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mrowe/better-annotated.s

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clang compiled to ARM assembler
Raw
better-annotated.s
.section __TEXT,__text,regular,pure_instructions
.build_version macos, 11, 0 sdk_version 11, 3
.globl _main ; -- Begin function main
.p2align 2
_main: ; @main
Lfunc_begin0:
.file 1 "/Users/mrowe/src" "better.c"
.loc 1 4 0 ; better.c:4:0
.cfi_startproc
; %bb.0:
sub sp, sp, #48 ; =48
stp x29, x30, [sp, #32] ; 16-byte Folded Spill
add x29, sp, #32 ; =32
.cfi_def_cfa w29, 16
.cfi_offset w30, -8
.cfi_offset w29, -16
stur wzr, [x29, #-4]
stur w0, [x29, #-8]
str x1, [sp, #16]
Ltmp0:
.loc 1 0 0 prologue_end ; better.c:0:0
adrp x0, l_.str@PAGE
add x0, x0, l_.str@PAGEOFF
.loc 1 6 3 ; better.c:6:3
bl _printf
mov w8, #1
.loc 1 8 7 ; better.c:8:7
str w8, [sp, #12]
.loc 1 9 21 ; better.c:9:21
ldr w9, [sp, #12]
.loc 1 9 26 is_stmt 0 ; better.c:9:26
ldr w10, [sp, #12]
add w11, w10, #1 ; =1
str w11, [sp, #12]
.loc 1 9 23 ; better.c:9:23
subs w9, w9, w10
cset w10, gt
.loc 1 9 8 ; better.c:9:8
and w8, w10, w8
strb w8, [sp, #11]
Ltmp1:
.loc 1 11 6 is_stmt 1 ; better.c:11:6
ldrb w8, [sp, #11]
Ltmp2:
.loc 1 11 6 is_stmt 0 ; better.c:11:6
tbnz w8, #0, LBB0_1
b LBB0_2
LBB0_1:
Ltmp3:
.loc 1 0 0 ; better.c:0:0
adrp x0, l_.str.1@PAGE
add x0, x0, l_.str.1@PAGEOFF
.loc 1 12 5 is_stmt 1 ; better.c:12:5
bl _printf
.loc 1 13 3 ; better.c:13:3
b LBB0_3
Ltmp4:
LBB0_2:
.loc 1 0 0 is_stmt 0 ; better.c:0:0
adrp x0, l_.str.2@PAGE
add x0, x0, l_.str.2@PAGEOFF
.loc 1 14 5 is_stmt 1 ; better.c:14:5
bl _printf
Ltmp5:
LBB0_3:
.loc 1 0 0 is_stmt 0 ; better.c:0:0
adrp x0, l_.str.3@PAGE
add x0, x0, l_.str.3@PAGEOFF
.loc 1 17 3 is_stmt 1 ; better.c:17:3
bl _printf
mov w8, #0
.loc 1 19 3 ; better.c:19:3
mov x0, x8
ldp x29, x30, [sp, #32] ; 16-byte Folded Reload
add sp, sp, #48 ; =48
ret
Ltmp6:
Lfunc_end0:
.cfi_endproc
; -- End function
.section __TEXT,__cstring,cstring_literals
l_.str: ; @.str
.asciz "Which is greater, C or C++?\nAnswer: "
l_.str.1: ; @.str.1
.asciz "C"
l_.str.2: ; @.str.2
.asciz "C++"
l_.str.3: ; @.str.3
.asciz "\n"
.section __DWARF,__debug_abbrev,regular,debug
Lsection_abbrev:
.byte 1 ; Abbreviation Code
.byte 17 ; DW_TAG_compile_unit
.byte 1 ; DW_CHILDREN_yes
.byte 37 ; DW_AT_producer
.byte 14 ; DW_FORM_strp
.byte 19 ; DW_AT_language
.byte 5 ; DW_FORM_data2
.byte 3 ; DW_AT_name
.byte 14 ; DW_FORM_strp
.ascii "\202|" ; DW_AT_LLVM_sysroot
.byte 14 ; DW_FORM_strp
.ascii "\357\177" ; DW_AT_APPLE_sdk
.byte 14 ; DW_FORM_strp
.byte 16 ; DW_AT_stmt_list
.byte 23 ; DW_FORM_sec_offset
.byte 27 ; DW_AT_comp_dir
.byte 14 ; DW_FORM_strp
.byte 17 ; DW_AT_low_pc
.byte 1 ; DW_FORM_addr
.byte 18 ; DW_AT_high_pc
.byte 6 ; DW_FORM_data4
.byte 0 ; EOM(1)
.byte 0 ; EOM(2)
.byte 2 ; Abbreviation Code
.byte 46 ; DW_TAG_subprogram
.byte 1 ; DW_CHILDREN_yes
.byte 17 ; DW_AT_low_pc
.byte 1 ; DW_FORM_addr
