[RTLIB::LLROUND_F64] = i64_func_f64;
 227     Table[RTLIB::LLROUND_F128] = i64_func_i64_i64;
 228     Table[RTLIB::LRINT_F32] = iPTR_func_f32;
 229     Table[RTLIB::LRINT_F64] = iPTR_func_f64;
 230     Table[RTLIB::LRINT_F128] = iPTR_func_i64_i64;
 231     Table[RTLIB::LLRINT_F32] = i64_func_f32;
 232     Table[RTLIB::LLRINT_F64] = i64_func_f64;
 233     Table[RTLIB::LLRINT_F128] = i64_func_i64_i64;
 234     Table[RTLIB::FLOOR_F32] = f32_func_f32;
 235     Table[RTLIB::FLOOR_F64] = f64_func_f64;
 236     Table[RTLIB::FLOOR_F128] = func_iPTR_i64_i64;
 237     Table[RTLIB::COPYSIGN_F32] = f32_func_f32_f32;
 238     Table[RTLIB::COPYSIGN_F64] = f64_func_f64_f64;
 239     Table[RTLIB::COPYSIGN_F128] = func_iPTR_i64_i64_i64_i64;
 240     Table[RTLIB::FMIN_F32] = f32_func_f32_f32;
 241     Table[RTLIB::FMIN_F64] = f64_func_f64_f64;
 242     Table[RTLIB::FMIN_F128] = func_iPTR_i64_i64_i64_i64;
 243     Table[RTLIB::FMAX_F32] = f32_func_f32_f32;
 244     Table[RTLIB::FMAX_F64] = f64_func_f64_f64;
 245     Table[RTLIB::FMAX_F128] = func_iPTR_i64_i64_i64_i64;
 246
 247     // Conversion
 248     // All F80 and PPCF128 routines are unsupported.
 249     Table[RTLIB::FPEXT_F64_F128] = func_iPTR_f64;
 250     Table[RTLIB::FPEXT_F32_F128] = func_iPTR_f32;
 251     Table[RTLIB::FPEXT_F32_F64] = f64_func_f32;
 252     Table[RTLIB::FPEXT_F16_F32] = f32_func_i16;
 253     Table[RTLIB::FPROUND_F32_F16] = i16_func_f32;
 254     Table[RTLIB::FPROUND_F64_F16] = i16_func_f64;
 255     Table[RTLIB::FPROUND_F64_F32] = f32_func_f64;
 256     Table[RTLIB::FPROUND_F128_F16] = i16_func_i64_i64;
 257     Table[RTLIB::FPROUND_F128_F32] = f32_func_i64_i64;
 258     Table[RTLIB::FPROUND_F128_F64] = f64_func_i64_i64;
 259     Table[RTLIB::FPTOSINT_F32_I32] = i32_func_f32;
 260     Table[RTLIB::FPTOSINT_F32_I64] = i64_func_f32;
 261     Table[RTLIB::FPTOSINT_F32_I128] = i64_i64_func_f32;
 262     Table[RTLIB::FPTOSINT_F64_I32] = i32_func_f64;
 263     Table[RTLIB::FPTOSINT_F64_I64] = i64_func_f64;
 264     Table[RTLIB::FPTOSINT_F64_I128] = i64_i64_func_f64;
 265     Table[RTLIB::FPTOSINT_F128_I32] = i32_func_i64_i64;
 266     Table[RTLIB::FPTOSINT_F128_I64] = i64_func_i64_i64;
 267     Table[RTLIB::FPTOSINT_F128_I128] = i64_i64_func_i64_i64;
 268     Table[RTLIB::FPTOUINT_F32_I32] = i32_func_f32;
 269     Table[RTLIB::FPTOUINT_F32_I64] = i64_func_f32;
 270     Table[RTLIB::FPTOUINT_F32_I128] = i64_i64_func_f32;
 271     Table[RTLIB::FPTOUINT_F64_I32] = i32_func_f64;
 272     Table[RTLIB::FPTOUINT_F64_I64] = i64_func_f64;
 273     Table[RTLIB::FPTOUINT_F64_I128] = i64_i64_func_f64;
 274     Table[RTLIB::FPTOUINT_F128_I32] = i32_func_i64_i64;
 275     Table[RTLIB::FPTOUINT_F128_I64] = i64_func_i64_i64;
 276     Table[RTLIB::FPTOUINT_F128_I128] = i64_i64_func_i64_i64;
 277     Table[RTLIB::SINTTOFP_I32_F32] = f32_func_i32;
 278     Table[RTLIB::SINTTOFP_I32_F64] = f64_func_i32;
 279     Table[RTLIB::SINTTOFP_I32_F128] = func_iPTR_i32;
 280     Table[RTLIB::SINTTOFP_I64_F32] = f32_func_i64;
 281     Table[RTLIB::SINTTOFP_I64_F64] = f64_func_i64;
 282     Table[RTLIB::SINTTOFP_I64_F128] = func_iPTR_i64;
 283     Table[RTLIB::SINTTOFP_I128_F32] = f32_func_i64_i64;
 284     Table[RTLIB::SINTTOFP_I128_F64] = f64_func_i64_i64;
 285     Table[RTLIB::SINTTOFP_I128_F128] = func_iPTR_i64_i64;
 286     Table[RTLIB::UINTTOFP_I32_F32] = f32_func_i32;
 287     Table[RTLIB::UINTTOFP_I32_F64] = f64_func_i64;
 288     Table[RTLIB::UINTTOFP_I32_F128] = func_iPTR_i32;
 289     Table[RTLIB::UINTTOFP_I64_F32] = f32_func_i64;
 290     Table[RTLIB::UINTTOFP_I64_F64] = f64_func_i64;
