PR rtl-optimization/54300

gcc/

	PR rtl-optimization/54300
	* regcprop.c (copyprop_hardreg_forward_1): Ensure any unused
	outputs in a single-set are killed from the value chains.

gcc/testsuite:

	PR rtl-optimization/54300
	* gcc.target/arm/pr54300.C: New test.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@205117 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 61 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/arm/pr54300.C b/gcc/testsuite/gcc.target/arm/pr54300.C
new file mode 100644
index 00000000000..eb1a74e36cf
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arm/pr54300.C
@@ -0,0 +1,61 @@
+/* { dg-do run } */
+/* { dg-require-effective-target arm_neon } */
+/* { dg-options "-O2" } */
+/* { dg-add-options arm_neon } */
+
+#include <arm_neon.h>
+#include <stdlib.h>
+
+struct __attribute__ ((aligned(8))) _v16u8_ {
+  uint8x16_t val;
+  _v16u8_( const int16x8_t &src) { val = vreinterpretq_u8_s16(src); }
+  operator int16x8_t () const { return vreinterpretq_s16_u8(val); }
+};
+typedef struct _v16u8_ v16u8;
+
+struct __attribute__ ((aligned(4))) _v8u8_ {
+  uint8x8_t val;
+  _v8u8_( const uint8x8_t &src) { val = src; }
+  operator int16x4_t () const { return vreinterpret_s16_u8(val); }
+};
+typedef struct _v8u8_ v8u8;
+
+typedef v16u8                v8i16;
+typedef int32x4_t            v4i32;
+typedef const short         cv1i16;
+typedef const unsigned char cv1u8;
+typedef const v8i16         cv8i16;
+
+static inline __attribute__((always_inline)) v8u8 zero_64(){ return vdup_n_u8( 0 ); }
+
+static inline __attribute__((always_inline)) v8i16 loadlo_8i16( cv8i16* p ){
+  return vcombine_s16( vld1_s16( (cv1i16 *)p ), zero_64() );
+}
+static inline __attribute__((always_inline)) v8i16 _loadlo_8i16( cv8i16* p, int offset ){
+  return loadlo_8i16( (cv8i16*)(&((cv1u8*)p)[offset]) );
+}
+
+void __attribute__((noinline))
+test(unsigned short *_Inp, int32_t *_Out,
+     unsigned int s1v, unsigned int dv0,
+     unsigned int smask_v)
+{
+  int32x4_t c = vdupq_n_s32(0);
+
+  for(unsigned int sv=0 ; sv!=dv0 ; sv=(sv+s1v)&smask_v )
+    {
+      int32x4_t s;
+      s = vmovl_s16( vget_low_s16( _loadlo_8i16( (cv8i16*) _Inp, sv ) ) );
+      c = vaddq_s32( c, s );
+    }
+  vst1q_s32( _Out, c );
+}
+
+main()
+{
+  unsigned short a[4] = {1, 2, 3, 4};
+  int32_t b[4] = {0, 0, 0, 0};
+  test(a, b, 1, 1, ~0);
+  if (b[0] != 1 || b[1] != 2 || b[2] != 3 || b[3] != 4)
+    abort();
+}