llvm/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_i32,
  86   func_iPTR_i64_i64_i64_i64,
  87   func_iPTR_i64_i64_i64_i64_i64_i64,
  88   i32_func_i64_i64,
  89   i32_func_i64_i64_i64_i64,
  90   iPTR_func_f32,
  91   iPTR_func_f64,
  92   iPTR_func_i64_i64,
  93   unsupported
  94 };
  95
  96 struct RuntimeLibcallSignatureTable {
  97   std::vector<RuntimeLibcallSignature> Table;
  98
  99   // Any newly-added libcalls will be unsupported by default.
 100   RuntimeLibcallSignatureTable() : Table(RTLIB::UNKNOWN_LIBCALL, unsupported) {
 101     // Integer
 102     Table[RTLIB::SHL_I16] = i16_func_i16_i16;
 103     Table[RTLIB::SHL_I32] = i32_func_i32_i32;
 104     Table[RTLIB::SHL_I64] = i64_func_i64_i64;
 105     Table[RTLIB::SHL_I128] = i64_i64_func_i64_i64_i32;
 106     Table[RTLIB::SRL_I16] = i16_func_i16_i16;
 107     Table[RTLIB::SRL_I32] = i32_func_i32_i32;
 108     Table[RTLIB::SRL_I64] = i64_func_i64_i64;
 109     Table[RTLIB::SRL_I128] = i64_i64_func_i64_i64_i32;
 110     Table[RTLIB::SRA_I16] = i16_func_i16_i16;
 111     Table[RTLIB::SRA_I32] = i32_func_i32_i32;
 112     Table[RTLIB::SRA_I64] = i64_func_i64_i64;
 113     Table[RTLIB::SRA_I128] = i64_i64_func_i64_i64_i32;
 114     Table[RTLIB::MUL_I8] = i8_func_i8_i8;
 115     Table[RTLIB::MUL_I16] = i16_func_i16_i16;
 116     Table[RTLIB::MUL_I32] = i32_func_i32_i32;
 117     Table[RTLIB::MUL_I64] = i64_func_i64_i64;
 118     Table[RTLIB::MUL_I128] = i64_i64_func_i64_i64_i64_i64;
 119     Table[RTLIB::MULO_I32] = i32_func_i32_i32_iPTR;
 120     Table[RTLIB::MULO_I64] = i64_func_i64_i64_iPTR;
 121     Table[RTLIB::MULO_I128] = i64_i64_func_i64_i64_i64_i64_iPTR;
 122     Table[RTLIB::SDIV_I8] = i8_func_i8_i8;
 123     Table[RTLIB::SDIV_I16] = i16_func_i16_i16;
 124     Table[RTLIB::SDIV_I32] = i32_func_i32_i32;
 125     Table[RTLIB::SDIV_I64] = i64_func_i64_i64;
 126     Table[RTLIB::SDIV_I128] = i64_i64_func_i64_i64_i64_i64;
 127     Table[RTLIB::UDIV_I8] = i8_func_i8_i8;
 128     Table[RTLIB::UDIV_I16] = i16_func_i16_i16;
 129     Table[RTLIB::UDIV_I32] = i32_func_i32_i32;
 130     Table[RTLIB::UDIV_I64] = i64_func_i64_i64;
 131     Table[RTLIB::UDIV_I128] = i64_i64_func_i64_i64_i64_i64;
 132     Table[RTLIB::SREM_I8] = i8_func_i8_i8;
 133     Table[RTLIB::SREM_I16] = i16_func_i16_i16;
 134     Table[RTLIB::SREM_I32] = i32_func_i32_i32;
 135     Table[RTLIB::SREM_I64] = i64_func_i64_i64;
 136     Table[RTLIB::SREM_I128] = i64_i64_func_i64_i64_i64_i64;
 137     Table[RTLIB::UREM_I8] = i8_func_i8_i8;
 138     Table[RTLIB::UREM_I16] = i16_func_i16_i16;
 139     Table[RTLIB::UREM_I32] = i32_func_i32_i32;
 140     Table[RTLIB::UREM_I64] = i64_func_i64_i64;
 141     Table[RTLIB::UREM_I128] = i64_i64_func_i64_i64_i64_i64;
 142     Table[RTLIB::SDIVREM_I8] = i8_func_i8_i8;
 143     Table[RTLIB::SDIVREM_I16] = i16_i16_func_i16_i16;
 144     Table[RTLIB::SDIVREM_I32] = i32_i32_func_i32_i32;
 145     Table[RTLIB::SDIVREM_I64] = i64_func_i64_i64;
 146     Table[RTLIB::SDIVREM_I128] = i64_i64_i64_i64_func_i64_i64_i64_i64;
 147     Table[RTLIB::UDIVREM_I8] = i8_func_i8_i8;
 148     Table[RTLIB::UDIVREM_I16] = i16_i16_func_i16_i16;
 149     Table[RTLIB::UDIVREM_I32] = i32_i32_func_i32_i32;
 150     Table[RTLIB::UDIVREM_I64] = i64_i64_func_i64_i64;
 151     Table[RTLIB::UDIVREM_I128] = i64_i64_i64_i64_func_i64_i64_i64_i64;
 152     Table[RTLIB::NEG_I32] = i32_func_i32;
 153     Table[RTLIB::NEG_I64] = i64_func_i64;
 154
 155     // Floating-point.
 156     // All F80 and PPCF128 routines are unsupported.
