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re PR middle-end/80173 (ICE in store_bit_field_1, at expmed.c:787) 

PR middle-end/80173
	* expmed.c (store_bit_field_1): Don't attempt to create
	a word subreg out of hard registers wider than word if they
	have HARD_REGNO_NREGS of 1 for their mode.

	* gcc.target/i386/pr80173.c: New test.

From-SVN: r246608
This commit is contained in:
Jakub Jelinek 2017-03-31 08:38:35 +02:00 committed by Jakub Jelinek
parent a7d5515419
commit 7d79016545
4 changed files with 38 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,5 +1,10 @@
2017-03-31 Jakub Jelinek <jakub@redhat.com>
PR middle-end/80173
* expmed.c (store_bit_field_1): Don't attempt to create
a word subreg out of hard registers wider than word if they
have HARD_REGNO_NREGS of 1 for their mode.
PR middle-end/80163
* varasm.c (initializer_constant_valid_p_1): Disallow sign-extending
conversions to integer types wider than word and pointer.

10
gcc/expmed.c
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@ -965,8 +965,14 @@ store_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
}
/* If OP0 is a multi-word register, narrow it to the affected word.
If the region spans two words, defer to store_split_bit_field. */
if (!MEM_P (op0) && GET_MODE_SIZE (GET_MODE (op0)) > UNITS_PER_WORD)
If the region spans two words, defer to store_split_bit_field.
Don't do this if op0 is a single hard register wider than word
such as a float or vector register. */
if (!MEM_P (op0)
&& GET_MODE_SIZE (GET_MODE (op0)) > UNITS_PER_WORD
&& (!REG_P (op0)
|| !HARD_REGISTER_P (op0)
|| HARD_REGNO_NREGS (REGNO (op0), GET_MODE (op0)) != 1))
{
if (bitnum % BITS_PER_WORD + bitsize > BITS_PER_WORD)
{

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2017-03-31 Jakub Jelinek <jakub@redhat.com>
PR middle-end/80173
* gcc.target/i386/pr80173.c: New test.
PR middle-end/80163
* gcc.dg/pr80163.c: New test.

22
gcc/testsuite/gcc.target/i386/pr80173.c Normal file
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@ -0,0 +1,22 @@
/* PR middle-end/80173 */
/* { dg-do compile { target lp64 } } */
/* { dg-options "-O2 -ffixed-xmm7" } */
typedef int V __attribute__ ((vector_size (2 * sizeof (int))));
struct U { V a; V b; };
int
foo (int i)
{
register struct U u asm ("xmm7") = {{-1, 0}, {-1, 0}};
return u.b[i];
}
int
bar (int i)
{
register struct U u asm ("xmm7");
u = (struct U) {{-1, 0}, {-1, 0}};
return u.b[i];
}