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re PR target/84710 (ICE: RTL check: expected code 'reg', have 'subreg' in rhs_regno, at rtl.h:1896 with -O -fno-forward-propagate)

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PR target/84710
	* combine.c (try_combine): Use reg_or_subregno instead of handling
	just paradoxical SUBREGs and REGs.

	* gcc.dg/pr84710.c: New test.

From-SVN: r258301
This commit is contained in:
Jakub Jelinek 2018-03-06 21:41:37 +01:00 committed by Jakub Jelinek
parent 284ee475e1
commit 2728bf8f13
4 changed files with 26 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-03-06 Jakub Jelinek <jakub@redhat.com>
PR target/84710
* combine.c (try_combine): Use reg_or_subregno instead of handling
just paradoxical SUBREGs and REGs.
2018-03-06 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.c (arc_finalize_pic): Remove function.

8
gcc/combine.c
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@ -4283,12 +4283,8 @@ try_combine (rtx_insn *i3, rtx_insn *i2, rtx_insn *i1, rtx_insn *i0,
if (GET_CODE (x) == PARALLEL)
x = XVECEXP (newi2pat, 0, 0);
/* It can only be a SET of a REG or of a paradoxical SUBREG of a REG. */
x = SET_DEST (x);
if (paradoxical_subreg_p (x))
x = SUBREG_REG (x);
unsigned int regno = REGNO (x);
/* It can only be a SET of a REG or of a SUBREG of a REG. */
unsigned int regno = reg_or_subregno (SET_DEST (x));
bool done = false;
for (rtx_insn *insn = NEXT_INSN (i3);

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2018-03-06 Jakub Jelinek <jakub@redhat.com>
PR target/84710
* gcc.dg/pr84710.c: New test.
2018-03-06 Steven G. Kargl <kargl@gcc.gnu.org>
PR fortran/56667

13
gcc/testsuite/gcc.dg/pr84710.c Normal file
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@ -0,0 +1,13 @@
/* PR target/84710 */
/* { dg-do compile } */
/* { dg-options "-O -fno-forward-propagate" } */
char a;
int b;
void
foo (void)
{
int d;
b = __builtin_mul_overflow ((char) d, 0xfe, &a);
}