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Add two new calling conventions for runtime calls

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This patch adds two new target-independent calling conventions for runtime
calls - PreserveMost and PreserveAll.
The target-specific implementation for X86-64 is defined as following:
  - Arguments are passed as for the default C calling convention
  - The same applies for the return value(s)
  - PreserveMost preserves all GPRs - except R11
  - PreserveAll preserves all GPRs and all XMMs/YMMs - except R11

Reviewed by Lang and Philip

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka
2014-01-17 19:47:03 +00:00
parent 41e1c04201
commit ceaf829339
11 changed files with 274 additions and 0 deletions
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4
lib/AsmParser/LLParser.cpp
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@ -1369,6 +1369,8 @@ bool LLParser::ParseOptionalDLLStorageClass(unsigned &Res) {
/// ::= 'x86_64_win64cc'
/// ::= 'webkit_jscc'
/// ::= 'anyregcc'
/// ::= 'preserve_mostcc'
/// ::= 'preserve_allcc'
/// ::= 'cc' UINT
///
bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) {
@ -1393,6 +1395,8 @@ bool LLParser::ParseOptionalCallingConv(CallingConv::ID &CC) {
case lltok::kw_x86_64_win64cc: CC = CallingConv::X86_64_Win64; break;
case lltok::kw_webkit_jscc: CC = CallingConv::WebKit_JS; break;
case lltok::kw_anyregcc: CC = CallingConv::AnyReg; break;
case lltok::kw_preserve_mostcc:CC = CallingConv::PreserveMost; break;
case lltok::kw_preserve_allcc: CC = CallingConv::PreserveAll; break;
case lltok::kw_cc: {
unsigned ArbitraryCC;
Lex.Lex();