[v5,14/14] add support for wider type in switch-case

Commit Message

Luc Van Oostenryck March 24, 2017, 11:14 p.m. UTC

Currently the different cases of a switch-statement, or more
exactly the 'struct multijmp' that hold the value of these cases
excepted only value of 'int' type. Trying to use a wider value
results in the value being truncated but any integer value should
be valid.

Fix this by unsigned 'long long' to hold these values.

Signed-off-by: Luc Van Oostenryck <[e-mail]>
---
 linearize.c              |  8 ++++----
 linearize.h              |  2 +-
 validation/switch-long.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 52 insertions(+), 5 deletions(-)
 create mode 100644 validation/switch-long.c

Patch

diff --git a/linearize.c b/linearize.c
index 73599798f..7bef5a251 100644
--- a/linearize.c
+++ b/linearize.c
@@ -77,7 +77,7 @@  static struct basic_block *alloc_basic_block(struct entrypoint *ep, struct posit
 	return bb;
 }
 
-static struct multijmp *alloc_multijmp(struct basic_block *target, int begin, int end)
+static struct multijmp *alloc_multijmp(struct basic_block *target, long long begin, long long end)
 {
 	struct multijmp *multijmp = __alloc_multijmp(0);
 	multijmp->target = target;
@@ -366,9 +366,9 @@  const char *show_instruction(struct instruction *insn)
 		buf += sprintf(buf, "%s", show_pseudo(insn->cond));
 		FOR_EACH_PTR(insn->multijmp_list, jmp) {
 			if (jmp->begin == jmp->end)
-				buf += sprintf(buf, ", %d -> .L%u", jmp->begin, jmp->target->nr);
+				buf += sprintf(buf, ", %lld -> .L%u", jmp->begin, jmp->target->nr);
 			else if (jmp->begin < jmp->end)
-				buf += sprintf(buf, ", %d ... %d -> .L%u", jmp->begin, jmp->end, jmp->target->nr);
+				buf += sprintf(buf, ", %lld ... %lld -> .L%u", jmp->begin, jmp->end, jmp->target->nr);
 			else
 				buf += sprintf(buf, ", default -> .L%u", jmp->target->nr);
 		} END_FOR_EACH_PTR(jmp);
@@ -1938,7 +1938,7 @@  static pseudo_t linearize_switch(struct entrypoint *ep, struct statement *stmt)
 			default_case = bb_case;
 			continue;
 		} else {
-			int begin, end;
+			long long begin, end;
 
 			begin = end = case_stmt->case_expression->value;
 			if (case_stmt->case_to)
diff --git a/linearize.h b/linearize.h
index d437e268d..f0e76c098 100644
--- a/linearize.h
+++ b/linearize.h
@@ -47,7 +47,7 @@  extern struct pseudo void_pseudo;
 
 struct multijmp {
 	struct basic_block *target;
-	int begin, end;
+	long long begin, end;
 };
 
 struct asm_constraint {
diff --git a/validation/switch-long.c b/validation/switch-long.c
new file mode 100644
index 000000000..5bfdb4397
--- /dev/null
+++ b/validation/switch-long.c
@@ -0,0 +1,47 @@ 
+void def(void);
+void r0(void);
+void r1(void);
+
+void sw_long(long long a)
+{
+	switch (a) {
+	case 0: return r0();
+	case 1LL << 00: return r1();
+	case 1LL << 32: return r1();
+	}
+
+	return def();
+}
+
+/*
+ * check-name: switch-long
+ * check-command: test-linearize -Wno-decl $file
+ *
+ * check-output-start
+sw_long:
+.L0:
+	<entry-point>
+	switch.64   %arg1, 0 -> .L2, 1 -> .L3, 4294967296 -> .L4, default -> .L1
+
+.L2:
+	call        r0
+	br          .L5
+
+.L3:
+	call        r1
+	br          .L5
+
+.L4:
+	call        r1
+	br          .L5
+
+.L1:
+	call        def
+	br          .L5
+
+.L5:
+	ret
+
+
+ * check-output-end
+ */