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'''
Processes an LLVM assembly (.ll) file, adding debugging information.
You can then run the .ll file in the LLVM interpreter (lli) and
compare that to the output when compiled using emscripten.
'''
import os, sys, re
ALLOW_POINTERS = False
MEMCPY = False
POSTAMBLE = '''
@.emscripten.autodebug.str = private constant [10 x i8] c"AD:%d,%d\\0A\\00", align 1 ; [#uses=1]
@.emscripten.autodebug.str.f = private constant [11 x i8] c"AD:%d,%lf\\0A\\00", align 1 ; [#uses=1]
; [#uses=1]
define void @emscripten_autodebug_i64(i32 %line, i64 %value) {
entry:
%0 = sitofp i64 %value to double ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i32(i32 %line, i32 %value) {
entry:
%0 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %value) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i16(i32 %line, i16 %value) {
entry:
%0 = zext i16 %value to i32 ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i8(i32 %line, i8 %value) {
entry:
%0 = zext i8 %value to i32 ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_float(i32 %line, float %value) {
entry:
%0 = fpext float %value to double ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %0) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
; [#uses=1]
define void @emscripten_autodebug_double(i32 %line, double %value) {
entry:
%0 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %value) ; [#uses=0]
br label %return
return: ; preds = %entry
ret void
}
'''
POSTAMBLE_NEW = '''
@.emscripten.autodebug.str = private constant [10 x i8] c"AD:%d,%d\\0A\\00", align 1 ; [#uses=1]
@.emscripten.autodebug.str.f = private constant [11 x i8] c"AD:%d,%lf\\0A\\00", align 1 ; [#uses=1]
; [#uses=1]
define void @emscripten_autodebug_i64(i32 %line, i64 %value) {
%1 = sitofp i64 %value to double
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i32(i32 %line, i32 %value) {
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %value) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i16(i32 %line, i16 %value) {
%1 = zext i16 %value to i32 ; [#uses=1]
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_i8(i32 %line, i8 %value) {
%1 = zext i8 %value to i32 ; [#uses=1]
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([10 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_float(i32 %line, float %value) {
%1 = fpext float %value to double ; [#uses=1]
%2 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %1) ; [#uses=0]
ret void
}
; [#uses=1]
define void @emscripten_autodebug_double(i32 %line, double %value) {
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([11 x i8]* @.emscripten.autodebug.str.f, i32 0, i32 0), i32 %line, double %value) ; [#uses=0]
ret void
}
'''
filename, ofilename = sys.argv[1], sys.argv[2]
f = open(filename, 'r')
data = f.read()
f.close()
if 'declare i32 @printf(' not in data:
POSTAMBLE += '''
; [#uses=1]
declare i32 @printf(i8*, ...)