.byte 18 ; DW_AT_high_pc
.byte 6 ; DW_FORM_data4
.byte 64 ; DW_AT_frame_base
.byte 24 ; DW_FORM_exprloc
.byte 3 ; DW_AT_name
.byte 14 ; DW_FORM_strp
.byte 58 ; DW_AT_decl_file
.byte 11 ; DW_FORM_data1
.byte 59 ; DW_AT_decl_line
.byte 11 ; DW_FORM_data1
.byte 39 ; DW_AT_prototyped
.byte 25 ; DW_FORM_flag_present
.byte 73 ; DW_AT_type
.byte 19 ; DW_FORM_ref4
.byte 63 ; DW_AT_external
.byte 25 ; DW_FORM_flag_present
.byte 0 ; EOM(1)
.byte 0 ; EOM(2)
.byte 3 ; Abbreviation Code
.byte 5 ; DW_TAG_formal_parameter
.byte 0 ; DW_CHILDREN_no
.byte 2 ; DW_AT_location
.byte 24 ; DW_FORM_exprloc
.byte 3 ; DW_AT_name
.byte 14 ; DW_FORM_strp
.byte 58 ; DW_AT_decl_file
.byte 11 ; DW_FORM_data1
.byte 59 ; DW_AT_decl_line
.byte 11 ; DW_FORM_data1
.byte 73 ; DW_AT_type
.byte 19 ; DW_FORM_ref4
.byte 0 ; EOM(1)
.byte 0 ; EOM(2)
.byte 4 ; Abbreviation Code
.byte 52 ; DW_TAG_variable
.byte 0 ; DW_CHILDREN_no
.byte 2 ; DW_AT_location
.byte 24 ; DW_FORM_exprloc
.byte 3 ; DW_AT_name
.byte 14 ; DW_FORM_strp
.byte 58 ; DW_AT_decl_file
.byte 11 ; DW_FORM_data1
.byte 59 ; DW_AT_decl_line
.byte 11 ; DW_FORM_data1
.byte 73 ; DW_AT_type
.byte 19 ; DW_FORM_ref4
.byte 0 ; EOM(1)
.byte 0 ; EOM(2)
.byte 5 ; Abbreviation Code
.byte 36 ; DW_TAG_base_type
.byte 0 ; DW_CHILDREN_no
.byte 3 ; DW_AT_name
.byte 14 ; DW_FORM_strp
.byte 62 ; DW_AT_encoding
.byte 11 ; DW_FORM_data1
.byte 11 ; DW_AT_byte_size
.byte 11 ; DW_FORM_data1
.byte 0 ; EOM(1)
.byte 0 ; EOM(2)
.byte 6 ; Abbreviation Code
.byte 15 ; DW_TAG_pointer_type
.byte 0 ; DW_CHILDREN_no
.byte 73 ; DW_AT_type
.byte 19 ; DW_FORM_ref4
.byte 0 ; EOM(1)
.byte 0 ; EOM(2)
.byte 0 ; EOM(3)
.section __DWARF,__debug_info,regular,debug
Lsection_info:
Lcu_begin0:
.set Lset0, Ldebug_info_end0-Ldebug_info_start0 ; Length of Unit
.long Lset0
Ldebug_info_start0:
.short 4 ; DWARF version number
.set Lset1, Lsection_abbrev-Lsection_abbrev ; Offset Into Abbrev. Section
.long Lset1
.byte 8 ; Address Size (in bytes)
.byte 1 ; Abbrev [1] 0xb:0x99 DW_TAG_compile_unit
.long 0 ; DW_AT_producer
.short 12 ; DW_AT_language
.long 47 ; DW_AT_name
.long 56 ; DW_AT_LLVM_sysroot
.long 108 ; DW_AT_APPLE_sdk
.set Lset2, Lline_table_start0-Lsection_line ; DW_AT_stmt_list
.long Lset2
.long 119 ; DW_AT_comp_dir
.quad Lfunc_begin0 ; DW_AT_low_pc
.set Lset3, Lfunc_end0-Lfunc_begin0 ; DW_AT_high_pc
.long Lset3
.byte 2 ; Abbrev [2] 0x32:0x52 DW_TAG_subprogram
.quad Lfunc_begin0 ; DW_AT_low_pc
.set Lset4, Lfunc_end0-Lfunc_begin0 ; DW_AT_high_pc
.long Lset4
.byte 1 ; DW_AT_frame_base
.byte 109
.long 136 ; DW_AT_name
.byte 1 ; DW_AT_decl_file
.byte 4 ; DW_AT_decl_line
; DW_AT_prototyped
.long 132 ; DW_AT_type
; DW_AT_external
.byte 3 ; Abbrev [3] 0x4b:0xe DW_TAG_formal_parameter
.byte 2 ; DW_AT_location
.byte 145
.byte 120
.long 145 ; DW_AT_name
.byte 1 ; DW_AT_decl_file
.byte 4 ; DW_AT_decl_line
.long 132 ; DW_AT_type
.byte 3 ; Abbrev [3] 0x59:0xe DW_TAG_formal_parameter