 157     Table[RTLIB::ADD_F32] = f32_func_f32_f32;
 158     Table[RTLIB::ADD_F64] = f64_func_f64_f64;
 159     Table[RTLIB::ADD_F128] = func_iPTR_i64_i64_i64_i64;
 160     Table[RTLIB::SUB_F32] = f32_func_f32_f32;
 161     Table[RTLIB::SUB_F64] = f64_func_f64_f64;
 162     Table[RTLIB::SUB_F128] = func_iPTR_i64_i64_i64_i64;
 163     Table[RTLIB::MUL_F32] = f32_func_f32_f32;
 164     Table[RTLIB::MUL_F64] = f64_func_f64_f64;
 165     Table[RTLIB::MUL_F128] = func_iPTR_i64_i64_i64_i64;
 166     Table[RTLIB::DIV_F32] = f32_func_f32_f32;
 167     Table[RTLIB::DIV_F64] = f64_func_f64_f64;
 168     Table[RTLIB::DIV_F128] = func_iPTR_i64_i64_i64_i64;
 169     Table[RTLIB::REM_F32] = f32_func_f32_f32;
 170     Table[RTLIB::REM_F64] = f64_func_f64_f64;
 171     Table[RTLIB::REM_F128] = func_iPTR_i64_i64_i64_i64;
 172     Table[RTLIB::FMA_F32] = f32_func_f32_f32_f32;
 173     Table[RTLIB::FMA_F64] = f64_func_f64_f64_f64;
 174     Table[RTLIB::FMA_F128] = func_iPTR_i64_i64_i64_i64_i64_i64;
 175     Table[RTLIB::POWI_F32] = f32_func_f32_i32;
 176     Table[RTLIB::POWI_F64] = f64_func_f64_i32;
 177     Table[RTLIB::POWI_F128] = func_iPTR_i64_i64_i32;
 178     Table[RTLIB::SQRT_F32] = f32_func_f32;
 179     Table[RTLIB::SQRT_F64] = f64_func_f64;
 180     Table[RTLIB::SQRT_F128] = func_iPTR_i64_i64;
 181     Table[RTLIB::CBRT_F32] = f32_func_f32;
 182     Table[RTLIB::CBRT_F64] = f64_func_f64;
 183     Table[RTLIB::CBRT_F128] = func_iPTR_i64_i64;
 184     Table[RTLIB::LOG_F32] = f32_func_f32;
 185     Table[RTLIB::LOG_F64] = f64_func_f64;
 186     Table[RTLIB::LOG_F128] = func_iPTR_i64_i64;
 187     Table[RTLIB::LOG2_F32] = f32_func_f32;
 188     Table[RTLIB::LOG2_F64] = f64_func_f64;
 189     Table[RTLIB::LOG2_F128] = func_iPTR_i64_i64;
 190     Table[RTLIB::LOG10_F32] = f32_func_f32;
 191     Table[RTLIB::LOG10_F64] = f64_func_f64;
 192     Table[RTLIB::LOG10_F128] = func_iPTR_i64_i64;
 193     Table[RTLIB::EXP_F32] = f32_func_f32;
 194     Table[RTLIB::EXP_F64] = f64_func_f64;
 195     Table[RTLIB::EXP_F128] = func_iPTR_i64_i64;
 196     Table[RTLIB::EXP2_F32] = f32_func_f32;
 197     Table[RTLIB::EXP2_F64] = f64_func_f64;
 198     Table[RTLIB::EXP2_F128] = func_iPTR_i64_i64;
 199     Table[RTLIB::SIN_F32] = f32_func_f32;
 200     Table[RTLIB::SIN_F64] = f64_func_f64;
 201     Table[RTLIB::SIN_F128] = func_iPTR_i64_i64;
 202     Table[RTLIB::COS_F32] = f32_func_f32;
 203     Table[RTLIB::COS_F64] = f64_func_f64;
 204     Table[RTLIB::COS_F128] = func_iPTR_i64_i64;
 205     Table[RTLIB::SINCOS_F32] = func_f32_iPTR_iPTR;
 206     Table[RTLIB::SINCOS_F64] = func_f64_iPTR_iPTR;
 207     Table[RTLIB::SINCOS_F128] = func_i64_i64_iPTR_iPTR;
 208     Table[RTLIB::POW_F32] = f32_func_f32_f32;
 209     Table[RTLIB::POW_F64] = f64_func_f64_f64;
 210     Table[RTLIB::POW_F128] = func_iPTR_i64_i64_i64_i64;
 211     Table[RTLIB::CEIL_F32] = f32_func_f32;
 212     Table[RTLIB::CEIL_F64] = f64_func_f64;
 213     Table[RTLIB::CEIL_F128] = func_iPTR_i64_i64;
 214     Table[RTLIB::TRUNC_F32] = f32_func_f32;
 215     Table[RTLIB::TRUNC_F64] = f64_func_f64;
 216     Table[RTLIB::TRUNC_F128] = func_iPTR_i64_i64;
 217     Table[RTLIB::RINT_F32] = f32_func_f32;
 218     Table[RTLIB::RINT_F64] = f64_func_f64;
 219     Table[RTLIB::RINT_F128] = func_iPTR_i64_i64;
 220     Table[RTLIB::NEARBYINT_F32] = f32_func_f32;
 221     Table[RTLIB::NEARBYINT_F64] = f64_func_f64;
 222     Table[RTLIB::NEARBYINT_F128] = func_iPTR_i64_i64;
 223     Table[RTLIB::ROUND_F32] = f32_func_f32;
 224     Table[RTLIB::ROUND_F64] = f64_func_f64;
 225     Table[RTLIB::ROUND_F128] = func_iPTR_i64_i64;
 226     Table[RTLIB::LROUND_F32] = iPTR_func_f32;
 227     Table[RTLIB::LROUND_F64] = iPTR_func_f64;
 228     Table[RTLIB::LROUND_F128] = iPTR_func_i64_i64;
 229     Table[RTLIB::LLROUND_F32] = i64_func_f32;
 230     Table[RTLIB::LLROUND_F64] = i64_func_f64;
 231     Table[RTLIB::LLROUND_F128] = i64_func_i64_i64;
 232     Table[RTLIB::LRINT_F32] = iPTR_func_f32;
 233     Table[RTLIB::LRINT_F64] = iPTR_func_f64;
 234     Table[RTLIB::LRINT_F128] = iPTR_func_i64_i64;
 235     Table[RTLIB::LLRINT_F32] = i64_func_f32;
 236     Table[RTLIB::LLRINT_F64] = i64_func_f64;
 237     Table[RTLIB::LLRINT_F128] = i64_func_i64_i64;
 238     Table[RTLIB::FLOOR_F32] = f32_func_f32;
 239     Table[RTLIB::FLOOR_F64] = f64_func_f64;
 240     Table[RTLIB::FLOOR_F128] = func_iPTR_i64_i64;
 241     Table[RTLIB::COPYSIGN_F32] = f32_func_f32_f32;
 242     Table[RTLIB::COPYSIGN_F64] = f64_func_f64_f64;
 243     Table[RTLIB::COPYSIGN_F128] = func_iPTR_i64_i64_i64_i64;
 244     Table[RTLIB::FMIN_F32] = f32_func_f32_f32;
 245     Table[RTLIB::FMIN_F64] = f64_func_f64_f64;
 246     Table[RTLIB::FMIN_F128] = func_iPTR_i64_i64_i64_i64;
 247     Table[RTLIB::FMAX_F32] = f32_func_f32_f32;
 248     Table[RTLIB::FMAX_F64] = f64_func_f64_f64;
 249     Table[RTLIB::FMAX_F128] = func_iPTR_i64_i64_i64_i64;
 250
 251     // Conversion
 252     // All F80 and PPCF128 routines are unsupported.