 291     Table[RTLIB::UINTTOFP_I64_F128] = func_iPTR_i64;
 292     Table[RTLIB::UINTTOFP_I128_F32] = f32_func_i64_i64;
 293     Table[RTLIB::UINTTOFP_I128_F64] = f64_func_i64_i64;
 294     Table[RTLIB::UINTTOFP_I128_F128] = func_iPTR_i64_i64;
 295
 296     // Comparison
 297     // ALl F80 and PPCF128 routines are unsupported.
 298     Table[RTLIB::OEQ_F32] = i32_func_f32_f32;
 299     Table[RTLIB::OEQ_F64] = i32_func_f64_f64;
 300     Table[RTLIB::OEQ_F128] = i32_func_i64_i64_i64_i64;
 301     Table[RTLIB::UNE_F32] = i32_func_f32_f32;
 302     Table[RTLIB::UNE_F64] = i32_func_f64_f64;
 303     Table[RTLIB::UNE_F128] = i32_func_i64_i64_i64_i64;
 304     Table[RTLIB::OGE_F32] = i32_func_f32_f32;
 305     Table[RTLIB::OGE_F64] = i32_func_f64_f64;
 306     Table[RTLIB::OGE_F128] = i32_func_i64_i64_i64_i64;
 307     Table[RTLIB::OLT_F32] = i32_func_f32_f32;
 308     Table[RTLIB::OLT_F64] = i32_func_f64_f64;
 309     Table[RTLIB::OLT_F128] = i32_func_i64_i64_i64_i64;
 310     Table[RTLIB::OLE_F32] = i32_func_f32_f32;
 311     Table[RTLIB::OLE_F64] = i32_func_f64_f64;
 312     Table[RTLIB::OLE_F128] = i32_func_i64_i64_i64_i64;
 313     Table[RTLIB::OGT_F32] = i32_func_f32_f32;
 314     Table[RTLIB::OGT_F64] = i32_func_f64_f64;
 315     Table[RTLIB::OGT_F128] = i32_func_i64_i64_i64_i64;
 316     Table[RTLIB::UO_F32] = i32_func_f32_f32;
 317     Table[RTLIB::UO_F64] = i32_func_f64_f64;
 318     Table[RTLIB::UO_F128] = i32_func_i64_i64_i64_i64;
 319     // O_FXX has the weird property that it uses the same libcall name as UO_FXX
 320     // This breaks our name-based lookup. Fortunately only the UO family of
 321     // libcalls appears to be actually used.
 322     Table[RTLIB::O_F32] = unsupported;
 323     Table[RTLIB::O_F64] = unsupported;
 324     Table[RTLIB::O_F128] = unsupported;
 325
 326     // Memory
 327     Table[RTLIB::MEMCPY] = iPTR_func_iPTR_iPTR_iPTR;
 328     Table[RTLIB::MEMSET] = iPTR_func_iPTR_i32_iPTR;
 329     Table[RTLIB::MEMMOVE] = iPTR_func_iPTR_iPTR_iPTR;
 330
 331     // __stack_chk_fail
 332     Table[RTLIB::STACKPROTECTOR_CHECK_FAIL] = func;
 333
 334     // Return address handling
 335     Table[RTLIB::RETURN_ADDRESS] = i32_func_i32;
 336
 337     // Element-wise Atomic memory
 338     // TODO: Fix these when we implement atomic support
 339     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_1] = unsupported;
 340     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_2] = unsupported;
 341     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_4] = unsupported;
 342     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_8] = unsupported;
 343     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_16] = unsupported;
 344     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_1] = unsupported;
 345     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_2] = unsupported;
 346     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_4] = unsupported;
 347     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_8] = unsupported;
 348     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_16] = unsupported;
 349
 350     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_1] = unsupported;
 351     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_2] = unsupported;
 352     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_4] = unsupported;
 353     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_8] = unsupported;
 354     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_16] = unsupported;
 355
 356     // Atomic '__sync_*' libcalls.
