testsuite: RISC-V: Add effective target for E ABI variant

Add new effective target check for either ILP32E or ILP64E ABI variants.

Initial implementation only checks for RV32E or RV64E ISA, which in turn
implies that ILP32E/ILP64E ABI is used.  The RV32I+ILP32E and
RV64I+ILP64E combinations are not yet caught by the check, but they
do not seem to be widely used currently.

gcc/testsuite/ChangeLog:

	* lib/target-supports.exp (check_effective_target_riscv_abi_e):
	New procedure.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 45ba2f47a9d1868e5115326cd0dabb63644e9458..0ff00d189ff5d78ea6f8e19ae5766191d6887b8d 100644 (file)
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -1904,6 +1904,26 @@ proc check_effective_target_riscv_a { } {
     }]
 }
 
+# Return 1 if the ABI is either ILP32E or ILP64E, 0 otherwise.
+# Cache the result.
+
+proc check_effective_target_riscv_abi_e { } {
+    # If current ISA is E, then only E ABI is supported.
+    if { [check_no_compiler_messages riscv_abi_e assembly {
+       #ifndef __riscv_e
+       #error "Not __riscv_e"
+       #endif
+       }] } {
+           return 1
+       }
+
+    # E ABI can be chosen by both E and I base ISA variants.
+    #
+    # TODO - check for I ISA and E ABI combination.
+
+    return 0
+}
+
 # Return 1 if the target arch supports the atomic LRSC extension, 0 otherwise.
 # Cache the result.