 253     Table[RTLIB::FPEXT_F64_F128] = func_iPTR_f64;
 254     Table[RTLIB::FPEXT_F32_F128] = func_iPTR_f32;
 255     Table[RTLIB::FPEXT_F32_F64] = f64_func_f32;
 256     Table[RTLIB::FPEXT_F16_F32] = f32_func_i16;
 257     Table[RTLIB::FPROUND_F32_F16] = i16_func_f32;
 258     Table[RTLIB::FPROUND_F64_F16] = i16_func_f64;
 259     Table[RTLIB::FPROUND_F64_F32] = f32_func_f64;
 260     Table[RTLIB::FPROUND_F128_F16] = i16_func_i64_i64;
 261     Table[RTLIB::FPROUND_F128_F32] = f32_func_i64_i64;
 262     Table[RTLIB::FPROUND_F128_F64] = f64_func_i64_i64;
 263     Table[RTLIB::FPTOSINT_F32_I32] = i32_func_f32;
 264     Table[RTLIB::FPTOSINT_F32_I64] = i64_func_f32;
 265     Table[RTLIB::FPTOSINT_F32_I128] = i64_i64_func_f32;
 266     Table[RTLIB::FPTOSINT_F64_I32] = i32_func_f64;
 267     Table[RTLIB::FPTOSINT_F64_I64] = i64_func_f64;
 268     Table[RTLIB::FPTOSINT_F64_I128] = i64_i64_func_f64;
 269     Table[RTLIB::FPTOSINT_F128_I32] = i32_func_i64_i64;
 270     Table[RTLIB::FPTOSINT_F128_I64] = i64_func_i64_i64;
 271     Table[RTLIB::FPTOSINT_F128_I128] = i64_i64_func_i64_i64;
 272     Table[RTLIB::FPTOUINT_F32_I32] = i32_func_f32;
 273     Table[RTLIB::FPTOUINT_F32_I64] = i64_func_f32;
 274     Table[RTLIB::FPTOUINT_F32_I128] = i64_i64_func_f32;
 275     Table[RTLIB::FPTOUINT_F64_I32] = i32_func_f64;
 276     Table[RTLIB::FPTOUINT_F64_I64] = i64_func_f64;
 277     Table[RTLIB::FPTOUINT_F64_I128] = i64_i64_func_f64;
 278     Table[RTLIB::FPTOUINT_F128_I32] = i32_func_i64_i64;
 279     Table[RTLIB::FPTOUINT_F128_I64] = i64_func_i64_i64;
 280     Table[RTLIB::FPTOUINT_F128_I128] = i64_i64_func_i64_i64;
 281     Table[RTLIB::SINTTOFP_I32_F32] = f32_func_i32;
 282     Table[RTLIB::SINTTOFP_I32_F64] = f64_func_i32;
 283     Table[RTLIB::SINTTOFP_I32_F128] = func_iPTR_i32;
 284     Table[RTLIB::SINTTOFP_I64_F32] = f32_func_i64;
 285     Table[RTLIB::SINTTOFP_I64_F64] = f64_func_i64;
 286     Table[RTLIB::SINTTOFP_I64_F128] = func_iPTR_i64;
 287     Table[RTLIB::SINTTOFP_I128_F32] = f32_func_i64_i64;
 288     Table[RTLIB::SINTTOFP_I128_F64] = f64_func_i64_i64;
 289     Table[RTLIB::SINTTOFP_I128_F128] = func_iPTR_i64_i64;
 290     Table[RTLIB::UINTTOFP_I32_F32] = f32_func_i32;
 291     Table[RTLIB::UINTTOFP_I32_F64] = f64_func_i64;
 292     Table[RTLIB::UINTTOFP_I32_F128] = func_iPTR_i32;
 293     Table[RTLIB::UINTTOFP_I64_F32] = f32_func_i64;
 294     Table[RTLIB::UINTTOFP_I64_F64] = f64_func_i64;
 295     Table[RTLIB::UINTTOFP_I64_F128] = func_iPTR_i64;
 296     Table[RTLIB::UINTTOFP_I128_F32] = f32_func_i64_i64;
 297     Table[RTLIB::UINTTOFP_I128_F64] = f64_func_i64_i64;
 298     Table[RTLIB::UINTTOFP_I128_F128] = func_iPTR_i64_i64;
 299
 300     // Comparison
 301     // ALl F80 and PPCF128 routines are unsupported.