 357     // TODO: Fix these when we implement atomic support
 358     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_1] = unsupported;
 359     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_2] = unsupported;
 360     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_4] = unsupported;
 361     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_8] = unsupported;
 362     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_16] = unsupported;
 363     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_1] = unsupported;
 364     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_2] = unsupported;
 365     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_4] = unsupported;
 366     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_8] = unsupported;
 367     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_16] = unsupported;
 368     Table[RTLIB::SYNC_FETCH_AND_ADD_1] = unsupported;
 369     Table[RTLIB::SYNC_FETCH_AND_ADD_2] = unsupported;
 370     Table[RTLIB::SYNC_FETCH_AND_ADD_4] = unsupported;
 371     Table[RTLIB::SYNC_FETCH_AND_ADD_8] = unsupported;
 372     Table[RTLIB::SYNC_FETCH_AND_ADD_16] = unsupported;
 373     Table[RTLIB::SYNC_FETCH_AND_SUB_1] = unsupported;
 374     Table[RTLIB::SYNC_FETCH_AND_SUB_2] = unsupported;
 375     Table[RTLIB::SYNC_FETCH_AND_SUB_4] = unsupported;
 376     Table[RTLIB::SYNC_FETCH_AND_SUB_8] = unsupported;
 377     Table[RTLIB::SYNC_FETCH_AND_SUB_16] = unsupported;
 378     Table[RTLIB::SYNC_FETCH_AND_AND_1] = unsupported;
 379     Table[RTLIB::SYNC_FETCH_AND_AND_2] = unsupported;
 380     Table[RTLIB::SYNC_FETCH_AND_AND_4] = unsupported;
 381     Table[RTLIB::SYNC_FETCH_AND_AND_8] = unsupported;
 382     Table[RTLIB::SYNC_FETCH_AND_AND_16] = unsupported;
 383     Table[RTLIB::SYNC_FETCH_AND_OR_1] = unsupported;
 384     Table[RTLIB::SYNC_FETCH_AND_OR_2] = unsupported;
 385     Table[RTLIB::SYNC_FETCH_AND_OR_4] = unsupported;
 386     Table[RTLIB::SYNC_FETCH_AND_OR_8] = unsupported;
 387     Table[RTLIB::SYNC_FETCH_AND_OR_16] = unsupported;
 388     Table[RTLIB::SYNC_FETCH_AND_XOR_1] = unsupported;
 389     Table[RTLIB::SYNC_FETCH_AND_XOR_2] = unsupported;
 390     Table[RTLIB::SYNC_FETCH_AND_XOR_4] = unsupported;
 391     Table[RTLIB::SYNC_FETCH_AND_XOR_8] = unsupported;
 392     Table[RTLIB::SYNC_FETCH_AND_XOR_16] = unsupported;
 393     Table[RTLIB::SYNC_FETCH_AND_NAND_1] = unsupported;
 394     Table[RTLIB::SYNC_FETCH_AND_NAND_2] = unsupported;
 395     Table[RTLIB::SYNC_FETCH_AND_NAND_4] = unsupported;
 396     Table[RTLIB::SYNC_FETCH_AND_NAND_8] = unsupported;
 397     Table[RTLIB::SYNC_FETCH_AND_NAND_16] = unsupported;
 398     Table[RTLIB::SYNC_FETCH_AND_MAX_1] = unsupported;
 399     Table[RTLIB::SYNC_FETCH_AND_MAX_2] = unsupported;
 400     Table[RTLIB::SYNC_FETCH_AND_MAX_4] = unsupported;
 401     Table[RTLIB::SYNC_FETCH_AND_MAX_8] = unsupported;
 402     Table[RTLIB::SYNC_FETCH_AND_MAX_16] = unsupported;
 403     Table[RTLIB::SYNC_FETCH_AND_UMAX_1] = unsupported;
 404     Table[RTLIB::SYNC_FETCH_AND_UMAX_2] = unsupported;
 405     Table[RTLIB::SYNC_FETCH_AND_UMAX_4] = unsupported;
 406     Table[RTLIB::SYNC_FETCH_AND_UMAX_8] = unsupported;
 407     Table[RTLIB::SYNC_FETCH_AND_UMAX_16] = unsupported;
 408     Table[RTLIB::SYNC_FETCH_AND_MIN_1] = unsupported;
 409     Table[RTLIB::SYNC_FETCH_AND_MIN_2] = unsupported;
 410     Table[RTLIB::SYNC_FETCH_AND_MIN_4] = unsupported;
 411     Table[RTLIB::SYNC_FETCH_AND_MIN_8] = unsupported;
 412     Table[RTLIB::SYNC_FETCH_AND_MIN_16] = unsupported;
 413     Table[RTLIB::SYNC_FETCH_AND_UMIN_1] = unsupported;
 414     Table[RTLIB::SYNC_FETCH_AND_UMIN_2] = unsupported;
 415     Table[RTLIB::SYNC_FETCH_AND_UMIN_4] = unsupported;
 416     Table[RTLIB::SYNC_FETCH_AND_UMIN_8] = unsupported;
 417     Table[RTLIB::SYNC_FETCH_AND_UMIN_16] = unsupported;
 418
 419     // Atomic '__atomic_*' libcalls.
