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# blit & load elimination
export
function $f() {
@start
%x =l alloc4 12
%y =l alloc4 12
%x1 =l add 1, %x
%x2 =l add 1, %x1
%x3 =l add 1, %x2
%x4 =l add 1, %x3
%x5 =l add 1, %x4
%x6 =l add 1, %x5
%x7 =l add 1, %x6
%x8 =l add 1, %x7
%x9 =l add 1, %x8
%xa =l add 1, %x9
%xb =l add 1, %xa
%y1 =l add 1, %y
%y4 =l add 4, %y
storew 287454020, %x4 # 0x11223344
storew 1432778632, %y # 0x55667788
blit %y, %x5, 1
%n =w load %x4
call $px(w %n) # 0x11228844
storew 287454020, %x4 # 0x11223344
storew 1432778632, %y # 0x55667788
blit %y, %x5, 2
%n =w load %x4
call $px(w %n) # 0x11778844
storew 287454020, %x4 # 0x11223344
storew 1432778632, %y # 0x55667788
blit %y, %x5, 4
%n =w load %x4
call $px(w %n) # 0x66778844
storew 287454020, %x4 # 0x11223344
storew 1432778632, %y # 0x55667788
blit %y, %x2, 4
%n =w load %x4
call $px(w %n) # 0x11225566
storew 287454020, %x4 # 0x11223344
storew 0, %y
storew 1432778632, %y4 # 0x55667788
blit %y1, %x2, 7
%n =w load %x4
call $px(w %n) # 0x66778800
ret
}
# >>> driver
# #include <stdio.h>
# void px(unsigned n) {
# printf("0x%08x\n", n);
# }
# int main() {
# extern void f(void);
# f();
# }
# <<<
# >>> output
# 0x11228844
# 0x11778844
# 0x66778844
# 0x11225566
# 0x66778800
# <<<
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