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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
POSTAMBLE = '''
@.emscripten.autodebug.str = private constant [21 x i8] c"line: %d, value: %d\\0A\\00", align 1 ; [#uses=1]
; [#uses=1]
define void @emscripten_autodebug_i32(i32 %line, i32 %value) {
entry:
%0 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([21 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_i8(i32 %line, i8 %value) {
entry:
%0 = zext i8 %value to i32 ; [#uses=1]
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([21 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 ([21 x i8]* @.emscripten.autodebug.str, 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 ([21 x i8]* @.emscripten.autodebug.str, 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 [21 x i8] c"line: %d, value: %d\\0A\\00", align 1 ; [#uses=1]
; [#uses=1]
define void @emscripten_autodebug_i32(i32 %line, i32 %value) {
%1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([21 x i8]* @.emscripten.autodebug.str, i32 0, i32 0), i32 %line, i32 %value) ; [#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 ([21 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 ([21 x i8]* @.emscripten.autodebug.str, 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 ([21 x i8]* @.emscripten.autodebug.str, 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
lines_added = 0
lines = data.split('\n')
for i in range(len(lines)):
#if i == 5:
# lines[i] += '\n
m = re.match(' store (?P<type>i64|i32|i16|i8) %(?P<var>[\w.]+), .*', lines[i])
if m and m.group('type') in ['i8', 'i32', 'float', 'double']:
lines[i] += '\n call void @emscripten_autodebug_%s(i32 %d, %s %%%s)' % (m.group('type'), i+1+lines_added, 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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