From 5db6d62e83623808fc29f6a6da636ddf5c658110 Mon Sep 17 00:00:00 2001
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Date: Tue, 5 Jan 2021 23:31:10 +0100
Subject: cmps: add testcases for simplification of signed compares

Signed compares miss some simplifications/canonicalizations.
Add some testcases for them.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 validation/optim/canonical-abs.c         | 12 ++++++++++++
 validation/optim/canonical-cmpe-minmax.c | 17 +++++++++++++++++
 validation/optim/canonical-cmps-minmax.c | 17 +++++++++++++++++
 validation/optim/canonical-cmps-sel.c    | 26 ++++++++++++++++++++++++++
 validation/optim/canonical-cmps.c        | 17 +++++++++++++++++
 validation/optim/cmps-minmax.c           | 17 +++++++++++++++++
 6 files changed, 106 insertions(+)
 create mode 100644 validation/optim/canonical-abs.c
 create mode 100644 validation/optim/canonical-cmpe-minmax.c
 create mode 100644 validation/optim/canonical-cmps-minmax.c
 create mode 100644 validation/optim/canonical-cmps-sel.c
 create mode 100644 validation/optim/canonical-cmps.c
 create mode 100644 validation/optim/cmps-minmax.c

diff --git a/validation/optim/canonical-abs.c b/validation/optim/canonical-abs.c
new file mode 100644
index 00000000..0809a52d
--- /dev/null
+++ b/validation/optim/canonical-abs.c
@@ -0,0 +1,12 @@
+_Bool abs0(int a) { return (a < 0 ? -a : a) == (a >= 0 ? a : -a); }
+_Bool abs1(int a) { return (a < 0 ? -a : a) == (a >  0 ? a : -a); }
+_Bool abs2(int a) { return (a < 0 ? -a : a) == (a <= 0 ? -a : a); }
+
+/*
+ * check-name: canonical-abs1
+ * check-command: test-linearize -Wno-decl $file
+ * check-known-to-fail
+ *
+ * check-output-ignore
+ * check-output-returns: 1
+ */
diff --git a/validation/optim/canonical-cmpe-minmax.c b/validation/optim/canonical-cmpe-minmax.c
new file mode 100644
index 00000000..c7281924
--- /dev/null
+++ b/validation/optim/canonical-cmpe-minmax.c
@@ -0,0 +1,17 @@
+#define SMAX __INT_MAX__
+#define SMIN (-__INT_MAX__-1)
+
+int le_smax(int a) { return (a <= (SMAX - 1)) == (a != SMAX); }
+int gt_smax(int a) { return (a >  (SMAX - 1)) == (a == SMAX); }
+
+int lt_smin(int a) { return (a <  (SMIN + 1)) == (a == SMIN); }
+int ge_smin(int a) { return (a >= (SMIN + 1)) == (a != SMIN); }
+
+/*
+ * check-name: canonical-cmpe-minmax
+ * check-command: test-linearize -Wno-decl $file
+ * check-known-to-fail
+ *
+ * check-output-ignore
+ * check-output-returns: 1
+ */
diff --git a/validation/optim/canonical-cmps-minmax.c b/validation/optim/canonical-cmps-minmax.c
new file mode 100644
index 00000000..bab09282
--- /dev/null
+++ b/validation/optim/canonical-cmps-minmax.c
@@ -0,0 +1,17 @@
+#define SMAX __INT_MAX__
+#define SMIN (-__INT_MAX__-1)
+
+int lt_smax(int a) { return (a <  SMAX) == (a != SMAX); }
+int ge_smax(int a) { return (a >= SMAX) == (a == SMAX); }
+
+int le_smin(int a) { return (a <= SMIN) == (a == SMIN); }
+int gt_smin(int a) { return (a >  SMIN) == (a != SMIN); }
+
+/*
+ * check-name: canonical-cmps-minmax
+ * check-command: test-linearize -Wno-decl $file
+ * check-known-to-fail
+ *
+ * check-output-ignore
+ * check-output-returns: 1
+ */
diff --git a/validation/optim/canonical-cmps-sel.c b/validation/optim/canonical-cmps-sel.c
new file mode 100644
index 00000000..f0a0effc
--- /dev/null
+++ b/validation/optim/canonical-cmps-sel.c
@@ -0,0 +1,26 @@
+_Bool sel_lts(int a, int b, int x, int y)
+{
+	return ((a < b) ? x : y) == ((a >= b) ? y : x);
+}
+_Bool sel_les(int a, int b, int x, int y)
+{
+	return ((a <= b) ? x : y) == ((a > b) ? y : x);
+}
+
+_Bool sel_ltu(unsigned int a, unsigned int b, int x, int y)
+{
+	return ((a < b) ? x : y) == ((a >= b) ? y : x);
+}
+_Bool sel_leu(unsigned int a, unsigned int b, int x, int y)
+{
+	return ((a <= b) ? x : y) == ((a > b) ? y : x);
+}
+
+/*
+ * check-name: canonical-cmps-sel
+ * check-command: test-linearize -Wno-decl $file
+ * check-known-to-fail
+ *
+ * check-output-ignore
+ * check-output-returns: 1
+ */
diff --git a/validation/optim/canonical-cmps.c b/validation/optim/canonical-cmps.c
new file mode 100644
index 00000000..f42664b2
--- /dev/null
+++ b/validation/optim/canonical-cmps.c
@@ -0,0 +1,17 @@
+_Bool lt_p(int a) { return (a >  0) == (a >=  1); }
+_Bool ge_p(int a) { return (a <= 0) == (a <   1); }
+
+_Bool lt_m(int a) { return (a <  0) == (a <= -1); }
+_Bool ge_m(int a) { return (a >= 0) == (a >  -1); }
+
+_Bool lt_x(int a) { return (a <= 1234) == (a < 1235); }
+_Bool ge_x(int a) { return (a >= 1234) == (a > 1233); }
+
+/*
+ * check-name: canonical-cmps
+ * check-command: test-linearize -Wno-decl $file
+ * check-known-to-fail
+ *
+ * check-output-ignore
+ * check-output-returns: 1
+ */
diff --git a/validation/optim/cmps-minmax.c b/validation/optim/cmps-minmax.c
new file mode 100644
index 00000000..ded3286c
--- /dev/null
+++ b/validation/optim/cmps-minmax.c
@@ -0,0 +1,17 @@
+#define SMAX __INT_MAX__
+#define SMIN (-__INT_MAX__-1)
+
+int lt_smin(int a) { return (a <  SMIN) == 0; }
+int le_smax(int a) { return (a <= SMAX) == 1; }
+
+int ge_smin(int a) { return (a >= SMIN) == 1; }
+int gt_smax(int a) { return (a >  SMAX) == 0; }
+
+/*
+ * check-name: cmps-minmax
+ * check-command: test-linearize -Wno-decl $file
+ * check-known-to-fail
+ *
+ * check-output-ignore
+ * check-output-returns: 1
+ */
-- 
cgit 1.2.3-korg