 420     // TODO: Fix these when we implement atomic support
 421     Table[RTLIB::ATOMIC_LOAD] = unsupported;
 422     Table[RTLIB::ATOMIC_LOAD_1] = unsupported;
 423     Table[RTLIB::ATOMIC_LOAD_2] = unsupported;
 424     Table[RTLIB::ATOMIC_LOAD_4] = unsupported;
 425     Table[RTLIB::ATOMIC_LOAD_8] = unsupported;
 426     Table[RTLIB::ATOMIC_LOAD_16] = unsupported;
 427
 428     Table[RTLIB::ATOMIC_STORE] = unsupported;
 429     Table[RTLIB::ATOMIC_STORE_1] = unsupported;
 430     Table[RTLIB::ATOMIC_STORE_2] = unsupported;
 431     Table[RTLIB::ATOMIC_STORE_4] = unsupported;
 432     Table[RTLIB::ATOMIC_STORE_8] = unsupported;
 433     Table[RTLIB::ATOMIC_STORE_16] = unsupported;
 434
 435     Table[RTLIB::ATOMIC_EXCHANGE] = unsupported;
 436     Table[RTLIB::ATOMIC_EXCHANGE_1] = unsupported;
 437     Table[RTLIB::ATOMIC_EXCHANGE_2] = unsupported;
 438     Table[RTLIB::ATOMIC_EXCHANGE_4] = unsupported;
 439     Table[RTLIB::ATOMIC_EXCHANGE_8] = unsupported;
 440     Table[RTLIB::ATOMIC_EXCHANGE_16] = unsupported;
 441
 442     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE] = unsupported;
 443     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_1] = unsupported;
 444     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_2] = unsupported;
 445     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_4] = unsupported;
 446     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_8] = unsupported;
 447     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_16] = unsupported;
 448
 449     Table[RTLIB::ATOMIC_FETCH_ADD_1] = unsupported;
 450     Table[RTLIB::ATOMIC_FETCH_ADD_2] = unsupported;
 451     Table[RTLIB::ATOMIC_FETCH_ADD_4] = unsupported;
 452     Table[RTLIB::ATOMIC_FETCH_ADD_8] = unsupported;
 453     Table[RTLIB::ATOMIC_FETCH_ADD_16] = unsupported;
 454
 455     Table[RTLIB::ATOMIC_FETCH_SUB_1] = unsupported;
 456     Table[RTLIB::ATOMIC_FETCH_SUB_2] = unsupported;
 457     Table[RTLIB::ATOMIC_FETCH_SUB_4] = unsupported;
 458     Table[RTLIB::ATOMIC_FETCH_SUB_8] = unsupported;
 459     Table[RTLIB::ATOMIC_FETCH_SUB_16] = unsupported;
 460
 461     Table[RTLIB::ATOMIC_FETCH_AND_1] = unsupported;
 462     Table[RTLIB::ATOMIC_FETCH_AND_2] = unsupported;
 463     Table[RTLIB::ATOMIC_FETCH_AND_4] = unsupported;
 464     Table[RTLIB::ATOMIC_FETCH_AND_8] = unsupported;
 465     Table[RTLIB::ATOMIC_FETCH_AND_16] = unsupported;
 466
 467     Table[RTLIB::ATOMIC_FETCH_OR_1] = unsupported;
 468     Table[RTLIB::ATOMIC_FETCH_OR_2] = unsupported;
 469     Table[RTLIB::ATOMIC_FETCH_OR_4] = unsupported;
 470     Table[RTLIB::ATOMIC_FETCH_OR_8] = unsupported;
 471     Table[RTLIB::ATOMIC_FETCH_OR_16] = unsupported;
 472
 473     Table[RTLIB::ATOMIC_FETCH_XOR_1] = unsupported;
 474     Table[RTLIB::ATOMIC_FETCH_XOR_2] = unsupported;
 475     Table[RTLIB::ATOMIC_FETCH_XOR_4] = unsupported;
 476     Table[RTLIB::ATOMIC_FETCH_XOR_8] = unsupported;
 477     Table[RTLIB::ATOMIC_FETCH_XOR_16] = unsupported;
 478
 479     Table[RTLIB::ATOMIC_FETCH_NAND_1] = unsupported;
 480     Table[RTLIB::ATOMIC_FETCH_NAND_2] = unsupported;
 481     Table[RTLIB::ATOMIC_FETCH_NAND_4] = unsupported;
 482     Table[RTLIB::ATOMIC_FETCH_NAND_8] = unsupported;
 483     Table[RTLIB::ATOMIC_FETCH_NAND_16] = unsupported;
 484   }
 485 };
 486
 487 ManagedStatic<RuntimeLibcallSignatureTable> RuntimeLibcallSignatures;
 488
 489 // Maps libcall names to their RTLIB::Libcall number. Builds the map in a
 490 // constructor for use with ManagedStatic
 491 struct StaticLibcallNameMap {
 492   StringMap<RTLIB::Libcall> Map;
 493   StaticLibcallNameMap() {
 494     static const std::pair<const char *, RTLIB::Libcall> NameLibcalls[] = {
