Currently, gen_ctf_base_type will obtain the bit_size of a given DWARF DIE based
on the system GCC is compiling for. For DIEs with a DW_ATE_float encoding, this
is used to determine whether to classify a given DIE as a single, double, or
long double. However, on some systems, a long double will not have a bit_size
of 128 (usually it will be 80). This means that a __float128 (_Float128) type
will not be classified as a long double, and will actually be dropped entirely.
This patch makes an explicit check for a float with a bit_size of 128, in order
to handle __float128 types. A test has also been added to ensure that this type
generates appropriate CTF information.
gcc/ChangeLog:
* dwarf2ctf.cc (gen_ctf_base_type): encode CTF_FP_LDOUBLE if bit_size
== 128.
gcc/testsuite/ChangeLog:
* gcc.dg/debug/ctf/ctf-float128.c: New test.
Signed-off-by: Bruce McCulloch <bruce.mccull...@oracle.com>
---
gcc/dwarf2ctf.cc | 2 +-
gcc/testsuite/gcc.dg/debug/ctf/ctf-float128.c | 11 +++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.dg/debug/ctf/ctf-float128.c
diff --git a/gcc/dwarf2ctf.cc b/gcc/dwarf2ctf.cc
index 7de3696a4d7..fd326b320af 100644
--- a/gcc/dwarf2ctf.cc
+++ b/gcc/dwarf2ctf.cc
@@ -262,7 +262,7 @@ gen_ctf_base_type (ctf_container_ref ctfc, dw_die_ref type)
ctf_encoding.cte_format = CTF_FP_SINGLE;
else if (bit_size == double_bit_size)
ctf_encoding.cte_format = CTF_FP_DOUBLE;
- else if (bit_size == long_double_bit_size)
+ else if ((bit_size == long_double_bit_size) || (bit_size == 128))
ctf_encoding.cte_format = CTF_FP_LDOUBLE;
else
/* CTF does not have representation for other types. Skip them. */
diff --git a/gcc/testsuite/gcc.dg/debug/ctf/ctf-float128.c
b/gcc/testsuite/gcc.dg/debug/ctf/ctf-float128.c
new file mode 100644
index 00000000000..50240d2d6cf
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/debug/ctf/ctf-float128.c
@@ -0,0 +1,11 @@
+/* Tests for CTF __float128 type.
+ - Verify that there is a long double record. */
+
+/* { dg-do compile } */
+/* { dg-options "-O0 -gctf -dA" } */
+/* { dg-additional-options "-m32" { target { i?86-*-* x86_64-*-* } } }*/
+/* { dg-require-effective-target __float128 } */
+/* { dg-final { scan-assembler-times ".long\[ \t\]+0xa000000\[ \t\]+\[^\n\]*#
ctt_info" 1} } */
+/* { dg-final { scan-assembler-times "ascii \"_Float128.0\"\[\t
\]+\[^\n\]*ctf_string" 1 } } */
+
+__float128 a = 100;
--
2.43.5
