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i386.c (ix86_split_long_move): Do not handle address used for LEA in a special way.

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* config/i386/i386.c (ix86_split_long_move): Do not handle
	address used for LEA in a special way.

From-SVN: r252984
This commit is contained in:
Uros Bizjak 2017-09-19 20:38:10 +02:00
parent 23b49089a4
commit 684ccf0e11
2 changed files with 10 additions and 36 deletions
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9
gcc/ChangeLog
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@ -1,8 +1,13 @@
2017-09-17 Segher Boessenkool <segher@kernel.crashing.org>
2017-09-19 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (ix86_split_long_move): Do not handle
address used for LEA in a special way.
2017-09-19 Segher Boessenkool <segher@kernel.crashing.org>
* simplify-rtx.c (simplify_binary_operation_1): Fix typo in comment.
2017-09-18 Martin Sebor <msebor@redhat.com>
2017-09-19 Martin Sebor <msebor@redhat.com>
PR c/81854
* cgraphunit.c (handle_alias_pairs): Reject aliases between functions

37
gcc/config/i386/i386.c
View file

@ -26706,7 +26706,7 @@ ix86_split_long_move (rtx operands[])
Do an lea to the last part and use only one colliding move. */
else if (collisions > 1)
{
rtx base, addr, tls_base = NULL_RTX;
rtx base, addr;
collisions = 1;
@ -26723,44 +26723,13 @@ ix86_split_long_move (rtx operands[])
struct ix86_address parts;
int ok = ix86_decompose_address (addr, &parts);
gcc_assert (ok);
if (parts.seg == DEFAULT_TLS_SEG_REG)
{
/* It is not valid to use %gs: or %fs: in
lea though, so we need to remove it from the
address used for lea and add it to each individual
memory loads instead. */
addr = copy_rtx (addr);
rtx *x = &addr;
while (GET_CODE (*x) == PLUS)
{
for (i = 0; i < 2; i++)
{
rtx u = XEXP (*x, i);
if (GET_CODE (u) == ZERO_EXTEND)
u = XEXP (u, 0);
if (GET_CODE (u) == UNSPEC
&& XINT (u, 1) == UNSPEC_TP)
{
tls_base = XEXP (*x, i);
*x = XEXP (*x, 1 - i);
break;
}
}
if (tls_base)
break;
x = &XEXP (*x, 0);
}
gcc_assert (tls_base);
}
/* It is not valid to use %gs: or %fs: in lea. */
gcc_assert (parts.seg == ADDR_SPACE_GENERIC);
}
emit_insn (gen_rtx_SET (base, addr));
if (tls_base)
base = gen_rtx_PLUS (GET_MODE (base), base, tls_base);
part[1][0] = replace_equiv_address (part[1][0], base);
for (i = 1; i < nparts; i++)
{
if (tls_base)
base = copy_rtx (base);
tmp = plus_constant (Pmode, base, UNITS_PER_WORD * i);
part[1][i] = replace_equiv_address (part[1][i], tmp);
}