 302     Table[RTLIB::OEQ_F32] = i32_func_f32_f32;
 303     Table[RTLIB::OEQ_F64] = i32_func_f64_f64;
 304     Table[RTLIB::OEQ_F128] = i32_func_i64_i64_i64_i64;
 305     Table[RTLIB::UNE_F32] = i32_func_f32_f32;
 306     Table[RTLIB::UNE_F64] = i32_func_f64_f64;
 307     Table[RTLIB::UNE_F128] = i32_func_i64_i64_i64_i64;
 308     Table[RTLIB::OGE_F32] = i32_func_f32_f32;
 309     Table[RTLIB::OGE_F64] = i32_func_f64_f64;
 310     Table[RTLIB::OGE_F128] = i32_func_i64_i64_i64_i64;
 311     Table[RTLIB::OLT_F32] = i32_func_f32_f32;
 312     Table[RTLIB::OLT_F64] = i32_func_f64_f64;
 313     Table[RTLIB::OLT_F128] = i32_func_i64_i64_i64_i64;
 314     Table[RTLIB::OLE_F32] = i32_func_f32_f32;
 315     Table[RTLIB::OLE_F64] = i32_func_f64_f64;
 316     Table[RTLIB::OLE_F128] = i32_func_i64_i64_i64_i64;
 317     Table[RTLIB::OGT_F32] = i32_func_f32_f32;
 318     Table[RTLIB::OGT_F64] = i32_func_f64_f64;
 319     Table[RTLIB::OGT_F128] = i32_func_i64_i64_i64_i64;
 320     Table[RTLIB::UO_F32] = i32_func_f32_f32;
 321     Table[RTLIB::UO_F64] = i32_func_f64_f64;
 322     Table[RTLIB::UO_F128] = i32_func_i64_i64_i64_i64;
 323
 324     // Memory
 325     Table[RTLIB::MEMCPY] = iPTR_func_iPTR_iPTR_iPTR;
 326     Table[RTLIB::MEMSET] = iPTR_func_iPTR_i32_iPTR;
 327     Table[RTLIB::MEMMOVE] = iPTR_func_iPTR_iPTR_iPTR;
 328
 329     // __stack_chk_fail
 330     Table[RTLIB::STACKPROTECTOR_CHECK_FAIL] = func;
 331
 332     // Return address handling
 333     Table[RTLIB::RETURN_ADDRESS] = i32_func_i32;
 334
 335     // Element-wise Atomic memory
 336     // TODO: Fix these when we implement atomic support
 337     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_1] = unsupported;
 338     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_2] = unsupported;
 339     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_4] = unsupported;
 340     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_8] = unsupported;
 341     Table[RTLIB::MEMCPY_ELEMENT_UNORDERED_ATOMIC_16] = unsupported;
 342     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_1] = unsupported;
 343     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_2] = unsupported;
 344     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_4] = unsupported;
 345     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_8] = unsupported;
 346     Table[RTLIB::MEMMOVE_ELEMENT_UNORDERED_ATOMIC_16] = unsupported;
 347
 348     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_1] = unsupported;
 349     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_2] = unsupported;
 350     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_4] = unsupported;
 351     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_8] = unsupported;
 352     Table[RTLIB::MEMSET_ELEMENT_UNORDERED_ATOMIC_16] = unsupported;
 353
 354     // Atomic '__sync_*' libcalls.
 355     // TODO: Fix these when we implement atomic support
 356     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_1] = unsupported;
 357     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_2] = unsupported;
 358     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_4] = unsupported;
 359     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_8] = unsupported;
 360     Table[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_16] = unsupported;
 361     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_1] = unsupported;
 362     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_2] = unsupported;
 363     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_4] = unsupported;
 364     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_8] = unsupported;
 365     Table[RTLIB::SYNC_LOCK_TEST_AND_SET_16] = unsupported;
 366     Table[RTLIB::SYNC_FETCH_AND_ADD_1] = unsupported;
 367     Table[RTLIB::SYNC_FETCH_AND_ADD_2] = unsupported;
 368     Table[RTLIB::SYNC_FETCH_AND_ADD_4] = unsupported;
 369     Table[RTLIB::SYNC_FETCH_AND_ADD_8] = unsupported;
 370     Table[RTLIB::SYNC_FETCH_AND_ADD_16] = unsupported;
 371     Table[RTLIB::SYNC_FETCH_AND_SUB_1] = unsupported;
 372     Table[RTLIB::SYNC_FETCH_AND_SUB_2] = unsupported;
 373     Table[RTLIB::SYNC_FETCH_AND_SUB_4] = unsupported;
 374     Table[RTLIB::SYNC_FETCH_AND_SUB_8] = unsupported;
 375     Table[RTLIB::SYNC_FETCH_AND_SUB_16] = unsupported;
 376     Table[RTLIB::SYNC_FETCH_AND_AND_1] = unsupported;
 377     Table[RTLIB::SYNC_FETCH_AND_AND_2] = unsupported;
 378     Table[RTLIB::SYNC_FETCH_AND_AND_4] = unsupported;
 379     Table[RTLIB::SYNC_FETCH_AND_AND_8] = unsupported;
 380     Table[RTLIB::SYNC_FETCH_AND_AND_16] = unsupported;
 381     Table[RTLIB::SYNC_FETCH_AND_OR_1] = unsupported;
 382     Table[RTLIB::SYNC_FETCH_AND_OR_2] = unsupported;
 383     Table[RTLIB::SYNC_FETCH_AND_OR_4] = unsupported;
 384     Table[RTLIB::SYNC_FETCH_AND_OR_8] = unsupported;
 385     Table[RTLIB::SYNC_FETCH_AND_OR_16] = unsupported;
 386     Table[RTLIB::SYNC_FETCH_AND_XOR_1] = unsupported;
 387     Table[RTLIB::SYNC_FETCH_AND_XOR_2] = unsupported;
 388     Table[RTLIB::SYNC_FETCH_AND_XOR_4] = unsupported;
 389     Table[RTLIB::SYNC_FETCH_AND_XOR_8] = unsupported;
 390     Table[RTLIB::SYNC_FETCH_AND_XOR_16] = unsupported;
 391     Table[RTLIB::SYNC_FETCH_AND_NAND_1] = unsupported;
 392     Table[RTLIB::SYNC_FETCH_AND_NAND_2] = unsupported;
 393     Table[RTLIB::SYNC_FETCH_AND_NAND_4] = unsupported;
 394     Table[RTLIB::SYNC_FETCH_AND_NAND_8] = unsupported;
 395     Table[RTLIB::SYNC_FETCH_AND_NAND_16] = unsupported;
 396     Table[RTLIB::SYNC_FETCH_AND_MAX_1] = unsupported;
 397     Table[RTLIB::SYNC_FETCH_AND_MAX_2] = unsupported;
 398     Table[RTLIB::SYNC_FETCH_AND_MAX_4] = unsupported;
 399     Table[RTLIB::SYNC_FETCH_AND_MAX_8] = unsupported;
 400     Table[RTLIB::SYNC_FETCH_AND_MAX_16] = unsupported;
 401     Table[RTLIB::SYNC_FETCH_AND_UMAX_1] = unsupported;
 402     Table[RTLIB::SYNC_FETCH_AND_UMAX_2] = unsupported;
 403     Table[RTLIB::SYNC_FETCH_AND_UMAX_4] = unsupported;
 404     Table[RTLIB::SYNC_FETCH_AND_UMAX_8] = unsupported;
 405     Table[RTLIB::SYNC_FETCH_AND_UMAX_16] = unsupported;
 406     Table[RTLIB::SYNC_FETCH_AND_MIN_1] = unsupported;
 407     Table[RTLIB::SYNC_FETCH_AND_MIN_2] = unsupported;
 408     Table[RTLIB::SYNC_FETCH_AND_MIN_4] = unsupported;
 409     Table[RTLIB::SYNC_FETCH_AND_MIN_8] = unsupported;
 410     Table[RTLIB::SYNC_FETCH_AND_MIN_16] = unsupported;
 411     Table[RTLIB::SYNC_FETCH_AND_UMIN_1] = unsupported;
 412     Table[RTLIB::SYNC_FETCH_AND_UMIN_2] = unsupported;
 413     Table[RTLIB::SYNC_FETCH_AND_UMIN_4] = unsupported;
 414     Table[RTLIB::SYNC_FETCH_AND_UMIN_8] = unsupported;
 415     Table[RTLIB::SYNC_FETCH_AND_UMIN_16] = unsupported;
 416
 417     // Atomic '__atomic_*' libcalls.