 495 #define HANDLE_LIBCALL(code, name) {(const char *)name, RTLIB::code},
 496 #include "llvm/IR/RuntimeLibcalls.def"
 497 #undef HANDLE_LIBCALL
 498     };
 499     for (const auto &NameLibcall : NameLibcalls) {
 500       if (NameLibcall.first != nullptr &&
 501           RuntimeLibcallSignatures->Table[NameLibcall.second] != unsupported) {
 502         assert(Map.find(NameLibcall.first) == Map.end() &&
 503                "duplicate libcall names in name map");
 504         Map[NameLibcall.first] = NameLibcall.second;
 505       }
 506     }
 507     // Override the __gnu_f2h_ieee/__gnu_h2f_ieee names so that the f32 name is
 508     // consistent with the f64 and f128 names.
 509     Map["__extendhfsf2"] = RTLIB::FPEXT_F16_F32;
 510     Map["__truncsfhf2"] = RTLIB::FPROUND_F32_F16;
 511
 512     Map["emscripten_return_address"] = RTLIB::RETURN_ADDRESS;
 513   }
 514 };
 515
 516 } // end anonymous namespace
 517
 518 void llvm::getLibcallSignature(const WebAssemblySubtarget &Subtarget,
 519                                RTLIB::Libcall LC,
 520                                SmallVectorImpl<wasm::ValType> &Rets,
 521                                SmallVectorImpl<wasm::ValType> &Params) {
 522   assert(Rets.empty());
 523   assert(Params.empty());
 524
 525   wasm::ValType PtrTy =
 526       Subtarget.hasAddr64() ? wasm::ValType::I64 : wasm::ValType::I32;
 527
 528   auto &Table = RuntimeLibcallSignatures->Table;
 529   switch (Table[LC]) {
 530   case func:
 531     break;
 532   case f32_func_f32:
 533     Rets.push_back(wasm::ValType::F32);
 534     Params.push_back(wasm::ValType::F32);
 535     break;
 536   case f32_func_f64:
 537     Rets.push_back(wasm::ValType::F32);
 538     Params.push_back(wasm::ValType::F64);
 539     break;
 540   case f32_func_i32:
 541     Rets.push_back(wasm::ValType::F32);
 542     Params.push_back(wasm::ValType::I32);
 543     break;
 544   case f32_func_i64:
 545     Rets.push_back(wasm::ValType::F32);
 546     Params.push_back(wasm::ValType::I64);
 547     break;
 548   case f32_func_i16:
 549     Rets.push_back(wasm::ValType::F32);
 550     Params.push_back(wasm::ValType::I32);
 551     break;
 552   case f64_func_f32:
 553     Rets.push_back(wasm::ValType::F64);
 554     Params.push_back(wasm::ValType::F32);
 555     break;
 556   case f64_func_f64:
 557     Rets.push_back(wasm::ValType::F64);
 558     Params.push_back(wasm::ValType::F64);
 559     break;
 560   case f64_func_i32:
 561     Rets.push_back(wasm::ValType::F64);
 562     Params.push_back(wasm::ValType::I32);
 563     break;
 564   case f64_func_i64:
 565     Rets.push_back(wasm::ValType::F64);
 566     Params.push_back(wasm::ValType::I64);
 567     break;
 568   case i32_func_f32:
 569     Rets.push_back(wasm::ValType::I32);
 570     Params.push_back(wasm::ValType::F32);
 571     break;
 572   case i32_func_f64:
 573     Rets.push_back(wasm::ValType::I32);
 574     Params.push_back(wasm::ValType::F64);
 575     break;
 576   case i32_func_i32:
 577     Rets.push_back(wasm::ValType::I32);
 578     Params.push_back(wasm::ValType::I32);
 579     break;
 580   case i64_func_f32:
 581     Rets.push_back(wasm::ValType::I64);
 582     Params.push_back(wasm::ValType::F32);
 583     break;
 584   case i64_func_f64:
 585     Rets.push_back(wasm::ValType::I64);
 586     Params.push_back(wasm::ValType::F64);
 587     break;
 588   case i64_func_i64:
 589     Rets.push_back(wasm::ValType::I64);
 590     Params.push_back(wasm::ValType::I64);
 591     break;
 592   case f32_func_f32_f32:
 593     Rets.push_back(wasm::ValType::F32);
 594     Params.push_back(wasm::ValType::F32);
 595     Params.push_back(wasm::ValType::F32);
 596     break;
 597   case f32_func_f32_i32:
