http://llvm.org/bugs/show_bug.cgi?id=9169
Summary: inlined memcpy from/to global address inefficient
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: SystemZ
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6128)
--> (http://llvm.org/bugs/attachment.cgi?id=6128)
test case
The code produced from the test case could be a lot better with
base+displacement:
ff:
larl %r1, aa+24
lg %r1, 0(%r1)
larl %r2, bb+24
stg %r1, 0(%r2)
larl %r1, aa+16
lg %r1, 0(%r1)
larl %r2, bb+16
stg %r1, 0(%r2)
larl %r1, aa+8
lg %r1, 0(%r1)
larl %r2, bb+8
stg %r1, 0(%r2)
larl %r1, aa
lg %r1, 0(%r1)
larl %r2, bb
stg %r1, 0(%r2)
br %r14
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