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re PR target/18701 (mmix-knuth-mmixware gcc.c-torture/execute failures: 20010224-1.c, 20020216-1.c, 20040218-1.c, 20040709-2.c) 

PR target/18701
	* combine.c (gen_lowpart_for_combine): When stripping SUBREG of
	MEM, adjust imode and isize.

From-SVN: r92760
This commit is contained in:
Hans-Peter Nilsson 2004-12-31 16:24:48 +00:00 committed by Hans-Peter Nilsson
parent 8c8a5f7c8e
commit 32f2ce0299
2 changed files with 15 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-12-31 Hans-Peter Nilsson <hp@bitrange.com>
PR target/18701
* combine.c (gen_lowpart_for_combine): When stripping SUBREG of
MEM, adjust imode and isize.
2004-12-30 Richard Henderson <rth@redhat.com>
* config/ia64/ia64.c (hfa_element_mode): Return false for

10
gcc/combine.c
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@ -9355,8 +9355,16 @@ gen_lowpart_for_combine (enum machine_mode omode, rtx x)
if (GET_CODE (x) == SUBREG && MEM_P (SUBREG_REG (x)))
{
x = SUBREG_REG (x);
if (GET_MODE (x) == omode)
/* For use in case we fall down into the address adjustments
further below, we need to adjust the known mode and size of
x; imode and isize, since we just adjusted x. */
imode = GET_MODE (x);
if (imode == omode)
return x;
isize = GET_MODE_SIZE (imode);
}
result = gen_lowpart_common (omode, x);