'''
LLVM_STYLE_OLD = '<label>' not in data and 'entry:' in data
if not LLVM_STYLE_OLD:
POSTAMBLE = POSTAMBLE_NEW
if MEMCPY:
POSTAMBLE = '''
@.emscripten.memcpy.str = private constant [7 x i8] c"MC:%d\\0A\\00", align 1 ; [#uses=1]
''' + POSTAMBLE + '''
; [#uses=1]
define void @emscripten_memcpy(i8* %destination, i8* %source, i32 %num, i32 %whati, i1 %sthis) nounwind {
entry:
%destination.addr = alloca i8*, align 4 ; [#uses=3]
%source.addr = alloca i8*, align 4 ; [#uses=2]
%num.addr = alloca i32, align 4 ; [#uses=3]
%i = alloca i32, align 4 ; [#uses=5]
%src = alloca i8*, align 4 ; [#uses=5]
%dst = alloca i8*, align 4 ; [#uses=4]
store i8* %destination, i8** %destination.addr, align 4
store i8* %source, i8** %source.addr, align 4
store i32 %num, i32* %num.addr, align 4
%tmp = load i8** %source.addr, align 4 ; [#uses=1]
store i8* %tmp, i8** %src, align 4
%tmp2 = load i8** %destination.addr, align 4 ; [#uses=1]
store i8* %tmp2, i8** %dst, align 4
store i32 0, i32* %i, align 4
%tmp31 = load i32* %i, align 4 ; [#uses=1]
%tmp42 = load i32* %num.addr, align 4 ; [#uses=1]
%cmp3 = icmp ult i32 %tmp31, %tmp42 ; [#uses=1]
br i1 %cmp3, label %for.body, label %for.end
for.body: ; preds = %for.body, %entry
%tmp5 = load i8** %src, align 4 ; [#uses=1]
%tmp6 = load i8* %tmp5 ; [#uses=1]
%conv = zext i8 %tmp6 to i32 ; [#uses=1]
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([7 x i8]* @.emscripten.memcpy.str, i32 0, i32 0), i32 %conv); [#uses=0]
%tmp7 = load i8** %src, align 4 ; [#uses=1]
%tmp8 = load i8* %tmp7 ; [#uses=1]
%tmp9 = load i8** %dst, align 4 ; [#uses=1]
store i8 %tmp8, i8* %tmp9
%tmp10 = load i32* %i, align 4 ; [#uses=1]
%inc = add i32 %tmp10, 1 ; [#uses=1]
store i32 %inc, i32* %i, align 4
%tmp11 = load i8** %src, align 4 ; [#uses=1]
%incdec.ptr = getelementptr inbounds i8* %tmp11, i32 1 ; [#uses=1]
store i8* %incdec.ptr, i8** %src, align 4
%tmp12 = load i8** %dst, align 4 ; [#uses=1]
%incdec.ptr13 = getelementptr inbounds i8* %tmp12, i32 1 ; [#uses=1]
store i8* %incdec.ptr13, i8** %dst, align 4
%tmp3 = load i32* %i, align 4 ; [#uses=1]
%tmp4 = load i32* %num.addr, align 4 ; [#uses=1]
%cmp = icmp ult i32 %tmp3, %tmp4 ; [#uses=1]
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %for.body, %entry
%tmp14 = load i8** %destination.addr, align 4 ; [#uses=1]
ret void
}
'''
lines_added = 0
lines = data.split('\n')
for i in range(len(lines)):
if MEMCPY:
if not lines[i].startswith('declare void'):
lines[i] = lines[i].replace('@llvm.memcpy.p0i8.p0i8.i32', '@emscripten_memcpy')
m = re.match(' store (?P<type>i64|i32|i16|i8|float|double|%?[\w\.\*]+) (?P<var>%?[\w.+_]+), .*', lines[i])
if m:
index = i+1+lines_added
if m.group('type') in ['i8', 'i16', 'i32', 'i64', 'float', 'double']:
lines[i] += '\n call void @emscripten_autodebug_%s(i32 %d, %s %s)' % (m.group('type'), index, m.group('type'), m.group('var'))
lines_added += 1
elif ALLOW_POINTERS and m.group('type').endswith('*') and m.group('type').count('*') == 1:
lines[i] += '\n %%ead.%d = ptrtoint %s %%%s to i32' % (index, m.group('type'), m.group('var'))
lines[i] += '\n call void @emscripten_autodebug_i32(i32 %d, i32 %%ead.%d)' % (index, index)
lines_added += 2
continue
m = re.match(' %(?P<var>[\w_.]+) = load (?P<type>i64|i32|i16|i8|float|double+)\* [^(].*.*', lines[i])
if m:
index = i+1+lines_added
lines[i] += '\n call void @emscripten_autodebug_%s(i32 %d, %s %%%s)' % (m.group('type'), index, m.group('type'), m.group('var'))
lines_added += 1
f = open(ofilename, 'w')
f.write('\n'.join(lines) + '\n' + POSTAMBLE + '\n')
f.close()
print 'Success.'
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