Skip test gcc/testsuite/gcc.dg/asm-4.c for amdgcn target

2019-12-05  Frederik Harwath  <frederik@codesourcery.com>

gcc/testsuite/
	* gcc.dg/asm-4.c: Skip on target amdgcn-*-*.

From-SVN: r278993

gcc/testsuite/ChangeLog

+2019-12-05  Frederik Harwath  <frederik@codesourcery.com>
+
+	* gcc.dg/asm-4.c: Skip on target amdgcn-*-*.
+
 2019-12-05  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/92803

gcc/testsuite/gcc.dg/asm-4.c

@@ -3,6 +3,7 @@
 
 /* "p" modifier can't be used to generate a valid memory address with ILP32.  */
 /* { dg-skip-if "" { aarch64*-*-* && ilp32 } } */
+/* { dg-skip-if "'p' is not supported for GCN" { amdgcn-*-* } } */
 
 int main()
 {