diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/emit-rtl.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 931f74c..9c1b245 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 9c50e23..a528641 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -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)); |