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-rw-r--r--gcc/common/config/riscv/riscv-common.c8
-rw-r--r--gcc/testsuite/gcc.target/riscv/arch-7.c6
-rw-r--r--gcc/testsuite/gcc.target/riscv/attribute-10.c2
3 files changed, 15 insertions, 1 deletions
diff --git a/gcc/common/config/riscv/riscv-common.c b/gcc/common/config/riscv/riscv-common.c
index b84503a..84695a6 100644
--- a/gcc/common/config/riscv/riscv-common.c
+++ b/gcc/common/config/riscv/riscv-common.c
@@ -524,6 +524,14 @@ riscv_subset_list::parse_multiletter_ext (const char *p,
*q = '\0';
+ if (strlen (subset) == 1)
+ {
+ error_at (m_loc, "%<-march=%s%>: name of %s must be more than 1 letter",
+ m_arch, ext_type_str);
+ free (subset);
+ return NULL;
+ }
+
add (subset, major_version, minor_version, explicit_version_p);
free (subset);
p += end_of_version - subset;
diff --git a/gcc/testsuite/gcc.target/riscv/arch-7.c b/gcc/testsuite/gcc.target/riscv/arch-7.c
new file mode 100644
index 0000000..74ab248
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/arch-7.c
@@ -0,0 +1,6 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -march=rv32i -march=rv32im_s -mabi=ilp32" } */
+int foo()
+{
+}
+/* { dg-error ".'-march=rv32im_s': name of supervisor extension must be more than 1 letter" "" { target *-*-* } 0 } */
diff --git a/gcc/testsuite/gcc.target/riscv/attribute-10.c b/gcc/testsuite/gcc.target/riscv/attribute-10.c
index a874a62..26fdd08 100644
--- a/gcc/testsuite/gcc.target/riscv/attribute-10.c
+++ b/gcc/testsuite/gcc.target/riscv/attribute-10.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -march=rv32i -march=rv32im_s_sx_unexpectedstring -mabi=ilp32" } */
+/* { dg-options "-O2 -march=rv32i -march=rv32im_sx_unexpectedstring -mabi=ilp32" } */
int foo()
{
}