LI77637: INLINE ASM PARSING LABEL INCORRECTLY

XL C/C++ for Linux Fix Pack 8 (October 2015 Update) for 12.1
XL C/C++ for Linux Fix Pack 4 (October 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 5 (December 2013 Update) for 12.1
XL C/C++ for Linux Fix Pack 6 (February 2014 Update) for 12.1
XL C/C++ for Linux Fix Pack 7 (May 2014 Update) for 12.1

APAR status

• Closed as program error.

Error description

• A simple inline ASM branch instruction to a label is causing a
  compile-time assembler error.
  
  
     ===== TEST CASE =====
  
  int main()
  {
     int test;
  
     asm("   li %0,0    \n"
         "   bc 7,27,1f \n"
         "   li %0,1    \n"
         "1: \n"
         :  "=r"(test) );
  }
  
  
  $ xlc test.c
  Assembler:
  test$1.s: line 49: 1252-142 Syntax error.
  1500-067:(S) asm statement generates errors in assembler output.
  $
  
  The generated intermediate 'test$1.s' assembler file contains
  the following processed inline ASM:
  
     +48     li 0,0
     +49     bc 7,27,1f
     +50     li 0,1
     +51  .LL1_0:
  
  The '1f' branch label is not processed correctly, causing the
  assembler syntax error.
  

Local fix

• - Add a space character between the comma and label in the
  inline ASM branch instruction
  - Use a label that does not begin with a digit character
  

Problem summary

• USERS AFFECTED:
  Users writing inline ASM using local labels.
  

Problem conclusion

• The compiler was corrected to support local labels next to
  comma characters.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV45186

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5725C7300

Applicable component levels

• RC10 PSN IV45186

     UP06/09/13