llvm-project

Commit Graph

Author	SHA1	Message	Date
Chad Rosier	c8cfd3a8fb	Add support for emitting both signed- and zero-extend loads. Fix SimplifyAddress to handle either a 12-bit unsigned offset or the ARM +/-imm8 offsets (addressing mode 3). This enables a load followed by an integer extend to be folded into a single load. For example: ldrb r1, [r0] ldrb r1, [r0] uxtb r2, r1 => mov r3, r2 mov r3, r1 llvm-svn: 144488	2011-11-13 02:23:59 +00:00

Author

SHA1

Message

Date

Chad Rosier

c8cfd3a8fb

Add support for emitting both signed- and zero-extend loads. Fix

SimplifyAddress to handle either a 12-bit unsigned offset or the ARM +/-imm8
offsets (addressing mode 3).  This enables a load followed by an integer 
extend to be folded into a single load.

For example:
ldrb r1, [r0]       ldrb r1, [r0]
uxtb r2, r1     =>
mov  r3, r2         mov  r3, r1

llvm-svn: 144488

2011-11-13 02:23:59 +00:00

1 Commits