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Mark -free as Optimization option.

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From-SVN: r279946
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Martin Liska 2020-01-07 10:12:35 +01:00 committed by Martin Liska
parent 5dbaaa20c9
commit a86689f5e9
4 changed files with 68 additions and 4 deletions
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12
gcc/ChangeLog
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@ -1,8 +1,14 @@
2020-01-07 Martin Liska <mliska@suse.cz>
PR optimization/92860
* params.opt: Mark param_min_crossjump_insns with Optimization
keyword.
PR tree-optimization/92860
* common.opt: Make flag_ree as optimization
attribute.
2020-01-07 Martin Liska <mliska@suse.cz>
PR optimization/92860
* params.opt: Mark param_min_crossjump_insns with Optimization
keyword.
2020-01-07 Luo Xiong Hu <luoxhu@linux.ibm.com>

2
gcc/common.opt
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@ -2426,7 +2426,7 @@ Common Ignore
Does nothing. Preserved for backward compatibility.
free
Common Report Var(flag_ree) Init(0)
Common Report Var(flag_ree) Init(0) Optimization
Turn on Redundant Extensions Elimination pass.
fshow-column

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2020-01-07 Martin Liska <mliska@suse.cz>
PR tree-optimization/92860
* gcc.dg/pr92860.c: New test.
2020-01-07 Jakub Jelinek <jakub@redhat.com>
PR c++/91369

53
gcc/testsuite/gcc.dg/pr92860.c Normal file
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@ -0,0 +1,53 @@
/* PR tree-optimization/92860. */
/* Testcase derived from 20111227-1.c to ensure that REE is combining
redundant zero extends with zero extend to wider mode. */
/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-fdump-rtl-ree" } */
extern void abort (void);
unsigned short s;
unsigned int i;
unsigned long l;
unsigned char v = -1;
void
__attribute__ ((optimize("-O2")))
baz()
{
}
void __attribute__((noinline,noclone))
bar (int t)
{
if (t == 2 && s != 0xff)
abort ();
if (t == 1 && i != 0xff)
abort ();
if (t == 0 && l != 0xff)
abort ();
}
void __attribute__((noinline,noclone))
foo (unsigned char *a, int t)
{
unsigned char r = v;
if (t == 2)
s = (unsigned short) r;
else if (t == 1)
i = (unsigned int) r;
else if (t == 0)
l = (unsigned long) r;
bar (t);
}
int main(void)
{
foo (&v, 0);
foo (&v, 1);
foo (&v, 2);
return 0;
}
/* { dg-final { scan-rtl-dump-not "Elimination opportunities" "ree" } } */