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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:32 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:32 +0000 |
commit | 4547b622d8d29df964fa2914213088b148c498fc (patch) | |
tree | 9fc6b25f3c3add6b745be9a2400a6e96140046e9 /compiler/rustc_target/src/spec/abi.rs | |
parent | Releasing progress-linux version 1.66.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-4547b622d8d29df964fa2914213088b148c498fc.tar.xz rustc-4547b622d8d29df964fa2914213088b148c498fc.zip |
Merging upstream version 1.67.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'compiler/rustc_target/src/spec/abi.rs')
-rw-r--r-- | compiler/rustc_target/src/spec/abi.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/spec/abi.rs b/compiler/rustc_target/src/spec/abi.rs index ce45fa139..cb2a0c04c 100644 --- a/compiler/rustc_target/src/spec/abi.rs +++ b/compiler/rustc_target/src/spec/abi.rs @@ -40,6 +40,28 @@ pub enum Abi { RustCold, } +impl Abi { + pub fn supports_varargs(self) -> bool { + // * C and Cdecl obviously support varargs. + // * C can be based on SysV64 or Win64, so they must support varargs. + // * EfiApi is based on Win64 or C, so it also supports it. + // + // * Stdcall does not, because it would be impossible for the callee to clean + // up the arguments. (callee doesn't know how many arguments are there) + // * Same for Fastcall, Vectorcall and Thiscall. + // * System can become Stdcall, so is also a no-no. + // * Other calling conventions are related to hardware or the compiler itself. + match self { + Self::C { .. } + | Self::Cdecl { .. } + | Self::Win64 { .. } + | Self::SysV64 { .. } + | Self::EfiApi => true, + _ => false, + } + } +} + #[derive(Copy, Clone)] pub struct AbiData { abi: Abi, |