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</o:shapelayout></xml><![endif]--></head><body lang=RU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi, all.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I am generating LLVM IR code for x64 platform using LLVM 64bit libraries , and for some reason I need to move to 32bit.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>But after building 32bit libraries I found that IR code generates incorrectly and it causes segfault.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>For example, instead of generating function call it generates function phi.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>64bit libs:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>init: ; preds = %pre_entry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> call void @Init()<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> br label %entry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>32bit libs:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>init:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> phi void [ @Init(), <null operand!> ]<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> br label entry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Or other example. Instead of this:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>lpad: ; preds = %entry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %lpad1 = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> catch i8* bitcast (i8** @_ZTIPKc to i8*)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %exn = extractvalue { i8*, i32 } %lpad1, 0 <------<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> store i8* %exn, i8** %exn.slot<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %ehselector = extractvalue { i8*, i32 } %lpad1, 1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> store i32 %ehselector, i32* %ehselector.slot<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> br label %catch<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>catch: ; preds = %lpad<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %exn2 = load i8** %exn.slot<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %1 = call i8* @__cxa_begin_catch(i8* %exn2)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> call void (i8*, ...)* @_printf(i8* %1) <--------<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> br label %ret<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I get this code:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>lpad: ; preds = %entry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %lpad1 = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> catch i8* bitcast (i8** @_ZTIPKc to i8*)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %exn = shufflevector { i8*, i32 } %lpad1 <---------<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> store i8* %exn, i8** %exn.slot<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %ehselector = shufflevector { i8*, i32 } %lpad1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> store i32 %ehselector, i32* %ehselector.slot<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> br label %catch<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>catch: ; preds = %lpad<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %exn2 = load i8** %exn.slot<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> %1 = phi i8* [ %exn2, <null operand!> ], [ @__cxa_begin_catch, Segmentation fault (core dumped)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Anyone can tell me what is it? Is it a bug of LLVM or our codegen?<o:p></o:p></span></p></div></body></html>