[branches/google/gcc-4_6_2-mobile] Backported r186168 from branches/google/gcc-4_6. (issue 5991052)

[asharif]

Reviewers: jingyu, bjanakiraman_google.com, dougkwan,

Message:
PTAL.

Description:
2012-04-04   Ahmad Sharif  <asha...@google.com>

        Backport from mainline r179661, r179662.

        2011-10-07  Andrew Stubbs  <a...@codesourcery.com>

        gcc/
        * config/arm/predicates.md (shift_amount_operand): Remove constant
        range check.
        (shift_operator): Check range of constants for all shift operators.

        gcc/testsuite/
        * gcc.dg/pr50193-1.c: New file.
        * gcc.target/arm/shiftable.c: New file.


Please review this at http://codereview.appspot.com/5991052/

Affected files:
   M    .
  M     gcc/ChangeLog
  M     gcc/ChangeLog.google-4_6
  M     gcc/config/arm/predicates.md
  M     gcc/testsuite/ChangeLog
  A  +  gcc/testsuite/gcc.dg/pr50193-1.c
  A  +  gcc/testsuite/gcc.target/arm/shiftable.c