http://llvm.org/bugs/show_bug.cgi?id=9800
Summary: missed ARM optimization: use LDMIA
Product: new-bugs
Version: 2.9
Platform: Other
URL: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48789
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6507)
--> (http://llvm.org/bugs/attachment.cgi?id=6507)
reverse.c
See GCC bug in $URL, LLVM has same issue:
clang -cc1 -O3 reverse.c -triple arm-elf -target-cpu arm946e-s -S -o -
Generates too many ldr/str instructions, it should use LDMIA as shown in
hand-optimized version:
http://gcc.gnu.org/bugzilla/attachment.cgi?id=24115
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