http://llvm.org/bugs/show_bug.cgi?id=21430
Bug ID: 21430
Summary: Redundant spills with MI Scheduler
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
Created attachment 13264
--> http://llvm.org/bugs/attachment.cgi?id=13264&action=edit
test.ll
On attached test case I see that there are several spills that can be
eliminated with better scheduling.
Use llc to compile it:
llc -mcpu=hsw vs2.ll
When compiling with llc before MI Scheduler was enabled (before r192750) I see
no spills. Using r192750 and also with latest trunk I see spills.
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