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emit-rtl.c (gen_lowpart): Don't force MEMs into a register unless the register lowpart is a...

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* emit-rtl.c (gen_lowpart): Don't force MEMs into a register unless
	the register lowpart is a TRULY_NOOP_TRUNCATION.

From-SVN: r73731
This commit is contained in:
Richard Sandiford 2003-11-19 08:23:43 +00:00 • committed by Richard Sandiford
parent d4c32b6fca
commit 90db942b27
2 changed files with 7 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2003-11-19 Richard SAndiford <rsandifo@redhat.com>
* emit-rtl.c (gen_lowpart): Don't force MEMs into a register unless
the register lowpart is a TRULY_NOOP_TRUNCATION.
2003-11-19 Richard Henderson <rth@redhat.com>
* config/i386/i386.c (print_reg): Handle QI and HI modes for

2
gcc/emit-rtl.c
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@ -1356,6 +1356,8 @@ gen_lowpart (enum machine_mode mode, rtx x)
/* The following exposes the use of "x" to CSE. */
if (GET_MODE_SIZE (GET_MODE (x)) <= UNITS_PER_WORD
&& SCALAR_INT_MODE_P (GET_MODE (x))
&& TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode),
GET_MODE_BITSIZE (GET_MODE (x)))
&& ! no_new_pseudos)
return gen_lowpart (mode, force_reg (GET_MODE (x), x));