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| author | Reid Kleckner <rnk@google.com> | 2019-10-07 22:28:58 +0000 |
|---|---|---|
| committer | Reid Kleckner <rnk@google.com> | 2019-10-07 22:28:58 +0000 |
| commit | f9b67b810e2d413606b0d5891ed9477d819bcab9 (patch) | |
| tree | f5bc8a674f930c49b92f653ea7e46be53f13c084 /llvm/lib/AsmParser/LLParser.cpp | |
| parent | daeead4b02f062bf5a21e154ab7726b3e1dd41bd (diff) | |
| download | bcm5719-llvm-f9b67b810e2d413606b0d5891ed9477d819bcab9.tar.gz bcm5719-llvm-f9b67b810e2d413606b0d5891ed9477d819bcab9.zip | |
[X86] Add new calling convention that guarantees tail call optimization
When the target option GuaranteedTailCallOpt is specified, calls with
the fastcc calling convention will be transformed into tail calls if
they are in tail position. This diff adds a new calling convention,
tailcc, currently supported only on X86, which behaves the same way as
fastcc, except that the GuaranteedTailCallOpt flag does not need to
enabled in order to enable tail call optimization.
Patch by Dwight Guth <dwight.guth@runtimeverification.com>!
Reviewed By: lebedev.ri, paquette, rnk
Differential Revision: https://reviews.llvm.org/D67855
llvm-svn: 373976
Diffstat (limited to 'llvm/lib/AsmParser/LLParser.cpp')
| -rw-r--r-- | llvm/lib/AsmParser/LLParser.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp index 5ea0b7d39c1..9bb3ca145c2 100644 --- a/llvm/lib/AsmParser/LLParser.cpp +++ b/llvm/lib/AsmParser/LLParser.cpp @@ -1955,6 +1955,7 @@ void LLParser::ParseOptionalDLLStorageClass(unsigned &Res) { /// ::= 'amdgpu_ps' /// ::= 'amdgpu_cs' /// ::= 'amdgpu_kernel' +/// ::= 'tailcc' /// ::= 'cc' UINT /// bool LLParser::ParseOptionalCallingConv(unsigned &CC) { @@ -2000,6 +2001,7 @@ bool LLParser::ParseOptionalCallingConv(unsigned &CC) { case lltok::kw_amdgpu_ps: CC = CallingConv::AMDGPU_PS; break; case lltok::kw_amdgpu_cs: CC = CallingConv::AMDGPU_CS; break; case lltok::kw_amdgpu_kernel: CC = CallingConv::AMDGPU_KERNEL; break; + case lltok::kw_tailcc: CC = CallingConv::Tail; break; case lltok::kw_cc: { Lex.Lex(); return ParseUInt32(CC); |
