https://bugs.llvm.org/show_bug.cgi?id=51521
Bug ID: 51521
Summary: error: invalid type '_ExtInt(8)' in asm output
Product: clang
Version: 12.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: pedro.lama...@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
Expected:
Clang assembler knows how to bind _ExtInt variables and extended assembler
parameters.
Current:
Clang rejects _ExtInt in extended assembler parameters.
This function:
void out1 ( _ExtInt(16) port, _ExtInt(8) data )
{
__asm__ ( "outb %0, %1" : : "a"(data), "Nd"(port) : );
}
raises this error:
<source>:3:37: error: invalid type '_ExtInt(8)' in asm output
__asm__ ( "outb %0, %1" : : "a"(data), "Nd"(port) : );
Test case in Godbolt with Clang trunk: https://godbolt.org/z/xdx5TMPd8
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