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[3/4] Mark IFN_UBSAN_CHECK_ADD/MUL as commutative

Message ID mptbl2suqe7.fsf@arm.com
State Committed
Commit 12e38012786d18b21ecb85c5d13b532281206270
Headers show
Series [1/4] Canonicalize argument order for commutative functions | expand

Commit Message

Richard Sandiford Nov. 10, 2021, 12:49 p.m. UTC
Mark IFN_UBSAN_CHECK_ADD/MUL as commutative.

Tested on aarch64-linux-gnu and x86_64-linux-gnu.  OK to install?

Richard


gcc/
	* internal-fn.c (commutative_binary_fn_p): Handle IFN_UBSAN_CHECK_ADD
	and IFN_UBSAN_CHECK_MUL.

gcc/testsuite/
	* gcc.dg/ubsan/commutative-1.c: New test.
---
 gcc/internal-fn.c                          |  2 ++
 gcc/testsuite/gcc.dg/ubsan/commutative-1.c | 30 ++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/ubsan/commutative-1.c

Comments

Jakub Jelinek Nov. 10, 2021, 12:56 p.m. UTC | #1
On Wed, Nov 10, 2021 at 12:49:36PM +0000, Richard Sandiford via Gcc-patches wrote:
> 	* internal-fn.c (commutative_binary_fn_p): Handle IFN_UBSAN_CHECK_ADD
> 	and IFN_UBSAN_CHECK_MUL.
> 
> gcc/testsuite/
> 	* gcc.dg/ubsan/commutative-1.c: New test.

Ok.

	Jakub
diff mbox series

Patch

diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c
index ff7d43f1801..b64555ada36 100644
--- a/gcc/internal-fn.c
+++ b/gcc/internal-fn.c
@@ -3830,6 +3830,8 @@  commutative_binary_fn_p (internal_fn fn)
     case IFN_FMIN:
     case IFN_FMAX:
     case IFN_COMPLEX_MUL:
+    case IFN_UBSAN_CHECK_ADD:
+    case IFN_UBSAN_CHECK_MUL:
       return true;
 
     default:
diff --git a/gcc/testsuite/gcc.dg/ubsan/commutative-1.c b/gcc/testsuite/gcc.dg/ubsan/commutative-1.c
new file mode 100644
index 00000000000..128f5b14697
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ubsan/commutative-1.c
@@ -0,0 +1,30 @@ 
+/* { dg-do compile } */
+/* { dg-options "-fsanitize=undefined -fdump-tree-optimized" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" "-flto" } { "" } } */
+
+int res[2];
+
+void
+f1 (int x, int y)
+{
+  res[0] = x + y;
+  res[1] = y + x;
+}
+
+void
+f2 (int x, int y)
+{
+  res[0] = x - y;
+  res[1] = y - x;
+}
+
+void
+f3 (int x, int y)
+{
+  res[0] = x * y;
+  res[1] = y * x;
+}
+
+/* { dg-final { scan-tree-dump-times {\.UBSAN_CHECK_ADD} 1 "optimized" } } */
+/* { dg-final { scan-tree-dump-times {\.UBSAN_CHECK_SUB} 2 "optimized" } } */
+/* { dg-final { scan-tree-dump-times {\.UBSAN_CHECK_MUL} 1 "optimized" } } */