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rs6000.c (rs6000_set_up_by_prologue): Make sure the TOC reg (r2) isn't in the set of registers defined in the prologue.

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* config/rs6000/rs6000.c (rs6000_set_up_by_prologue): Make sure the TOC
	reg (r2) isn't in the set of registers defined in the prologue.

	* gcc.target/powerpc/r2_shrink-wrap.c: New.

From-SVN: r252768
This commit is contained in:
Pat Haugen 2017-09-14 18:29:44 +00:00 • committed by Pat Haugen
parent bc998d034f
commit 44e13e607f
4 changed files with 31 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2017-09-14 Pat Haugen <pthaugen@us.ibm.com>
* config/rs6000/rs6000.c (rs6000_set_up_by_prologue): Make sure the TOC
reg (r2) isn't in the set of registers defined in the prologue.
2017-09-14 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>

5
gcc/config/rs6000/rs6000.c
View file

@ -37804,6 +37804,11 @@ rs6000_set_up_by_prologue (struct hard_reg_set_container *set)
add_to_hard_reg_set (&set->set, Pmode, RS6000_PIC_OFFSET_TABLE_REGNUM);
if (cfun->machine->split_stack_argp_used)
add_to_hard_reg_set (&set->set, Pmode, 12);
/* Make sure the hard reg set doesn't include r2, which was possibly added
via PIC_OFFSET_TABLE_REGNUM. */
if (TARGET_TOC)
remove_from_hard_reg_set (&set->set, Pmode, TOC_REGNUM);
}

4
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,7 @@
2017-09-14 Pat Haugen <pthaugen@us.ibm.com>
* gcc.target/powerpc/r2_shrink-wrap.c: New.
2017-09-14 Will Schmidt <will_schmidt@vnet.ibm.com>
* gcc.target/powerpc/fold-vec-ld-longlong.c: Add

17
gcc/testsuite/gcc.target/powerpc/r2_shrink-wrap.c Normal file
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@ -0,0 +1,17 @@
/* { dg-do compile { target lp64 } } */
/* { dg-options "-O2 -fdump-rtl-pro_and_epilogue" } */
/* Verify we move the prologue past the TOC reference of 'j' and shrink-wrap
the function. */
void bar();
int j;
void foo(int i)
{
j = i;
if (i > 0)
{
bar();
}
}
/* { dg-final { scan-rtl-dump-times "Performing shrink-wrapping" 1 "pro_and_epilogue" } } */