https://llvm.org/bugs/show_bug.cgi?id=26370
Bug ID: 26370
Summary: Clang should support 'no_caller_saved_registers'
attribute
Product: clang
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: hjl.to...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The current interrupt spec has
To be feature complete, compiler should implement the optional
'no_caller_saved_registers' attribute:
Use this attribute to indicate that the specified function has no
caller-saved registers. That is, all registers are callee-saved.
The compiler generates proper function entry and exit sequences to
save and restore any modified registers.
The user can call functions specified with 'no_caller_saved_registers'
attribute from an interrupt handler without saving and restoring all
call clobbered registers.
llvm/clang should implement it.
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