search for: ogtpy

...ed by Microsoft (R) Optimizing Compiler Version 14.00.50727.762 TITLE C:\msys\1.0\home\mteixeira\testeadvpl.c .686P .XMM include listing.inc .model flat INCLUDELIB LIBCMT INCLUDELIB OLDNAMES _DATA SEGMENT COMM _tini:DWORD COMM _tfim:DWORD _DATA ENDS PUBLIC _TESTE ; Function compile flags: /Ogtpy ; File c:\msys\1.0\home\mteixeira\testeadvpl.c ; COMDAT _TESTE _TEXT SEGMENT _parami$ = 8 ; size = 4 _paraml$ = 12 ; size = 4 _paramd$ = 16 ; size = 8 _TESTE PROC ; COMDAT ; 6 : int varx=0,vary=0; ; 7 : int nI =0; ; 8 : //varx= parami; ; 9 : if( parami &gt...

...rx.1.lcssa = phi i32 [ %varx.110, %entry ], [ %phitmp, %bb5.loopexit ] ; <i32> [#uses=1] %5 = add i32 %paraml, 5 ; <i32> [#uses=1] %6 = add i32 %5, %varx.1.lcssa ; <i32> [#uses=1] ret i32 %6 } While the MSVC generates the assemble : PUBLIC _TESTE ; Function compile flags: /Ogtpy ; File c:\msys\1.0\home\mteixeira\testeadvpl.c ; COMDAT _TESTE _TEXT SEGMENT _parami$ = 8 ; size = 4 _paraml$ = 12 ; size = 4 _paramd$ = 16 ; size = 8 _TESTE PROC ; COMDAT ; 6 : int varx=0,vary; ; 7 : int nI =0; ; 8 : //varx= parami; ; 9 : if( parami >...

...e (and it needs tests). thread_local.c: #ifdef _MSC_VER #define __thread __declspec(thread) #endif __thread int i = 0; int foo() { return i++; } thread_local.asm: PUBLIC _i _TLS SEGMENT _i DD 00H _TLS ENDS PUBLIC _foo EXTRN __tls_array:DWORD EXTRN __tls_index:DWORD ; Function compile flags: /Ogtpy _TEXT SEGMENT _foo PROC ; File c:\users\mspencer\projects\llvm-project\test\thread_local.c ; Line 7 mov eax, DWORD PTR __tls_index mov ecx, DWORD PTR fs:__tls_array mov ecx, DWORD PTR [ecx+eax*4] mov eax, DWORD PTR _i[ecx] lea edx, DWORD PTR [eax+1] mov DWORD PTR _i[ecx], edx ; Line 8 ret 0...

Hi! LLVM currently does not implement the implicit TLS model on Windows. This model is easy: - a thread local variable ends up in the .tls section - to access a thread local variable, you have to do (1) load pointer to thread local storage from TEB On x86_64, this is gs:0x58, on x86 it is fs:0x2C. (2) load pointer to thread local state. In general, the index is stored in variable

...7, %edx # imm = 0x38E38E39 movl %ecx, %eax imull %edx movl %edx, %eax shrl $31, %eax sarl $2, %edx addl %eax, %edx imull $18, %edx, %eax subl %eax, %ecx movl %ecx, %eax ret The visual studio compiler (/O2) instead issues the idiv instruction: PUBLIC _f ; Function compile flags: /Ogtpy ; COMDAT _f _TEXT SEGMENT _n$ = 8 ; size = 4 _f PROC ; COMDAT ; File c:\a.c ; Line 6 mov eax, DWORD PTR _n$[esp-4] inc eax cdq mov ecx, 18 ; 00000012H idiv ecx mov eax, edx ; Line 7 ret 0 _f ENDP _TEXT ENDS END

...LCFI3: movl 8(%ebp), %ebx movl %ebx, (%esp) call __Z3barv pushl %eax movl %ebx, %eax movl -4(%ebp), %ebx leave ret $4 This is the result of cl -O2 -c -Fa (again, focus on the final `ret') PUBLIC ?foo@@YA?AUS@@XZ ; foo EXTRN ?bar@@YA?AUS@@XZ:PROC ; bar ; Function compile flags: /Ogtpy ; COMDAT ?foo@@YA?AUS@@XZ _TEXT SEGMENT $T2548 = -16 ; size = 16 $T2546 = 8 ; size = 4 ?foo@@YA?AUS@@XZ PROC ; foo, COMDAT ; File c:\dev\exp\bar.cpp ; Line 8 sub esp, 16 ; 00000010H ; Line 9 lea eax, DWORD PTR $T2548[esp+16] push eax call ?bar@@YA?AUS@@XZ ; bar mov ecx, DWO...