Optimize out memory and table when possible (#1352)

We can remove the memory/table (itself, or an import if imported) if they are not used. This is pretty minor on a large wasm file, but when reading small wasts it's very noticeable to have an unused memory and table all the time.

1 files changed, 4 insertions, 4 deletions

diff --git a/test/emcc_hello_world.fromasm.no-opts b/test/emcc_hello_world.fromasm.no-opts
index dd84b963a..2d7a706ae 100644
--- a/test/emcc_hello_world.fromasm.no-opts
+++ b/test/emcc_hello_world.fromasm.no-opts
@@ -7,6 +7,10 @@
  (type $FUNCSIG$i (func (result i32)))
  (type $FUNCSIG$iii (func (param i32 i32) (result i32)))
  (type $FUNCSIG$vii (func (param i32 i32)))
+ (import "env" "memory" (memory $0 256 256))
+ (import "env" "table" (table 18 18 anyfunc))
+ (import "env" "memoryBase" (global $memoryBase i32))
+ (import "env" "tableBase" (global $tableBase i32))
  (import "env" "STACKTOP" (global $STACKTOP$asm2wasm$import i32))
  (import "env" "STACK_MAX" (global $STACK_MAX$asm2wasm$import i32))
  (import "env" "tempDoublePtr" (global $tempDoublePtr$asm2wasm$import i32))
@@ -33,10 +37,6 @@
  (import "env" "_sysconf" (func $_sysconf (param i32) (result i32)))
  (import "env" "___syscall146" (func $___syscall146 (param i32 i32) (result i32)))
  (import "asm2wasm" "f64-to-int" (func $f64-to-int (param f64) (result i32)))
- (import "env" "memory" (memory $0 256 256))
- (import "env" "table" (table 18 18 anyfunc))
- (import "env" "memoryBase" (global $memoryBase i32))
- (import "env" "tableBase" (global $tableBase i32))
  (global $STACKTOP (mut i32) (get_global $STACKTOP$asm2wasm$import))
  (global $STACK_MAX (mut i32) (get_global $STACK_MAX$asm2wasm$import))
  (global $tempDoublePtr (mut i32) (get_global $tempDoublePtr$asm2wasm$import))