[PATCH] D104061: [LangRef] clarify the meaning of noimplicitfloat
Bob Haarman via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Jun 11 17:01:36 PDT 2021
inglorion updated this revision to Diff 351593.
inglorion added a comment.
Also specified that this inhibits the use of SIMD/vector registers
(which is true at least of x86_64 and armv8).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D104061/new/
https://reviews.llvm.org/D104061
Files:
llvm/docs/LangRef.rst
Index: llvm/docs/LangRef.rst
===================================================================
--- llvm/docs/LangRef.rst
+++ llvm/docs/LangRef.rst
@@ -1634,7 +1634,11 @@
memory on it's behalf. As a result, perhaps surprisingly, a ``nofree``
function can return a pointer to a previously deallocated memory object.
``noimplicitfloat``
- This attributes disables implicit floating-point instructions.
+ Disallows implicit floating-point code. This inhibits optimizations that
+ use floating-point code and floating-point/SIMD/vector registers for
+ operations that are not nominally floating-point. LLVM instructions that
+ perform floating-point operations or require access to floating-point
+ registers may still cause floating-point code to be generated.
``noinline``
This attribute indicates that the inliner should never inline this
function in any situation. This attribute may not be used together
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