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0b063def98
1. Address offset is in bytes. 2. Make sure truncate node uses are replaced with new load. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35274 91177308-0d34-0410-b5e6-96231b3b80d8
Common register allocation / spilling problem:
mul lr, r4, lr
str lr, [sp, #+52]
ldr lr, [r1, #+32]
sxth r3, r3
ldr r4, [sp, #+52]
mla r4, r3, lr, r4
can be:
mul lr, r4, lr
mov r4, lr
str lr, [sp, #+52]
ldr lr, [r1, #+32]
sxth r3, r3
mla r4, r3, lr, r4
and then "merge" mul and mov:
mul r4, r4, lr
str lr, [sp, #+52]
ldr lr, [r1, #+32]
sxth r3, r3
mla r4, r3, lr, r4
It also increase the likelyhood the store may become dead.