int produce(void);
void myEntry(void)
{
int y;
switch (produce())
{
case 0:
y = 0;
break;
case 1:
y = 33;
break;
}
}; ModuleID = '/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c'
source_filename = "/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
; Function Attrs: noinline nounwind optnone uwtable
define dso_local void @myEntry() #0 {
%1 = alloca i32, align 4
%2 = call i32 @produce()
switch i32 %2, label %5 [
i32 0, label %3
i32 1, label %4
]
3: ; preds = %0
store i32 0, i32* %1, align 4
br label %5
4: ; preds = %0
store i32 33, i32* %1, align 4
br label %5
5: ; preds = %0, %4, %3
ret void
}
declare dso_local i32 @produce() #1
attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"Debian clang version 11.0.1-2"}
; ModuleID = '/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c'
source_filename = "/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"
; Function Attrs: noinline nounwind optnone uwtable
define dso_local void @myEntry() #0 !dbg !7 {
%1 = alloca i32, align 4
call void @llvm.dbg.declare(metadata i32* %1, metadata !11, metadata !DIExpression()), !dbg !13
%2 = call i32 @produce(), !dbg !14
switch i32 %2, label %5 [
i32 0, label %3
i32 1, label %4
], !dbg !15
3: ; preds = %0
store i32 0, i32* %1, align 4, !dbg !16
br label %5, !dbg !18
4: ; preds = %0
store i32 33, i32* %1, align 4, !dbg !19
br label %5, !dbg !20
5: ; preds = %0, %4, %3
ret void, !dbg !21
}
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare dso_local i32 @produce() #2
attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone speculatable willreturn }
attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "Debian clang version 11.0.1-2", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c", directory: "/__w/semicompiled/semicompiled")
!2 = !{}
!3 = !{i32 7, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!"Debian clang version 11.0.1-2"}
!7 = distinct !DISubprogram(name: "myEntry", scope: !8, file: !8, line: 2, type: !9, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!8 = !DIFile(filename: "/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c", directory: "")
!9 = !DISubroutineType(types: !10)
!10 = !{null}
!11 = !DILocalVariable(name: "y", scope: !7, file: !8, line: 4, type: !12)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !DILocation(line: 4, column: 9, scope: !7)
!14 = !DILocation(line: 5, column: 13, scope: !7)
!15 = !DILocation(line: 5, column: 5, scope: !7)
!16 = !DILocation(line: 8, column: 11, scope: !17)
!17 = distinct !DILexicalBlock(scope: !7, file: !8, line: 6, column: 5)
!18 = !DILocation(line: 9, column: 9, scope: !17)
!19 = !DILocation(line: 11, column: 11, scope: !17)
!20 = !DILocation(line: 12, column: 9, scope: !17)
!21 = !DILocation(line: 14, column: 1, scope: !7)
(module
(type (;0;) (func))
(type (;1;) (func (result i32)))
(import "env" "produce" (func (;0;) (type 1)))
(import "env" "__stack_pointer" (global (;0;) (mut i32)))
(import "env" "__memory_base" (global (;1;) i32))
(import "env" "__table_base" (global (;2;) i32))
(import "env" "memory" (memory (;0;) 0))
(import "env" "__indirect_function_table" (table (;0;) 0 funcref))
(func (;1;) (type 0)
call 2)
(func (;2;) (type 0))
(func (;3;) (type 0)
(local i32 i32 i32 i32 i32 i32 i32 i32 i32)
global.get 0
local.set 0
i32.const 16
local.set 1
local.get 0
local.get 1
i32.sub
local.set 2
local.get 2
global.set 0
call 0
local.set 3
i32.const 1
local.set 4
local.get 3
local.get 4
i32.gt_u
drop
block ;; label = @1
block ;; label = @2
block ;; label = @3
local.get 3
br_table 0 (;@3;) 1 (;@2;) 2 (;@1;)
end
i32.const 0
local.set 5
local.get 2
local.get 5
i32.store offset=12
br 1 (;@1;)
end
i32.const 33
local.set 6
local.get 2
local.get 6
i32.store offset=12
end
i32.const 16
local.set 7
local.get 2
local.get 7
i32.add
local.set 8
local.get 8
global.set 0
return)
(global (;3;) i32 (i32.const 0))
(export "__post_instantiate" (func 1))
(export "__wasm_apply_relocs" (func 2))
(export "myEntry" (func 3))
(export "__dso_handle" (global 3)))
/tmp/semicompiled-A4IoAh9K-9185379345255195644/source.o: file format elf64-bpf
Disassembly of section .text:
0000000000000000 <myEntry>:
; myEntry():
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:5
; switch (produce())
0: call -1
1: r1 = r0
2: r1 <<= 32
3: r1 >>= 32
4: *(u64 *)(r10 - 16) = r0
5: if r1 == 0 goto +6 <LBB0_1>
6: goto +0 <LBB0_4>
0000000000000038 <LBB0_4>:
7: r1 = *(u64 *)(r10 - 16)
8: r1 <<= 32
9: r1 >>= 32
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:5
; switch (produce())
10: if r1 == 1 goto +4 <LBB0_2>
11: goto +6 <LBB0_3>
0000000000000060 <LBB0_1>:
12: r1 = 0
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:8
; y = 0;
13: *(u32 *)(r10 - 4) = r1
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:9
; break;
14: goto +3 <LBB0_3>
0000000000000078 <LBB0_2>:
15: r1 = 33
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:11
; y = 33;
16: *(u32 *)(r10 - 4) = r1
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:12
; break;
17: goto +0 <LBB0_3>
0000000000000090 <LBB0_3>:
; /tmp/semicompiled-A4IoAh9K-9185379345255195644/source.c:14
; }
18: exit
Join the thriving social scene at github.com/andrewbaxter/semicompiled.