Fix parsing of literals in stdlib. (#3610)

* Fix parsing of literals in stdlib.

* Fix double lit limits.

5 files changed, 25 insertions, 11 deletions

diff --git a/source/slang/core.meta.slang b/source/slang/core.meta.slang
index 1e1ef061e..b02a44c5c 100644
--- a/source/slang/core.meta.slang
+++ b/source/slang/core.meta.slang
@@ -997,8 +997,8 @@ extension float : IRangedValue
 
 extension double : IRangedValue
 {
-    static const double maxValue = 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.0;
-    static const double minValue = -179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.0;
+    static const double maxValue = bit_cast<double>(0x7fefffffffffffffULL);
+    static const double minValue = bit_cast<double>(0xffefffffffffffffULL);
 }
 
 extension int : IRangedValue
diff --git a/source/slang/slang-ast-expr.h b/source/slang/slang-ast-expr.h
index 9f2cd22a9..9a7993937 100644
--- a/source/slang/slang-ast-expr.h
+++ b/source/slang/slang-ast-expr.h
@@ -79,6 +79,7 @@ class LiteralExpr : public Expr
     // The token that was used to express the literal. This can be
     // used to get the raw text of the literal, including any suffix.
     Token token;
+    BaseType suffixType = BaseType::Void;
 };
 
 class IntegerLiteralExpr : public LiteralExpr
diff --git a/source/slang/slang-check-expr.cpp b/source/slang/slang-check-expr.cpp
index e9de74d8e..811e4b395 100644
--- a/source/slang/slang-check-expr.cpp
+++ b/source/slang/slang-check-expr.cpp
@@ -1384,7 +1384,7 @@ namespace Slang
         //
         if(!expr->type.type)
         {
-            expr->type = m_astBuilder->getIntType();
+            expr->type = m_astBuilder->getBuiltinType(expr->suffixType);
         }
         return expr;
     }
@@ -1393,7 +1393,7 @@ namespace Slang
     {
         if(!expr->type.type)
         {
-            expr->type = m_astBuilder->getFloatType();
+            expr->type = m_astBuilder->getBuiltinType(expr->suffixType);
         }
         return expr;
     }
diff --git a/source/slang/slang-parser.cpp b/source/slang/slang-parser.cpp
index ad4e65bf2..f2aff32ea 100644
--- a/source/slang/slang-parser.cpp
+++ b/source/slang/slang-parser.cpp
@@ -6590,11 +6590,9 @@ namespace Slang
 
                 value = _fixIntegerLiteral(suffixBaseType, value, &token, parser->sink);
 
-                ASTBuilder* astBuilder = parser->astBuilder;
-                Type* suffixType = (suffixBaseType == BaseType::Void) ? astBuilder->getErrorType() : astBuilder->getBuiltinType(suffixBaseType);
 
                 constExpr->value = value;
-                constExpr->type = QualType(suffixType);
+                constExpr->suffixType = suffixBaseType;
 
                 return constExpr;
             }
@@ -6704,12 +6702,9 @@ namespace Slang
                     }
                 }
 
-                ASTBuilder* astBuilder = parser->astBuilder;
-
-                Type* suffixType = (suffixBaseType == BaseType::Void) ? astBuilder->getErrorType() : astBuilder->getBuiltinType(suffixBaseType);
 
                 constExpr->value = fixedValue;
-                constExpr->type = QualType(suffixType);
+                constExpr->suffixType = suffixBaseType;
 
                 return constExpr;
             }
diff --git a/tests/bugs/gh-3589.slang b/tests/bugs/gh-3589.slang
new file mode 100644
index 000000000..58bb74f37
--- /dev/null
+++ b/tests/bugs/gh-3589.slang
@@ -0,0 +1,18 @@
+//TEST:SIMPLE(filecheck=CHECK): -target hlsl -entry main -profile cs_6_0
+RWStructuredBuffer<int64_t> outputBuffer;
+RWStructuredBuffer<double> outputBuffer2;
+
+void main(uint id: SV_DispatchThreadID)
+{
+    let i = int64_t.maxValue;
+    let m = int64_t.minValue;
+    // CHECK: 9223372036854775807LL
+    // CHECK: -9223372036854775808LL
+    outputBuffer[0] = i;
+    outputBuffer[1] = m;
+
+    // CHECK: -179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.0
+    outputBuffer2[0] = double.minValue;
+    // CHECK: 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.0
+    outputBuffer2[1] = double.maxValue;
+}
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