 598     Rets.push_back(wasm::ValType::F32);
 599     Params.push_back(wasm::ValType::F32);
 600     Params.push_back(wasm::ValType::I32);
 601     break;
 602   case f32_func_i64_i64:
 603     Rets.push_back(wasm::ValType::F32);
 604     Params.push_back(wasm::ValType::I64);
 605     Params.push_back(wasm::ValType::I64);
 606     break;
 607   case f64_func_f64_f64:
 608     Rets.push_back(wasm::ValType::F64);
 609     Params.push_back(wasm::ValType::F64);
 610     Params.push_back(wasm::ValType::F64);
 611     break;
 612   case f64_func_f64_i32:
 613     Rets.push_back(wasm::ValType::F64);
 614     Params.push_back(wasm::ValType::F64);
 615     Params.push_back(wasm::ValType::I32);
 616     break;
 617   case f64_func_i64_i64:
 618     Rets.push_back(wasm::ValType::F64);
 619     Params.push_back(wasm::ValType::I64);
 620     Params.push_back(wasm::ValType::I64);
 621     break;
 622   case i16_func_f32:
 623     Rets.push_back(wasm::ValType::I32);
 624     Params.push_back(wasm::ValType::F32);
 625     break;
 626   case i16_func_f64:
 627     Rets.push_back(wasm::ValType::I32);
 628     Params.push_back(wasm::ValType::F64);
 629     break;
 630   case i16_func_i64_i64:
 631     Rets.push_back(wasm::ValType::I32);
 632     Params.push_back(wasm::ValType::I64);
 633     Params.push_back(wasm::ValType::I64);
 634     break;
 635   case i8_func_i8_i8:
 636     Rets.push_back(wasm::ValType::I32);
 637     Params.push_back(wasm::ValType::I32);
 638     Params.push_back(wasm::ValType::I32);
 639     break;
 640   case func_f32_iPTR_iPTR:
 641     Params.push_back(wasm::ValType::F32);
 642     Params.push_back(PtrTy);
 643     Params.push_back(PtrTy);
 644     break;
 645   case func_f64_iPTR_iPTR:
 646     Params.push_back(wasm::ValType::F64);
 647     Params.push_back(PtrTy);
 648     Params.push_back(PtrTy);
 649     break;
 650   case i16_func_i16_i16:
 651     Rets.push_back(wasm::ValType::I32);
 652     Params.push_back(wasm::ValType::I32);
 653     Params.push_back(wasm::ValType::I32);
 654     break;
 655   case i32_func_f32_f32:
 656     Rets.push_back(wasm::ValType::I32);
 657     Params.push_back(wasm::ValType::F32);
 658     Params.push_back(wasm::ValType::F32);
 659     break;
 660   case i32_func_f64_f64:
 661     Rets.push_back(wasm::ValType::I32);
 662     Params.push_back(wasm::ValType::F64);
 663     Params.push_back(wasm::ValType::F64);
 664     break;
 665   case i32_func_i32_i32:
 666     Rets.push_back(wasm::ValType::I32);
 667     Params.push_back(wasm::ValType::I32);
 668     Params.push_back(wasm::ValType::I32);
 669     break;
 670   case i32_func_i32_i32_iPTR:
 671     Rets.push_back(wasm::ValType::I32);
 672     Params.push_back(wasm::ValType::I32);
 673     Params.push_back(wasm::ValType::I32);
 674     Params.push_back(PtrTy);
 675     break;
 676   case i64_func_i64_i64:
 677     Rets.push_back(wasm::ValType::I64);
 678     Params.push_back(wasm::ValType::I64);
 679     Params.push_back(wasm::ValType::I64);
 680     break;
 681   case i64_func_i64_i64_iPTR:
 682     Rets.push_back(wasm::ValType::I64);
 683     Params.push_back(wasm::ValType::I64);
 684     Params.push_back(wasm::ValType::I64);
 685     Params.push_back(PtrTy);
 686     break;
 687   case i64_i64_func_f32:
 688 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 689     Rets.push_back(wasm::ValType::I64);
 690     Rets.push_back(wasm::ValType::I64);
 691 #else
 692     Params.push_back(PtrTy);
 693 #endif
 694     Params.push_back(wasm::ValType::F32);
 695     break;
 696   case i64_i64_func_f64:
 697 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 698     Rets.push_back(wasm::ValType::I64);
 699     Rets.push_back(wasm::ValType::I64);
