http://llvm.org/bugs/show_bug.cgi?id=2634
Summary: Remat applied to updated value
Product: libraries
Version: 2.3
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Register Allocator
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [email protected]
In SPEC CPU 2006 leslie3d, a value is spilled, split and one of the splits is
spilled again. The value happens to be rematable and when the split interval
is spilled two-address rewriting causes the enregistered value to be changed.
But live interval analysis has outdated information and thinks it can insert a
remat of the old value just after the new value is written to the register.
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