OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

poly_int: expand_ifn_atomic_compare_exchange_into_call

Browse Source 
This patch makes the mode size assumptions in
expand_ifn_atomic_compare_exchange_into_call a bit more
explicit, so that a later patch can add a to_constant () call.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* builtins.c (expand_ifn_atomic_compare_exchange_into_call): Assert
	that the mode size is in the set {1, 2, 4, 8, 16}.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r256157
This commit is contained in:
Richard Sandiford 2018-01-03 07:18:28 +00:00 committed by Richard Sandiford
parent 0f5d092808
commit 4871e1ed17
2 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2018-01-03 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
* builtins.c (expand_ifn_atomic_compare_exchange_into_call): Assert
that the mode size is in the set {1, 2, 4, 8, 16}.
2018-01-03 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>

5
gcc/builtins.c
View File

@ -5990,9 +5990,12 @@ expand_ifn_atomic_compare_exchange_into_call (gcall *call, machine_mode mode)
/* Skip the boolean weak parameter. */
for (z = 4; z < 6; z++)
vec->quick_push (gimple_call_arg (call, z));
/* At present we only have BUILT_IN_ATOMIC_COMPARE_EXCHANGE_{1,2,4,8,16}. */
unsigned int bytes_log2 = exact_log2 (GET_MODE_SIZE (mode));
gcc_assert (bytes_log2 < 5);
built_in_function fncode
= (built_in_function) ((int) BUILT_IN_ATOMIC_COMPARE_EXCHANGE_1
+ exact_log2 (GET_MODE_SIZE (mode)));
+ bytes_log2);
tree fndecl = builtin_decl_explicit (fncode);
tree fn = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fndecl)),
fndecl);