 418     // TODO: Fix these when we implement atomic support
 419     Table[RTLIB::ATOMIC_LOAD] = unsupported;
 420     Table[RTLIB::ATOMIC_LOAD_1] = unsupported;
 421     Table[RTLIB::ATOMIC_LOAD_2] = unsupported;
 422     Table[RTLIB::ATOMIC_LOAD_4] = unsupported;
 423     Table[RTLIB::ATOMIC_LOAD_8] = unsupported;
 424     Table[RTLIB::ATOMIC_LOAD_16] = unsupported;
 425
 426     Table[RTLIB::ATOMIC_STORE] = unsupported;
 427     Table[RTLIB::ATOMIC_STORE_1] = unsupported;
 428     Table[RTLIB::ATOMIC_STORE_2] = unsupported;
 429     Table[RTLIB::ATOMIC_STORE_4] = unsupported;
 430     Table[RTLIB::ATOMIC_STORE_8] = unsupported;
 431     Table[RTLIB::ATOMIC_STORE_16] = unsupported;
 432
 433     Table[RTLIB::ATOMIC_EXCHANGE] = unsupported;
 434     Table[RTLIB::ATOMIC_EXCHANGE_1] = unsupported;
 435     Table[RTLIB::ATOMIC_EXCHANGE_2] = unsupported;
 436     Table[RTLIB::ATOMIC_EXCHANGE_4] = unsupported;
 437     Table[RTLIB::ATOMIC_EXCHANGE_8] = unsupported;
 438     Table[RTLIB::ATOMIC_EXCHANGE_16] = unsupported;
 439
 440     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE] = unsupported;
 441     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_1] = unsupported;
 442     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_2] = unsupported;
 443     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_4] = unsupported;
 444     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_8] = unsupported;
 445     Table[RTLIB::ATOMIC_COMPARE_EXCHANGE_16] = unsupported;
 446
 447     Table[RTLIB::ATOMIC_FETCH_ADD_1] = unsupported;
 448     Table[RTLIB::ATOMIC_FETCH_ADD_2] = unsupported;
 449     Table[RTLIB::ATOMIC_FETCH_ADD_4] = unsupported;
 450     Table[RTLIB::ATOMIC_FETCH_ADD_8] = unsupported;
 451     Table[RTLIB::ATOMIC_FETCH_ADD_16] = unsupported;
 452
 453     Table[RTLIB::ATOMIC_FETCH_SUB_1] = unsupported;
 454     Table[RTLIB::ATOMIC_FETCH_SUB_2] = unsupported;
 455     Table[RTLIB::ATOMIC_FETCH_SUB_4] = unsupported;
 456     Table[RTLIB::ATOMIC_FETCH_SUB_8] = unsupported;
 457     Table[RTLIB::ATOMIC_FETCH_SUB_16] = unsupported;
 458
 459     Table[RTLIB::ATOMIC_FETCH_AND_1] = unsupported;
 460     Table[RTLIB::ATOMIC_FETCH_AND_2] = unsupported;
 461     Table[RTLIB::ATOMIC_FETCH_AND_4] = unsupported;
 462     Table[RTLIB::ATOMIC_FETCH_AND_8] = unsupported;
 463     Table[RTLIB::ATOMIC_FETCH_AND_16] = unsupported;
 464
 465     Table[RTLIB::ATOMIC_FETCH_OR_1] = unsupported;
 466     Table[RTLIB::ATOMIC_FETCH_OR_2] = unsupported;
 467     Table[RTLIB::ATOMIC_FETCH_OR_4] = unsupported;
 468     Table[RTLIB::ATOMIC_FETCH_OR_8] = unsupported;
 469     Table[RTLIB::ATOMIC_FETCH_OR_16] = unsupported;
 470
 471     Table[RTLIB::ATOMIC_FETCH_XOR_1] = unsupported;
 472     Table[RTLIB::ATOMIC_FETCH_XOR_2] = unsupported;
 473     Table[RTLIB::ATOMIC_FETCH_XOR_4] = unsupported;
 474     Table[RTLIB::ATOMIC_FETCH_XOR_8] = unsupported;
 475     Table[RTLIB::ATOMIC_FETCH_XOR_16] = unsupported;
 476
 477     Table[RTLIB::ATOMIC_FETCH_NAND_1] = unsupported;
 478     Table[RTLIB::ATOMIC_FETCH_NAND_2] = unsupported;
 479     Table[RTLIB::ATOMIC_FETCH_NAND_4] = unsupported;
 480     Table[RTLIB::ATOMIC_FETCH_NAND_8] = unsupported;
 481     Table[RTLIB::ATOMIC_FETCH_NAND_16] = unsupported;
 482   }
 483 };
 484
 485 ManagedStatic<RuntimeLibcallSignatureTable> RuntimeLibcallSignatures;
 486
 487 // Maps libcall names to their RTLIB::Libcall number. Builds the map in a
 488 // constructor for use with ManagedStatic
 489 struct StaticLibcallNameMap {
 490   StringMap<RTLIB::Libcall> Map;
 491   StaticLibcallNameMap() {
 492     static const std::pair<const char *, RTLIB::Libcall> NameLibcalls[] = {
 493 #define HANDLE_LIBCALL(code, name) {(const char *)name, RTLIB::code},
 494 #include "llvm/IR/RuntimeLibcalls.def"
 495 #undef HANDLE_LIBCALL
 496     };
 497     for (const auto &NameLibcall : NameLibcalls) {
 498       if (NameLibcall.first != nullptr &&
 499           RuntimeLibcallSignatures->Table[NameLibcall.second] != unsupported) {
 500         assert(Map.find(NameLibcall.first) == Map.end() &&
 501                "duplicate libcall names in name map");
 502         Map[NameLibcall.first] = NameLibcall.second;
 503       }
 504     }
 505     // Override the __gnu_f2h_ieee/__gnu_h2f_ieee names so that the f32 name is
 506     // consistent with the f64 and f128 names.
