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-rw-r--r--gcc/ChangeLog5
-rw-r--r--gcc/tree.c3
2 files changed, 8 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4198461..be2fac7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
2019-11-18 Richard Sandiford <richard.sandiford@arm.com>
+ * tree.c (build_vector_from_ctor): Directly return a zero vector for
+ empty constructors.
+
+2019-11-18 Richard Sandiford <richard.sandiford@arm.com>
+
* cse.c (cse_insn): Delete no-op register moves too.
* simplify-rtx.c (comparison_to_mask): Handle unsigned comparisons.
Take a second comparison to control the value for NE.
diff --git a/gcc/tree.c b/gcc/tree.c
index 4db3fa8..f9ea79d 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -1858,6 +1858,9 @@ make_vector (unsigned log2_npatterns,
tree
build_vector_from_ctor (tree type, vec<constructor_elt, va_gc> *v)
{
+ if (vec_safe_length (v) == 0)
+ return build_zero_cst (type);
+
unsigned HOST_WIDE_INT idx, nelts;
tree value;