Support for IRStringLit (#645)

* * Added support for strings in IR with IRStringLit - with storage of chars after it
* Added kIRDecorationOp_Transitory - can be used for detecting instructions constructed on stack
* Made IRConstant hashing work off type

* Fix comment that is out of date about how an instruction is determines to hold a transitory string.

2 files changed, 29 insertions, 0 deletions

diff --git a/tests/ir/string-literal.slang b/tests/ir/string-literal.slang
new file mode 100644
index 000000000..e0c893014
--- /dev/null
+++ b/tests/ir/string-literal.slang
@@ -0,0 +1,9 @@
+//TEST(compute):SIMPLE:-dump-ir -profile cs_5_0 -entry main
+
+[numthreads(1, 1, 1)]
+void main(
+    uint tid   : SV_DispatchThreadIndex)
+{
+	"Hello \t\n\0x083 World";
+}
+
diff --git a/tests/ir/string-literal.slang.expected b/tests/ir/string-literal.slang.expected
new file mode 100644
index 000000000..8df3ff00e
--- /dev/null
+++ b/tests/ir/string-literal.slang.expected
@@ -0,0 +1,20 @@
+result code = 0
+standard error = {
+let  %1	: _	= UInt()
+let  %2	: _	= Void()
+let  %3	: _	= Func(%2, %1)
+let  %4	: _	= BasicBlock()
+Ptr(%1)
+let  %5	: _	= String()
+let  %6	: %5	= string_constant("Hello \t\n\0x083 World")
+
+func @_S04mainp1puV	: %3
+{
+block %7(
+		param %8	: %1):
+	return_void()
+}
+
+}
+standard output = {
+}