From: Uros Bizjak <ubizjak@gmail.com>
Date: Thu, 21 Dec 2023 12:50:26 +0000 (+0100)
Subject: i386: Fix shifts with high register input operand [PR113044]
X-Git-Tag: basepoints/gcc-15~3352
X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fgcc.git;a=commitdiff_plain;h=2766b83759a02572b7b303aae3d4b54a351f8f96

i386: Fix shifts with high register input operand [PR113044]

The move to the output operand should use high register input operand.

	PR target/113044

gcc/ChangeLog:

	* config/i386/i386.md (*ashlqi_ext<mode>_1): Move from the
	high register of the input operand.
	(*<insn>qi_ext<mode>_1): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr113044.c: New test.
---

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 710068e90933..4c6368bf3b72 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -15527,7 +15527,8 @@
    && !(rtx_equal_p (operands[0], operands[1]))"
   [(set (zero_extract:SWI248
 	  (match_dup 0) (const_int 8) (const_int 8))
-	(match_dup 1))
+	(zero_extract:SWI248
+	  (match_dup 1) (const_int 8) (const_int 8)))
    (parallel
      [(set (zero_extract:SWI248
 	     (match_dup 0) (const_int 8) (const_int 8))
@@ -16689,7 +16690,8 @@
    && !(rtx_equal_p (operands[0], operands[1]))"
   [(set (zero_extract:SWI248
 	  (match_dup 0) (const_int 8) (const_int 8))
-	(match_dup 1))
+	(zero_extract:SWI248
+	  (match_dup 1) (const_int 8) (const_int 8)))
    (parallel
      [(set (zero_extract:SWI248
 	     (match_dup 0) (const_int 8) (const_int 8))
diff --git a/gcc/testsuite/gcc.target/i386/pr113044.c b/gcc/testsuite/gcc.target/i386/pr113044.c
new file mode 100644
index 000000000000..923e7f48299d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr113044.c
@@ -0,0 +1,24 @@
+/* PR target/113044 */
+/* { dg-do run } */
+/* { dg-options "-O" } */
+
+typedef unsigned char __attribute__((__vector_size__ (2))) V;
+
+V
+foo (char c, V v)
+{
+  V x = v >> (v & 8);
+  volatile char d = c;
+  if (!d)
+    __builtin_abort();
+  return x;
+}
+
+int
+main (void)
+{
+  V x = foo (10, (V){3});
+  if (x[0] != 3 || x[1])
+    __builtin_abort();
+  return 0;
+}