.byte 2 ; DW_AT_location
.byte 143
.byte 16
.long 150 ; DW_AT_name
.byte 1 ; DW_AT_decl_file
.byte 4 ; DW_AT_decl_line
.long 139 ; DW_AT_type
.byte 4 ; Abbrev [4] 0x67:0xe DW_TAG_variable
.byte 2 ; DW_AT_location
.byte 143
.byte 12
.long 160 ; DW_AT_name
.byte 1 ; DW_AT_decl_file
.byte 8 ; DW_AT_decl_line
.long 132 ; DW_AT_type
.byte 4 ; Abbrev [4] 0x75:0xe DW_TAG_variable
.byte 2 ; DW_AT_location
.byte 143
.byte 11
.long 162 ; DW_AT_name
.byte 1 ; DW_AT_decl_file
.byte 9 ; DW_AT_decl_line
.long 156 ; DW_AT_type
.byte 0 ; End Of Children Mark
.byte 5 ; Abbrev [5] 0x84:0x7 DW_TAG_base_type
.long 141 ; DW_AT_name
.byte 5 ; DW_AT_encoding
.byte 4 ; DW_AT_byte_size
.byte 6 ; Abbrev [6] 0x8b:0x5 DW_TAG_pointer_type
.long 144 ; DW_AT_type
.byte 6 ; Abbrev [6] 0x90:0x5 DW_TAG_pointer_type
.long 149 ; DW_AT_type
.byte 5 ; Abbrev [5] 0x95:0x7 DW_TAG_base_type
.long 155 ; DW_AT_name
.byte 6 ; DW_AT_encoding
.byte 1 ; DW_AT_byte_size
.byte 5 ; Abbrev [5] 0x9c:0x7 DW_TAG_base_type
.long 173 ; DW_AT_name
.byte 2 ; DW_AT_encoding
.byte 1 ; DW_AT_byte_size
.byte 0 ; End Of Children Mark
Ldebug_info_end0:
.section __DWARF,__debug_str,regular,debug
Linfo_string:
.asciz "Apple clang version 12.0.5 (clang-1205.0.22.9)" ; string offset=0
.asciz "better.c" ; string offset=47
.asciz "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk" ; string offset=56
.asciz "MacOSX.sdk" ; string offset=108
.asciz "/Users/mrowe/src" ; string offset=119
.asciz "main" ; string offset=136
.asciz "int" ; string offset=141
.asciz "argc" ; string offset=145
.asciz "argv" ; string offset=150
.asciz "char" ; string offset=155
.asciz "c" ; string offset=160
.asciz "cIsGreater" ; string offset=162
.asciz "_Bool" ; string offset=173
.section __DWARF,__apple_names,regular,debug
Lnames_begin:
.long 1212240712 ; Header Magic
.short 1 ; Header Version
.short 0 ; Header Hash Function
.long 1 ; Header Bucket Count
.long 1 ; Header Hash Count
.long 12 ; Header Data Length
.long 0 ; HeaderData Die Offset Base
.long 1 ; HeaderData Atom Count
.short 1 ; DW_ATOM_die_offset
.short 6 ; DW_FORM_data4
.long 0 ; Bucket 0
.long 2090499946 ; Hash in Bucket 0
.set Lset5, LNames0-Lnames_begin ; Offset in Bucket 0
.long Lset5
LNames0:
.long 136 ; main
.long 1 ; Num DIEs
.long 50
.long 0
.section __DWARF,__apple_objc,regular,debug
Lobjc_begin:
.long 1212240712 ; Header Magic
.short 1 ; Header Version
.short 0 ; Header Hash Function
.long 1 ; Header Bucket Count
.long 0 ; Header Hash Count
.long 12 ; Header Data Length
.long 0 ; HeaderData Die Offset Base
.long 1 ; HeaderData Atom Count
.short 1 ; DW_ATOM_die_offset
.short 6 ; DW_FORM_data4
.long -1 ; Bucket 0
.section __DWARF,__apple_namespac,regular,debug
Lnamespac_begin:
.long 1212240712 ; Header Magic
.short 1 ; Header Version
.short 0 ; Header Hash Function
.long 1 ; Header Bucket Count
.long 0 ; Header Hash Count
.long 12 ; Header Data Length
