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* [Bug middle-end/107027] New: Please improve the documentation of global register variables
@ 2022-09-24 18:28 segher at gcc dot gnu.org
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From: segher at gcc dot gnu.org @ 2022-09-24 18:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107027
Bug ID: 107027
Summary: Please improve the documentation of global register
variables
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: segher at gcc dot gnu.org
Target Milestone: ---
The semantics of global register variables are a strict superset of the
semantics
of local register variables, but this isn't clearly documented. Having a
global
register variable as operand to an extended inline asm guarantees the register
declared for the register variable is used in the asm, it never is copied to a
temporary or similar.
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2022-09-24 18:28 [Bug middle-end/107027] New: Please improve the documentation of global register variables segher at gcc dot gnu.org
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