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re PR target/38056 (Missed tail calls on ia64)

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PR target/38056
	* config/ia64/ia64.c (ia64_function_ok_for_sibcall): Check
	TARGET_CONST_GP.
	* gcc.target/ia64/sibcall-opt-1.c: New test.
	* gcc.target/ia64/sibcall-opt-2.c: New test.

From-SVN: r144168
This commit is contained in:
Steve Ellcey 2009-02-13 21:59:32 +00:00 committed by Steve Ellcey
parent 686c82b505
commit c208436c7b
5 changed files with 39 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2009-02-13 Steve Ellcey <sje@cup.hp.com>
PR target/38056
* config/ia64/ia64.c (ia64_function_ok_for_sibcall): Check
TARGET_CONST_GP.
2009-02-13 H.J. Lu <hongjiu.lu@intel.com>
PR target/39149

5
gcc/config/ia64/ia64.c
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@ -4365,8 +4365,9 @@ ia64_function_ok_for_sibcall (tree decl, tree exp ATTRIBUTE_UNUSED)
return false;
/* We must always return with our current GP. This means we can
only sibcall to functions defined in the current module. */
return decl && (*targetm.binds_local_p) (decl);
only sibcall to functions defined in the current module unless
TARGET_CONST_GP is set to true. */
return (decl && (*targetm.binds_local_p) (decl)) || TARGET_CONST_GP;
}

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2009-02-13 Steve Ellcey <sje@cup.hp.com>
PR target/38056
* gcc.target/ia64/sibcall-opt-1.c: New test.
* gcc.target/ia64/sibcall-opt-2.c: New test.
2009-02-13 Paul Thomas <pault@gcc.gnu.org>
PR fortran/36528

12
gcc/testsuite/gcc.target/ia64/sibcall-opt-1.c Normal file
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@ -0,0 +1,12 @@
/* PR target/38056. Do not do sibcall optimization across object file
boundery when -mconstant-gp is not used. */
/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-final { scan-assembler "br.call.*bar" } } */
int bar(int x);
int foo(int x)
{
return (bar(x + 1));
}

12
gcc/testsuite/gcc.target/ia64/sibcall-opt-2.c Normal file
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@ -0,0 +1,12 @@
/* PR target/38056. Do sibcall optimization across object file
boundery when -mconstant-gp is used. */
/* { dg-do compile } */
/* { dg-options "-O2 -mconstant-gp" } */
/* { dg-final { scan-assembler-not "br.call.*bar" } } */
int bar(int x);
int foo(int x)
{
return (bar(x + 1));
}