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re PR target/63534 (Bootstrap failure on x86_64/i686-linux)

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PR target/63534
	PR target/63618
gcc/
	* cse.c (delete_trivially_dead_insns): Consider PIC register is used
	while it is pseudo.
	* dse.c (deletable_insn_p): Likewise.
gcc/testsuite/
	* gcc.target/i386/pr63618.c: New test.

From-SVN: r216596
This commit is contained in:
Evgeny Stupachenko 2014-10-23 16:52:11 +00:00 • committed by Ilya Verbin
parent 1bc5a4513e
commit 56873e1342
5 changed files with 57 additions and 0 deletions
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8
gcc/ChangeLog
View file

@ -1,3 +1,11 @@
2014-10-23 Evgeny Stupachenko <evstupac@gmail.com>
PR target/63534
PR target/63618
* cse.c (delete_trivially_dead_insns): Consider PIC register is used
while it is pseudo.
* dse.c (deletable_insn_p): Likewise.
2014-10-23 Georg-Johann Lay <avr@gjlay.de>
* config/avr/avr.c: Fix GNU coding rules and typos.

6
gcc/cse.c
View file

@ -6957,6 +6957,12 @@ delete_trivially_dead_insns (rtx_insn *insns, int nreg)
/* If no debug insns can be present, COUNTS is just an array
which counts how many times each pseudo is used. */
}
/* Pseudo PIC register should be considered as used due to possible
new usages generated. */
if (!reload_completed
&& pic_offset_table_rtx
&& REGNO (pic_offset_table_rtx) >= FIRST_PSEUDO_REGISTER)
counts[REGNO (pic_offset_table_rtx)]++;
/* Go from the last insn to the first and delete insns that only set unused
registers or copy a register to itself. As we delete an insn, remove
usage counts for registers it uses.

4
gcc/dce.c
View file

@ -127,6 +127,10 @@ deletable_insn_p (rtx_insn *insn, bool fast, bitmap arg_stores)
if (HARD_REGISTER_NUM_P (DF_REF_REGNO (def))
&& global_regs[DF_REF_REGNO (def)])
return false;
/* Initialization of pseudo PIC register should never be removed. */
else if (DF_REF_REG (def) == pic_offset_table_rtx
&& REGNO (pic_offset_table_rtx) >= FIRST_PSEUDO_REGISTER)
return false;
body = PATTERN (insn);
switch (GET_CODE (body))

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2014-10-23 Evgeny Stupachenko <evstupac@gmail.com>
PR target/63618
* gcc.target/i386/pr63618.c: New test.
2014-10-23 Marek Polacek <polacek@redhat.com>
PR c/63626

34
gcc/testsuite/gcc.target/i386/pr63618.c Normal file
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@ -0,0 +1,34 @@
/* PR target/63618 */
/* { dg-do run } */
/* { dg-options "-O2 -mtune=corei7 -fno-inline" } */
/* { dg-additional-options "-msse4.2" { target sse4 } } */
/* { dg-additional-options "-fpic" { target fpic } } */
static const __float128 cf = 0.1E+10Q;
__float128
f128_square(__float128 x)
{
return x * x;
}
__float128
f128_p3(__float128 x)
{
return x * x * x;
}
__float128
cond_f128_square (__float128 x, int p)
{
x = f128_p3 (x);
if (p)
x = f128_square(cf);
return x;
}
int main()
{
__float128 x = cond_f128_square (cf, 1);
return (int)(x < cf);
}