.long 0 ; HeaderData Die Offset Base
.long 1 ; HeaderData Atom Count
.short 1 ; DW_ATOM_die_offset
.short 6 ; DW_FORM_data4
.long -1 ; Bucket 0
.section __DWARF,__apple_types,regular,debug
Ltypes_begin:
.long 1212240712 ; Header Magic
.short 1 ; Header Version
.short 0 ; Header Hash Function
.long 3 ; Header Bucket Count
.long 3 ; Header Hash Count
.long 20 ; Header Data Length
.long 0 ; HeaderData Die Offset Base
.long 3 ; HeaderData Atom Count
.short 1 ; DW_ATOM_die_offset
.short 6 ; DW_FORM_data4
.short 3 ; DW_ATOM_die_tag
.short 5 ; DW_FORM_data2
.short 4 ; DW_ATOM_type_flags
.short 11 ; DW_FORM_data1
.long -1 ; Bucket 0
.long -1 ; Bucket 1
.long 0 ; Bucket 2
.long 193495088 ; Hash in Bucket 2
.long 249311216 ; Hash in Bucket 2
.long 2090147939 ; Hash in Bucket 2
.set Lset6, Ltypes0-Ltypes_begin ; Offset in Bucket 2
.long Lset6
.set Lset7, Ltypes1-Ltypes_begin ; Offset in Bucket 2
.long Lset7
.set Lset8, Ltypes2-Ltypes_begin ; Offset in Bucket 2
.long Lset8
Ltypes0:
.long 141 ; int
.long 1 ; Num DIEs
.long 132
.short 36
.byte 0
.long 0
Ltypes1:
.long 173 ; _Bool
.long 1 ; Num DIEs
.long 156
.short 36
.byte 0
.long 0
Ltypes2:
.long 155 ; char
.long 1 ; Num DIEs
.long 149
.short 36
.byte 0
.long 0
.subsections_via_symbols
.section __DWARF,__debug_line,regular,debug
Lsection_line:
Lline_table_start0:
Raw
better.c
#include <stdio.h>
#include <stdbool.h>
int main(int argc, char* argv[]) {
printf("Which is greater, C or C++?\nAnswer: ");
int c = 1;
bool cIsGreater = c > c++;
if(cIsGreater) {
printf("C");
} else {
printf("C++");
}
printf("\n");
return 0;
};
Raw
better.s
.section __TEXT,__text,regular,pure_instructions
.build_version macos, 11, 0 sdk_version 11, 3
.globl _main ; -- Begin function main
.p2align 2
_main: ; @main
.cfi_startproc
; %bb.0:
sub sp, sp, #48 ; =48
stp x29, x30, [sp, #32] ; 16-byte Folded Spill
add x29, sp, #32 ; =32
.cfi_def_cfa w29, 16
.cfi_offset w30, -8
.cfi_offset w29, -16
stur wzr, [x29, #-4]
stur w0, [x29, #-8]
str x1, [sp, #16]
adrp x0, l_.str@PAGE
add x0, x0, l_.str@PAGEOFF
bl _printf
mov w8, #1
str w8, [sp, #12]
ldr w9, [sp, #12]
ldr w10, [sp, #12]
add w11, w10, #1 ; =1
str w11, [sp, #12]
subs w9, w9, w10
cset w10, gt
and w8, w10, w8
strb w8, [sp, #11]
ldrb w8, [sp, #11]
tbnz w8, #0, LBB0_1
b LBB0_2
LBB0_1:
adrp x0, l_.str.1@PAGE
add x0, x0, l_.str.1@PAGEOFF
bl _printf
b LBB0_3
LBB0_2:
adrp x0, l_.str.2@PAGE
add x0, x0, l_.str.2@PAGEOFF
bl _printf
LBB0_3:
adrp x0, l_.str.3@PAGE
add x0, x0, l_.str.3@PAGEOFF
bl _printf
mov w8, #0
mov x0, x8
ldp x29, x30, [sp, #32] ; 16-byte Folded Reload
add sp, sp, #48 ; =48
ret
.cfi_endproc
; -- End function
.section __TEXT,__cstring,cstring_literals
l_.str: ; @.str
.asciz "Which is greater, C or C++?\nAnswer: "
l_.str.1: ; @.str.1
.asciz "C"
l_.str.2: ; @.str.2
.asciz "C++"
l_.str.3: ; @.str.3
.asciz "\n"
.subsections_via_symbols
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