testsuite/s390: Add tests for noce_convert_multiple.

Add new s390-specific tests that check if we convert two SETs into two
loads on condition.  Remove the s390-specific target-check in
gcc.dg/ifcvt-4.c.

gcc/testsuite/ChangeLog:

	* gcc.dg/ifcvt-4.c: Remove s390-specific check.
	* gcc.target/s390/ifcvt-two-insns-bool.c: New test.
	* gcc.target/s390/ifcvt-two-insns-int.c: New test.
	* gcc.target/s390/ifcvt-two-insns-long.c: New test.

4 files changed, 118 insertions, 1 deletions

diff --git a/gcc/testsuite/gcc.dg/ifcvt-4.c b/gcc/testsuite/gcc.dg/ifcvt-4.c
index 0525102..37aa76a 100644
--- a/gcc/testsuite/gcc.dg/ifcvt-4.c
+++ b/gcc/testsuite/gcc.dg/ifcvt-4.c
@@ -2,7 +2,7 @@
 /* { dg-additional-options "-misel" { target { powerpc*-*-* } } } */
 /* { dg-additional-options "-march=z196" { target { s390x-*-* } } } */
 /* { dg-additional-options "-mtune-ctrl=^one_if_conv_insn" { target { i?86-*-* x86_64-*-* } } } */
-/* { dg-skip-if "Multiple set if-conversion not guaranteed on all subtargets" { "arm*-*-* avr-*-* hppa*64*-*-* s390-*-* visium-*-*" riscv*-*-* msp430-*-* nios2-*-*} }  */
+/* { dg-skip-if "Multiple set if-conversion not guaranteed on all subtargets" { "arm*-*-* avr-*-* hppa*64*-*-* visium-*-*" riscv*-*-* msp430-*-* nios2-*-*} }  */
 /* { dg-skip-if "" { "s390x-*-*" } { "-m31" } }  */
 
 typedef int word __attribute__((mode(word)));
diff --git a/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-bool.c b/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-bool.c
new file mode 100644
index 0000000..d2f18f58
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-bool.c
@@ -0,0 +1,39 @@
+/* Check if conversion for two instructions.  */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -march=z13 --save-temps" } */
+
+/* { dg-final { scan-assembler "lochinle\t%r.?,1" } } */
+/* { dg-final { scan-assembler "locrnle\t.*" } } */
+#include <stdbool.h>
+#include <limits.h>
+#include <stdio.h>
+#include <assert.h>
+
+__attribute__ ((noinline))
+int foo (int *a, unsigned int n)
+{
+  int min = 999999;
+  bool bla = false;
+  for (int i = 0; i < n; i++)
+    {
+      if (a[i] < min)
+	{
+	  min = a[i];
+	  bla = true;
+	}
+    }
+
+  if (bla)
+    min += 1;
+  return min;
+}
+
+int main()
+{
+  int a[] = {2, 1, -13, INT_MAX, INT_MIN, 0};
+
+  int res = foo (a, sizeof (a));
+
+  assert (res == (INT_MIN + 1));
+}
diff --git a/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-int.c b/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-int.c
new file mode 100644
index 0000000..1ced710
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-int.c
@@ -0,0 +1,39 @@
+/* Check if conversion for two instructions.  */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -march=z13 --save-temps" } */
+
+/* { dg-final { scan-assembler "lochinle\t%r.?,1" } } */
+/* { dg-final { scan-assembler "locrnle\t.*" } } */
+#include <stdbool.h>
+#include <limits.h>
+#include <stdio.h>
+#include <assert.h>
+
+__attribute__ ((noinline))
+int foo (int *a, unsigned int n)
+{
+  int min = 999999;
+  int bla = 0;
+  for (int i = 0; i < n; i++)
+    {
+      if (a[i] < min)
+	{
+	  min = a[i];
+	  bla = 1;
+	}
+    }
+
+  if (bla)
+    min += 1;
+  return min;
+}
+
+int main()
+{
+  int a[] = {2, 1, -13, INT_MAX, INT_MIN, 0};
+
+  int res = foo (a, sizeof (a));
+
+  assert (res == (INT_MIN + 1));
+}
diff --git a/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-long.c b/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-long.c
new file mode 100644
index 0000000..5a1173f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/ifcvt-two-insns-long.c
@@ -0,0 +1,39 @@
+/* Check if conversion for two instructions.  */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -march=z13 --save-temps" } */
+
+/* { dg-final { scan-assembler "locghinle\t%r.?,1" } } */
+/* { dg-final { scan-assembler "locgrnle\t.*" } } */
+#include <stdbool.h>
+#include <limits.h>
+#include <stdio.h>
+#include <assert.h>
+
+__attribute__ ((noinline))
+long foo (long *a, unsigned long n)
+{
+  long min = 999999;
+  long bla = 0;
+  for (int i = 0; i < n; i++)
+    {
+      if (a[i] < min)
+	{
+	  min = a[i];
+	  bla = 1;
+	}
+    }
+
+  if (bla)
+    min += 1;
+  return min;
+}
+
+int main()
+{
+  long a[] = {2, 1, -13, LONG_MAX, LONG_MIN, 0};
+
+  long res = foo (a, sizeof (a));
+
+  assert (res == (LONG_MIN + 1));
+}