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Improve dead code elimination

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This commit is contained in:
Justine Tunney 2021-02-08 04:04:42 -08:00
parent 760db8c5ad
commit 0e36cb3ac4
6606 changed files with 9685 additions and 9854 deletions
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37
libc/runtime/cosmo.S
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@ -23,7 +23,6 @@
#include "libc/sysv/consts/map.h"
#include "libc/dce.h"
.text.startup
.source __FILE__
/ Cosmopolitan runtime.
/
@ -34,30 +33,48 @@
/ @noreturn
cosmo: push %rbp
mov %rsp,%rbp
ezlea _base,bx
mov %edi,%r12d
mov %rsi,%r13
mov %rdx,%r14
mov %rcx,%r15
#ifdef __FAST_MATH__
call __fast_math
push %rax
stmxcsr (%rsp)
orl $0x8040,(%rsp)
ldmxcsr (%rsp)
pop %rax
#endif
call _init
call _construct
ezlea __init_array_start,ax # static ctors in forward order
.weak __init_array_start # could be called multiple times
ezlea __init_array_end,cx # idempotency recommended
.weak __init_array_end # @see ape/ape.lds
1: cmp %rax,%rcx
je 2f
push %rax
push %rcx
call .Largs
call *(%rax)
pop %rcx
pop %rax
add $8,%rax
jmp 1b
2: nop
#if !IsTrustworthy()
mov $PROT_READ,%edi
call _piro
#endif
mov %r12d,%edi
mov %r13,%rsi
mov %r14,%rdx
mov %r15,%rcx
call .Largs
.weak main
call main
xchg %eax,%edi
call exit
.endfn cosmo,weak,hidden
ud2
.Largs: mov %r12d,%edi
mov %r13,%rsi
mov %r14,%rdx
mov %r15,%rcx
ret
.endfn cosmo,weak
#ifdef __PG__
.init.start 800,_init_ftrace