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X86: Implement the vectorcall calling convention

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This is a Microsoft calling convention that supports both x86 and x86_64
subtargets. It passes vector and floating point arguments in XMM0-XMM5,
and passes them indirectly once they are consumed.

Homogenous vector aggregates of up to four elements can be passed in
sequential vector registers, but this part is not implemented in LLVM
and will be handled in Clang.

On 32-bit x86, it is similar to fastcall in that it uses ecx:edx as
integer register parameters and is callee cleanup. On x86_64, it
delegates to the normal win64 calling convention.

Reviewers: majnemer

Differential Revision: http://reviews.llvm.org/D5943

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220745 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2014-10-28 01:29:26 +00:00
parent dd778c6c9f
commit d5de327da0
9 changed files with 226 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
lib/AsmParser/LLLexer.cpp
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@@ -580,6 +580,7 @@ lltok::Kind LLLexer::LexIdentifier() {
KEYWORD(x86_stdcallcc);
KEYWORD(x86_fastcallcc);
KEYWORD(x86_thiscallcc);
KEYWORD(x86_vectorcallcc);
KEYWORD(arm_apcscc);
KEYWORD(arm_aapcscc);
KEYWORD(arm_aapcs_vfpcc);

2
lib/AsmParser/LLParser.cpp
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@@ -1448,6 +1448,7 @@ bool LLParser::ParseOptionalDLLStorageClass(unsigned &Res) {
/// ::= 'x86_stdcallcc'
/// ::= 'x86_fastcallcc'
/// ::= 'x86_thiscallcc'
/// ::= 'x86_vectorcallcc'
/// ::= 'arm_apcscc'
/// ::= 'arm_aapcscc'
/// ::= 'arm_aapcs_vfpcc'
@@ -1473,6 +1474,7 @@ bool LLParser::ParseOptionalCallingConv(unsigned &CC) {
case lltok::kw_x86_stdcallcc: CC = CallingConv::X86_StdCall; break;
case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break;
case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break;
case lltok::kw_x86_vectorcallcc:CC = CallingConv::X86_VectorCall; break;
case lltok::kw_arm_apcscc: CC = CallingConv::ARM_APCS; break;
case lltok::kw_arm_aapcscc: CC = CallingConv::ARM_AAPCS; break;
case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break;

2
lib/AsmParser/LLToken.h
View File

@@ -87,7 +87,7 @@ namespace lltok {
kw_cc, kw_ccc, kw_fastcc, kw_coldcc,
kw_intel_ocl_bicc,
kw_x86_stdcallcc, kw_x86_fastcallcc, kw_x86_thiscallcc,
kw_x86_stdcallcc, kw_x86_fastcallcc, kw_x86_thiscallcc, kw_x86_vectorcallcc,
kw_arm_apcscc, kw_arm_aapcscc, kw_arm_aapcs_vfpcc,
kw_msp430_intrcc,
kw_ptx_kernel, kw_ptx_device,