 700 #else
 701     Params.push_back(PtrTy);
 702 #endif
 703     Params.push_back(wasm::ValType::F64);
 704     break;
 705   case i16_i16_func_i16_i16:
 706 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 707     Rets.push_back(wasm::ValType::I32);
 708     Rets.push_back(wasm::ValType::I32);
 709 #else
 710     Params.push_back(PtrTy);
 711 #endif
 712     Params.push_back(wasm::ValType::I32);
 713     Params.push_back(wasm::ValType::I32);
 714     break;
 715   case i32_i32_func_i32_i32:
 716 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 717     Rets.push_back(wasm::ValType::I32);
 718     Rets.push_back(wasm::ValType::I32);
 719 #else
 720     Params.push_back(PtrTy);
 721 #endif
 722     Params.push_back(wasm::ValType::I32);
 723     Params.push_back(wasm::ValType::I32);
 724     break;
 725   case i64_i64_func_i64_i64:
 726 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 727     Rets.push_back(wasm::ValType::I64);
 728     Rets.push_back(wasm::ValType::I64);
 729 #else
 730     Params.push_back(PtrTy);
 731 #endif
 732     Params.push_back(wasm::ValType::I64);
 733     Params.push_back(wasm::ValType::I64);
 734     break;
 735   case i64_i64_func_i64_i64_i64_i64:
 736 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 737     Rets.push_back(wasm::ValType::I64);
 738     Rets.push_back(wasm::ValType::I64);
 739 #else
 740     Params.push_back(PtrTy);
 741 #endif
 742     Params.push_back(wasm::ValType::I64);
 743     Params.push_back(wasm::ValType::I64);
 744     Params.push_back(wasm::ValType::I64);
 745     Params.push_back(wasm::ValType::I64);
 746     break;
 747   case i64_i64_func_i64_i64_i64_i64_iPTR:
 748 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 749     Rets.push_back(wasm::ValType::I64);
 750     Rets.push_back(wasm::ValType::I64);
 751 #else
 752     Params.push_back(PtrTy);
 753 #endif
 754     Params.push_back(wasm::ValType::I64);
 755     Params.push_back(wasm::ValType::I64);
 756     Params.push_back(wasm::ValType::I64);
 757     Params.push_back(wasm::ValType::I64);
 758     Params.push_back(PtrTy);
 759     break;
 760   case i64_i64_i64_i64_func_i64_i64_i64_i64:
 761 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 762     Rets.push_back(wasm::ValType::I64);
 763     Rets.push_back(wasm::ValType::I64);
 764     Rets.push_back(wasm::ValType::I64);
 765     Rets.push_back(wasm::ValType::I64);
 766 #else
 767     Params.push_back(PtrTy);
 768 #endif
 769     Params.push_back(wasm::ValType::I64);
 770     Params.push_back(wasm::ValType::I64);
 771     Params.push_back(wasm::ValType::I64);
 772     Params.push_back(wasm::ValType::I64);
 773     break;
 774   case i64_i64_func_i64_i64_i32:
 775 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 776     Rets.push_back(wasm::ValType::I64);
 777     Rets.push_back(wasm::ValType::I64);
 778     Rets.push_back(wasm::ValType::I64);
 779     Rets.push_back(wasm::ValType::I64);
 780 #else
 781     Params.push_back(PtrTy);
 782 #endif
 783     Params.push_back(wasm::ValType::I64);
 784     Params.push_back(wasm::ValType::I64);
 785     Params.push_back(wasm::ValType::I32);
 786     break;
 787   case iPTR_func_iPTR_i32_iPTR:
 788     Rets.push_back(PtrTy);
 789     Params.push_back(PtrTy);
 790     Params.push_back(wasm::ValType::I32);
 791     Params.push_back(PtrTy);
 792     break;
 793   case iPTR_func_iPTR_iPTR_iPTR:
 794     Rets.push_back(PtrTy);
 795     Params.push_back(PtrTy);
 796     Params.push_back(PtrTy);
 797     Params.push_back(PtrTy);
 798     break;
 799   case f32_func_f32_f32_f32:
 800     Rets.push_back(wasm::ValType::F32);
 801     Params.push_back(wasm::ValType::F32);
 802     Params.push_back(wasm::ValType::F32);