 507     Map["__extendhfsf2"] = RTLIB::FPEXT_F16_F32;
 508     Map["__truncsfhf2"] = RTLIB::FPROUND_F32_F16;
 509
 510     Map["emscripten_return_address"] = RTLIB::RETURN_ADDRESS;
 511   }
 512 };
 513
 514 } // end anonymous namespace
 515
 516 void llvm::getLibcallSignature(const WebAssemblySubtarget &Subtarget,
 517                                RTLIB::Libcall LC,
 518                                SmallVectorImpl<wasm::ValType> &Rets,
 519                                SmallVectorImpl<wasm::ValType> &Params) {
 520   assert(Rets.empty());
 521   assert(Params.empty());
 522
 523   wasm::ValType PtrTy =
 524       Subtarget.hasAddr64() ? wasm::ValType::I64 : wasm::ValType::I32;
 525
 526   auto &Table = RuntimeLibcallSignatures->Table;
 527   switch (Table[LC]) {
 528   case func:
 529     break;
 530   case f32_func_f32:
 531     Rets.push_back(wasm::ValType::F32);
 532     Params.push_back(wasm::ValType::F32);
 533     break;
 534   case f32_func_f64:
 535     Rets.push_back(wasm::ValType::F32);
 536     Params.push_back(wasm::ValType::F64);
 537     break;
 538   case f32_func_i32:
 539     Rets.push_back(wasm::ValType::F32);
 540     Params.push_back(wasm::ValType::I32);
 541     break;
 542   case f32_func_i64:
 543     Rets.push_back(wasm::ValType::F32);
 544     Params.push_back(wasm::ValType::I64);
 545     break;
 546   case f32_func_i16:
 547     Rets.push_back(wasm::ValType::F32);
 548     Params.push_back(wasm::ValType::I32);
 549     break;
 550   case f64_func_f32:
 551     Rets.push_back(wasm::ValType::F64);
 552     Params.push_back(wasm::ValType::F32);
 553     break;
 554   case f64_func_f64:
 555     Rets.push_back(wasm::ValType::F64);
 556     Params.push_back(wasm::ValType::F64);
 557     break;
 558   case f64_func_i32:
 559     Rets.push_back(wasm::ValType::F64);
 560     Params.push_back(wasm::ValType::I32);
 561     break;
 562   case f64_func_i64:
 563     Rets.push_back(wasm::ValType::F64);
 564     Params.push_back(wasm::ValType::I64);
 565     break;
 566   case i32_func_f32:
 567     Rets.push_back(wasm::ValType::I32);
 568     Params.push_back(wasm::ValType::F32);
 569     break;
 570   case i32_func_f64:
 571     Rets.push_back(wasm::ValType::I32);
 572     Params.push_back(wasm::ValType::F64);
 573     break;
 574   case i32_func_i32:
 575     Rets.push_back(wasm::ValType::I32);
 576     Params.push_back(wasm::ValType::I32);
 577     break;
 578   case i64_func_f32:
 579     Rets.push_back(wasm::ValType::I64);
 580     Params.push_back(wasm::ValType::F32);
 581     break;
 582   case i64_func_f64:
 583     Rets.push_back(wasm::ValType::I64);
 584     Params.push_back(wasm::ValType::F64);
 585     break;
 586   case i64_func_i64:
 587     Rets.push_back(wasm::ValType::I64);
 588     Params.push_back(wasm::ValType::I64);
 589     break;
 590   case f32_func_f32_f32:
 591     Rets.push_back(wasm::ValType::F32);
 592     Params.push_back(wasm::ValType::F32);
 593     Params.push_back(wasm::ValType::F32);
 594     break;
 595   case f32_func_f32_i32:
 596     Rets.push_back(wasm::ValType::F32);
 597     Params.push_back(wasm::ValType::F32);
 598     Params.push_back(wasm::ValType::I32);
 599     break;
 600   case f32_func_i64_i64:
 601     Rets.push_back(wasm::ValType::F32);
 602     Params.push_back(wasm::ValType::I64);
 603     Params.push_back(wasm::ValType::I64);
 604     break;
 605   case f64_func_f64_f64:
 606     Rets.push_back(wasm::ValType::F64);
 607     Params.push_back(wasm::ValType::F64);
 608     Params.push_back(wasm::ValType::F64);
 609     break;
 610   case f64_func_f64_i32:
 611     Rets.push_back(wasm::ValType::F64);
 612     Params.push_back(wasm::ValType::F64);
 613     Params.push_back(wasm::ValType::I32);
 614     break;
 615   case f64_func_i64_i64:
 616     Rets.push_back(wasm::ValType::F64);
 617     Params.push_back(wasm::ValType::I64);
 618     Params.push_back(wasm::ValType::I64);
 619     break;
 620   case i16_func_f32:
 621     Rets.push_back(wasm::ValType::I32);
 622     Params.push_back(wasm::ValType::F32);
 623     break;
 624   case i16_func_f64:
 625     Rets.push_back(wasm::ValType::I32);
 626     Params.push_back(wasm::ValType::F64);
 627     break;
 628   case i16_func_i64_i64:
 629     Rets.push_back(wasm::ValType::I32);
 630     Params.push_back(wasm::ValType::I64);
 631     Params.push_back(wasm::ValType::I64);
 632     break;
 633   case i8_func_i8_i8:
 634     Rets.push_back(wasm::ValType::I32);
 635     Params.push_back(wasm::ValType::I32);
 636     Params.push_back(wasm::ValType::I32);
 637     break;
 638   case func_f32_iPTR_iPTR:
 639     Params.push_back(wasm::ValType::F32);
 640     Params.push_back(PtrTy);
 641     Params.push_back(PtrTy);
 642     break;
 643   case func_f64_iPTR_iPTR:
