From 768d1fc539e425280acba5b30256e3b1267ddfbb Mon Sep 17 00:00:00 2001
From: hfcc <42674143+hcff@users.noreply.github.com>
Date: Wed, 5 Sep 2018 23:31:25 +0200
Subject: [PATCH] Added compilation error when a non-float is given to
 @floatToInt()

---
 src/ir.cpp              | 6 ++++++
 test/compile_errors.zig | 9 +++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/ir.cpp b/src/ir.cpp
index 3184561ebc..e928dc4f7b 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -18497,6 +18497,12 @@ static TypeTableEntry *ir_analyze_instruction_float_to_int(IrAnalyze *ira, IrIns
     if (type_is_invalid(target->value.type))
         return ira->codegen->builtin_types.entry_invalid;
 
+    if (target->value.type->id != TypeTableEntryIdFloat && target->value.type->id != TypeTableEntryIdComptimeFloat) {
+        ir_add_error(ira, instruction->target, buf_sprintf("expected float type, found '%s'",
+                    buf_ptr(&target->value.type->name)));
+        return ira->codegen->builtin_types.entry_invalid;
+    }
+
     IrInstruction *result = ir_resolve_cast(ira, &instruction->base, target, dest_type, CastOpFloatToInt, false);
     ir_link_new_instruction(result, &instruction->base);
     return dest_type;
diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index cbca4bb7e3..ce67f25ed7 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -495,6 +495,15 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
         ".tmp_source.zig:2:32: error: expected int type, found 'comptime_float'",
     );
 
+    cases.add(
+        "non float passed to @floatToInt",
+        \\export fn entry() void {
+        \\    const x = @floatToInt(i32, 54);
+        \\}
+    ,
+        ".tmp_source.zig:2:32: error: expected float type, found 'comptime_int'",
+    );
+
     cases.add(
         "use implicit casts to assign null to non-nullable pointer",
         \\export fn entry() void {