 803     Params.push_back(wasm::ValType::F32);
 804     break;
 805   case f64_func_f64_f64_f64:
 806     Rets.push_back(wasm::ValType::F64);
 807     Params.push_back(wasm::ValType::F64);
 808     Params.push_back(wasm::ValType::F64);
 809     Params.push_back(wasm::ValType::F64);
 810     break;
 811   case func_i64_i64_iPTR_iPTR:
 812     Params.push_back(wasm::ValType::I64);
 813     Params.push_back(wasm::ValType::I64);
 814     Params.push_back(PtrTy);
 815     Params.push_back(PtrTy);
 816     break;
 817   case func_iPTR_f32:
 818     Params.push_back(PtrTy);
 819     Params.push_back(wasm::ValType::F32);
 820     break;
 821   case func_iPTR_f64:
 822     Params.push_back(PtrTy);
 823     Params.push_back(wasm::ValType::F64);
 824     break;
 825   case func_iPTR_i32:
 826     Params.push_back(PtrTy);
 827     Params.push_back(wasm::ValType::I32);
 828     break;
 829   case func_iPTR_i64:
 830     Params.push_back(PtrTy);
 831     Params.push_back(wasm::ValType::I64);
 832     break;
 833   case func_iPTR_i64_i64:
 834     Params.push_back(PtrTy);
 835     Params.push_back(wasm::ValType::I64);
 836     Params.push_back(wasm::ValType::I64);
 837     break;
 838   case func_iPTR_i64_i64_i64_i64:
 839     Params.push_back(PtrTy);
 840     Params.push_back(wasm::ValType::I64);
 841     Params.push_back(wasm::ValType::I64);
 842     Params.push_back(wasm::ValType::I64);
 843     Params.push_back(wasm::ValType::I64);
 844     break;
 845   case func_iPTR_i64_i64_i64_i64_i64_i64:
 846     Params.push_back(PtrTy);
 847     Params.push_back(wasm::ValType::I64);
 848     Params.push_back(wasm::ValType::I64);
 849     Params.push_back(wasm::ValType::I64);
 850     Params.push_back(wasm::ValType::I64);
 851     Params.push_back(wasm::ValType::I64);
 852     Params.push_back(wasm::ValType::I64);
 853     break;
 854   case i32_func_i64_i64:
 855     Rets.push_back(wasm::ValType::I32);
 856     Params.push_back(wasm::ValType::I64);
 857     Params.push_back(wasm::ValType::I64);
 858     break;
 859   case i32_func_i64_i64_i64_i64:
 860     Rets.push_back(wasm::ValType::I32);
 861     Params.push_back(wasm::ValType::I64);
 862     Params.push_back(wasm::ValType::I64);
 863     Params.push_back(wasm::ValType::I64);
 864     Params.push_back(wasm::ValType::I64);
 865     break;
 866   case iPTR_func_f32:
 867     Rets.push_back(PtrTy);
 868     Params.push_back(wasm::ValType::F32);
 869     break;
 870   case iPTR_func_f64:
 871     Rets.push_back(PtrTy);
 872     Params.push_back(wasm::ValType::F64);
 873     break;
 874   case iPTR_func_i64_i64:
 875     Rets.push_back(PtrTy);
 876     Params.push_back(wasm::ValType::I64);
 877     Params.push_back(wasm::ValType::I64);
 878     break;
 879   case unsupported:
 880     llvm_unreachable("unsupported runtime library signature");
 881   }
 882 }
 883
 884 static ManagedStatic<StaticLibcallNameMap> LibcallNameMap;
 885 // TODO: If the RTLIB::Libcall-taking flavor of GetSignature remains unsed
 886 // other than here, just roll its logic into this version.
 887 void llvm::getLibcallSignature(const WebAssemblySubtarget &Subtarget,
 888                                const char *Name,
 889                                SmallVectorImpl<wasm::ValType> &Rets,
 890                                SmallVectorImpl<wasm::ValType> &Params) {
 891   auto &Map = LibcallNameMap->Map;
 892   auto Val = Map.find(Name);
 893 #ifndef NDEBUG
 894   if (Val == Map.end()) {
 895     auto message = std::string("unexpected runtime library name: ") + Name;
 896     llvm_unreachable(message.c_str());
 897   }
 898 #endif
 899   return getLibcallSignature(Subtarget, Val->second, Rets, Params);
 900 }