http://llvm.org/bugs/show_bug.cgi?id=19314
Bug ID: 19314
Summary: [ARM64] Use of __sincos_stret on non-Darwin platforms.
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: llc
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
Classification: Unclassified
>From ARM64ISelLowering.cpp:
-----------------------------------------------------------------------
// For iOS, we don't want to the normal expansion of a libcall to
// sincos. We want to issue a libcall to __sincos_stret to avoid memory
// traffic.
setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
-----------------------------------------------------------------------
This code needs to be conditionalized to accommodate non-Darwin platforms.
This is causing link-time failures for a few SPEC benchmarks when using the
–fno-math-errno flag, which is required for peak performance.
I believe it suffices to just expand these on non-Darwin platforms:
- setOperationAction(ISD::FSINCOS, MVT::f64, Custom);
- setOperationAction(ISD::FSINCOS, MVT::f32, Custom);
+ setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
+ setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
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