From 45d88e3ef5f895b2fde77e3588f84d66e67bdd88 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Mon, 2 Oct 2017 11:12:50 -0700
Subject: fix optimize-instructions handling of shifts by a zero or of a zero
 when combining added constants (#1206)

---
 test/passes/optimize-instructions.txt  | 22 ++++++++++++++++++++++
 test/passes/optimize-instructions.wast | 28 ++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

(limited to 'test')

diff --git a/test/passes/optimize-instructions.txt b/test/passes/optimize-instructions.txt
index aae0724a0..68599ceb7 100644
--- a/test/passes/optimize-instructions.txt
+++ b/test/passes/optimize-instructions.txt
@@ -2157,4 +2157,26 @@
    (i64.const 255)
   )
  )
+ (func $optimizeAddedConstants-filters-through-nonzero (type $2) (result i32)
+  (i32.add
+   (i32.shl
+    (i32.const -536870912)
+    (i32.wrap/i64
+     (i64.const 0)
+    )
+   )
+   (i32.const -31744)
+  )
+ )
+ (func $optimizeAddedConstants-filters-through-nonzero-b (type $2) (result i32)
+  (i32.add
+   (i32.shl
+    (i32.const -536870912)
+    (i32.wrap/i64
+     (i64.const -1)
+    )
+   )
+   (i32.const -31744)
+  )
+ )
 )
diff --git a/test/passes/optimize-instructions.wast b/test/passes/optimize-instructions.wast
index f84be8330..a4478b755 100644
--- a/test/passes/optimize-instructions.wast
+++ b/test/passes/optimize-instructions.wast
@@ -2587,4 +2587,32 @@
       (i64.const 255)
     )
   )
+  (func $optimizeAddedConstants-filters-through-nonzero (result i32)
+   (i32.sub
+    (i32.add
+     (i32.shl
+      (i32.const -536870912)
+      (i32.wrap/i64
+       (i64.const 0)
+      )
+     )
+     (i32.const -32768)
+    )
+    (i32.const -1024)
+   )
+  )
+  (func $optimizeAddedConstants-filters-through-nonzero-b (result i32)
+   (i32.sub
+    (i32.add
+     (i32.shl
+      (i32.const -536870912)
+      (i32.wrap/i64
+       (i64.const -1)
+      )
+     )
+     (i32.const -32768)
+    )
+    (i32.const -1024)
+   )
+  )
 )
-- 
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