 644     Params.push_back(wasm::ValType::F64);
 645     Params.push_back(PtrTy);
 646     Params.push_back(PtrTy);
 647     break;
 648   case i16_func_i16_i16:
 649     Rets.push_back(wasm::ValType::I32);
 650     Params.push_back(wasm::ValType::I32);
 651     Params.push_back(wasm::ValType::I32);
 652     break;
 653   case i32_func_f32_f32:
 654     Rets.push_back(wasm::ValType::I32);
 655     Params.push_back(wasm::ValType::F32);
 656     Params.push_back(wasm::ValType::F32);
 657     break;
 658   case i32_func_f64_f64:
 659     Rets.push_back(wasm::ValType::I32);
 660     Params.push_back(wasm::ValType::F64);
 661     Params.push_back(wasm::ValType::F64);
 662     break;
 663   case i32_func_i32_i32:
 664     Rets.push_back(wasm::ValType::I32);
 665     Params.push_back(wasm::ValType::I32);
 666     Params.push_back(wasm::ValType::I32);
 667     break;
 668   case i32_func_i32_i32_iPTR:
 669     Rets.push_back(wasm::ValType::I32);
 670     Params.push_back(wasm::ValType::I32);
 671     Params.push_back(wasm::ValType::I32);
 672     Params.push_back(PtrTy);
 673     break;
 674   case i64_func_i64_i64:
 675     Rets.push_back(wasm::ValType::I64);
 676     Params.push_back(wasm::ValType::I64);
 677     Params.push_back(wasm::ValType::I64);
 678     break;
 679   case i64_func_i64_i64_iPTR:
 680     Rets.push_back(wasm::ValType::I64);
 681     Params.push_back(wasm::ValType::I64);
 682     Params.push_back(wasm::ValType::I64);
 683     Params.push_back(PtrTy);
 684     break;
 685   case i64_i64_func_f32:
 686 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 687     Rets.push_back(wasm::ValType::I64);
 688     Rets.push_back(wasm::ValType::I64);
 689 #else
 690     Params.push_back(PtrTy);
 691 #endif
 692     Params.push_back(wasm::ValType::F32);
 693     break;
 694   case i64_i64_func_f64:
 695 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 696     Rets.push_back(wasm::ValType::I64);
 697     Rets.push_back(wasm::ValType::I64);
 698 #else
 699     Params.push_back(PtrTy);
 700 #endif
 701     Params.push_back(wasm::ValType::F64);
 702     break;
 703   case i16_i16_func_i16_i16:
 704 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 705     Rets.push_back(wasm::ValType::I32);
 706     Rets.push_back(wasm::ValType::I32);
 707 #else
 708     Params.push_back(PtrTy);
 709 #endif
 710     Params.push_back(wasm::ValType::I32);
 711     Params.push_back(wasm::ValType::I32);
 712     break;
 713   case i32_i32_func_i32_i32:
 714 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 715     Rets.push_back(wasm::ValType::I32);
 716     Rets.push_back(wasm::ValType::I32);
 717 #else
 718     Params.push_back(PtrTy);
 719 #endif
 720     Params.push_back(wasm::ValType::I32);
 721     Params.push_back(wasm::ValType::I32);
 722     break;
 723   case i64_i64_func_i64_i64:
 724 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 725     Rets.push_back(wasm::ValType::I64);
 726     Rets.push_back(wasm::ValType::I64);
 727 #else
 728     Params.push_back(PtrTy);
 729 #endif
 730     Params.push_back(wasm::ValType::I64);
 731     Params.push_back(wasm::ValType::I64);
 732     break;
 733   case i64_i64_func_i64_i64_i64_i64:
 734 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 735     Rets.push_back(wasm::ValType::I64);
 736     Rets.push_back(wasm::ValType::I64);
 737 #else
 738     Params.push_back(PtrTy);
 739 #endif
 740     Params.push_back(wasm::ValType::I64);
 741     Params.push_back(wasm::ValType::I64);
 742     Params.push_back(wasm::ValType::I64);
 743     Params.push_back(wasm::ValType::I64);
 744     break;
 745   case i64_i64_func_i64_i64_i64_i64_iPTR:
 746 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 747     Rets.push_back(wasm::ValType::I64);
 748     Rets.push_back(wasm::ValType::I64);
 749 #else
 750     Params.push_back(PtrTy);
 751 #endif
 752     Params.push_back(wasm::ValType::I64);
 753     Params.push_back(wasm::ValType::I64);
 754     Params.push_back(wasm::ValType::I64);
 755     Params.push_back(wasm::ValType::I64);
 756     Params.push_back(PtrTy);
 757     break;
 758   case i64_i64_i64_i64_func_i64_i64_i64_i64:
 759 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 760     Rets.push_back(wasm::ValType::I64);
 761     Rets.push_back(wasm::ValType::I64);
 762     Rets.push_back(wasm::ValType::I64);
 763     Rets.push_back(wasm::ValType::I64);
 764 #else
 765     Params.push_back(PtrTy);
 766 #endif
 767     Params.push_back(wasm::ValType::I64);
 768     Params.push_back(wasm::ValType::I64);
 769     Params.push_back(wasm::ValType::I64);
 770     Params.push_back(wasm::ValType::I64);
 771     break;
 772   case i64_i64_func_i64_i64_i32:
 773 #if 0 // TODO: Enable this when wasm gets multiple-return-value support.
