http://llvm.org/bugs/show_bug.cgi?id=13804
Bug #: 13804
Summary: llvm-mc does not simplify stm/ldm when only one source
register
Product: libraries
Version: trunk
Platform: PC
OS/Version: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: ARM
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
The ARM backend is not simplifying 'stm' and 'ldm' instructions when there is
only one source register.
Currently:
stmia.w r0, {r1}
Could rewrite as:
str.w r1, [r0]
And likewise, currently:
stmia.w r0!, {r1}
Could rewrite as:
str r1, [r0], #4
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