diff options
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 0ee4f11..eedea4a 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -5188,10 +5188,26 @@ gen_const_vector_0 (mode) for (i = 0; i < units; ++i) RTVEC_ELT (v, i) = CONST0_RTX (inner); - tem = gen_rtx_CONST_VECTOR (mode, v); + tem = gen_rtx_raw_CONST_VECTOR (mode, v); return tem; } +/* Generate a vector like gen_rtx_raw_CONST_VEC, but use the zero vector when + all elements are zero. */ +rtx +gen_rtx_CONST_VECTOR (mode, v) + enum machine_mode mode; + rtvec v; +{ + rtx inner_zero = CONST0_RTX (GET_MODE_INNER (mode)); + int i; + + for (i = GET_MODE_NUNITS (mode) - 1; i >= 0; i--) + if (RTVEC_ELT (v, i) != inner_zero) + return gen_rtx_raw_CONST_VECTOR (mode, v); + return CONST0_RTX (mode); +} + /* Create some permanent unique rtl objects shared between all functions. LINE_NUMBERS is nonzero if line numbers are to be generated. */ |