 774     Rets.push_back(wasm::ValType::I64);
 775     Rets.push_back(wasm::ValType::I64);
 776     Rets.push_back(wasm::ValType::I64);
 777     Rets.push_back(wasm::ValType::I64);
 778 #else
 779     Params.push_back(PtrTy);
 780 #endif
 781     Params.push_back(wasm::ValType::I64);
 782     Params.push_back(wasm::ValType::I64);
 783     Params.push_back(wasm::ValType::I32);
 784     break;
 785   case iPTR_func_iPTR_i32_iPTR:
 786     Rets.push_back(PtrTy);
 787     Params.push_back(PtrTy);
 788     Params.push_back(wasm::ValType::I32);
 789     Params.push_back(PtrTy);
 790     break;
 791   case iPTR_func_iPTR_iPTR_iPTR:
 792     Rets.push_back(PtrTy);
 793     Params.push_back(PtrTy);
 794     Params.push_back(PtrTy);
 795     Params.push_back(PtrTy);
 796     break;
 797   case f32_func_f32_f32_f32:
 798     Rets.push_back(wasm::ValType::F32);
 799     Params.push_back(wasm::ValType::F32);
 800     Params.push_back(wasm::ValType::F32);
 801     Params.push_back(wasm::ValType::F32);
 802     break;
 803   case f64_func_f64_f64_f64:
 804     Rets.push_back(wasm::ValType::F64);
 805     Params.push_back(wasm::ValType::F64);
 806     Params.push_back(wasm::ValType::F64);
 807     Params.push_back(wasm::ValType::F64);
 808     break;
 809   case func_i64_i64_iPTR_iPTR:
 810     Params.push_back(wasm::ValType::I64);
 811     Params.push_back(wasm::ValType::I64);
 812     Params.push_back(PtrTy);
 813     Params.push_back(PtrTy);
 814     break;
 815   case func_iPTR_f32:
 816     Params.push_back(PtrTy);
 817     Params.push_back(wasm::ValType::F32);
 818     break;
 819   case func_iPTR_f64:
 820     Params.push_back(PtrTy);
 821     Params.push_back(wasm::ValType::F64);
 822     break;
 823   case func_iPTR_i32:
 824     Params.push_back(PtrTy);
 825     Params.push_back(wasm::ValType::I32);
 826     break;
 827   case func_iPTR_i64:
 828     Params.push_back(PtrTy);
 829     Params.push_back(wasm::ValType::I64);
 830     break;
 831   case func_iPTR_i64_i64:
 832     Params.push_back(PtrTy);
 833     Params.push_back(wasm::ValType::I64);
 834     Params.push_back(wasm::ValType::I64);
 835     break;
 836   case func_iPTR_i64_i64_i32:
 837     Params.push_back(PtrTy);
 838     Params.push_back(wasm::ValType::I64);
 839     Params.push_back(wasm::ValType::I64);
 840     Params.push_back(wasm::ValType::I32);
 841     break;
 842   case func_iPTR_i64_i64_i64_i64:
 843     Params.push_back(PtrTy);
 844     Params.push_back(wasm::ValType::I64);
 845     Params.push_back(wasm::ValType::I64);
 846     Params.push_back(wasm::ValType::I64);
 847     Params.push_back(wasm::ValType::I64);
 848     break;
 849   case func_iPTR_i64_i64_i64_i64_i64_i64:
 850     Params.push_back(PtrTy);
 851     Params.push_back(wasm::ValType::I64);
 852     Params.push_back(wasm::ValType::I64);
 853     Params.push_back(wasm::ValType::I64);
 854     Params.push_back(wasm::ValType::I64);
 855     Params.push_back(wasm::ValType::I64);
 856     Params.push_back(wasm::ValType::I64);
 857     break;
 858   case i32_func_i64_i64:
 859     Rets.push_back(wasm::ValType::I32);
 860     Params.push_back(wasm::ValType::I64);
 861     Params.push_back(wasm::ValType::I64);
 862     break;
 863   case i32_func_i64_i64_i64_i64:
 864     Rets.push_back(wasm::ValType::I32);
 865     Params.push_back(wasm::ValType::I64);
 866     Params.push_back(wasm::ValType::I64);
 867     Params.push_back(wasm::ValType::I64);
 868     Params.push_back(wasm::ValType::I64);
 869     break;
 870   case iPTR_func_f32:
 871     Rets.push_back(PtrTy);
 872     Params.push_back(wasm::ValType::F32);
 873     break;
 874   case iPTR_func_f64:
 875     Rets.push_back(PtrTy);
 876     Params.push_back(wasm::ValType::F64);
 877     break;
 878   case iPTR_func_i64_i64:
 879     Rets.push_back(PtrTy);
 880     Params.push_back(wasm::ValType::I64);
 881     Params.push_back(wasm::ValType::I64);
 882     break;
 883   case unsupported:
 884     llvm_unreachable("unsupported runtime library signature");
 885   }
 886 }
 887
 888 static ManagedStatic<StaticLibcallNameMap> LibcallNameMap;
 889 // TODO: If the RTLIB::Libcall-taking flavor of GetSignature remains unsed
 890 // other than here, just roll its logic into this version.
 891 void llvm::getLibcallSignature(const WebAssemblySubtarget &Subtarget,
 892                                StringRef Name,
 893                                SmallVectorImpl<wasm::ValType> &Rets,
 894                                SmallVectorImpl<wasm::ValType> &Params) {
 895   auto &Map = LibcallNameMap->Map;
 896   auto Val = Map.find(Name);
 897 #ifndef NDEBUG
 898   if (Val == Map.end()) {
 899     auto message = std::string("unexpected runtime library name: ") +
 900                    std::string(Name);
 901     llvm_unreachable(message.c_str());
 902   }
 903 #endif
 904   return getLibcallSignature(Subtarget, Val->second, Rets, Params);
 905 }