Remove fastcomp-only FAST_UNROLLED_MEMCPY_AND_MEMSET setting (#11861)

See #11860

Author: kripken

src/library.js

@@ -991,29 +991,6 @@ LibraryManager.library = {
         num = (num-1)|0;
       }
       aligned_dest_end = (dest_end & -4)|0;
-#if FAST_UNROLLED_MEMCPY_AND_MEMSET
-      block_aligned_dest_end = (aligned_dest_end - 64)|0;
-      while ((dest|0) <= (block_aligned_dest_end|0) ) {
-        {{{ makeSetValueAsm('dest', 0, makeGetValueAsm('src', 0, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 4, makeGetValueAsm('src', 4, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 8, makeGetValueAsm('src', 8, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 12, makeGetValueAsm('src', 12, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 16, makeGetValueAsm('src', 16, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 20, makeGetValueAsm('src', 20, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 24, makeGetValueAsm('src', 24, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 28, makeGetValueAsm('src', 28, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 32, makeGetValueAsm('src', 32, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 36, makeGetValueAsm('src', 36, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 40, makeGetValueAsm('src', 40, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 44, makeGetValueAsm('src', 44, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 48, makeGetValueAsm('src', 48, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 52, makeGetValueAsm('src', 52, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 56, makeGetValueAsm('src', 56, 'i32'), 'i32') }}};
-        {{{ makeSetValueAsm('dest', 60, makeGetValueAsm('src', 60, 'i32'), 'i32') }}};
-        dest = (dest+64)|0;
-        src = (src+64)|0;
-      }
-#endif
       while ((dest|0) < (aligned_dest_end|0) ) {
         {{{ makeSetValueAsm('dest', 0, makeGetValueAsm('src', 0, 'i32'), 'i32') }}};
         dest = (dest+4)|0;
@@ -1085,30 +1062,6 @@ LibraryManager.library = {
       aligned_end = (end & -4)|0;
       value4 = value | (value << 8) | (value << 16) | (value << 24);
 
-#if FAST_UNROLLED_MEMCPY_AND_MEMSET
-      block_aligned_end = (aligned_end - 64)|0;
-
-      while((ptr|0) <= (block_aligned_end|0)) {
-        {{{ makeSetValueAsm('ptr', 0, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 4, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 8, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 12, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 16, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 20, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 24, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 28, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 32, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 36, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 40, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 44, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 48, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 52, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 56, 'value4', 'i32') }}};
-        {{{ makeSetValueAsm('ptr', 60, 'value4', 'i32') }}};
-        ptr = (ptr + 64)|0;
-      }
-#endif
-
       while ((ptr|0) < (aligned_end|0) ) {
         {{{ makeSetValueAsm('ptr', 0, 'value4', 'i32') }}};
         ptr = (ptr+4)|0;

src/settings.js

@@ -29,8 +29,8 @@
 //
 // In general it is best to pass the same arguments at both compile and link
 // time, as whether wasm object files are used or not affects when codegen
-// happens (without wasm object files, or when using fastcomp, codegen is all
-// during link; otherwise, it is during compile). Flags affecting codegen must
+// happens (without wasm object files, codegen is done entirely during
+// link; otherwise, it is during compile). Flags affecting codegen must
 // be passed when codegen happens, so to let a build easily switch when codegen
 // happens (LTO vs normal), pass the flags at both times. The flags are also
 // annotated in this file:
@@ -149,12 +149,6 @@ var MALLOC = "dlmalloc";
 // [link]
 var ABORTING_MALLOC = 1;
 
-// If 1, generated a version of memcpy() and memset() that unroll their
-// copy sizes. If 0, optimizes for size instead to generate a smaller memcpy.
-// This flag only has effect when targeting asm.js.
-// [fastcomp-only]
-var FAST_UNROLLED_MEMCPY_AND_MEMSET = 1;
-
 // The initial amount of memory to use. Using more memory than this will
 // cause us to expand the heap, which can be costly with typed arrays:
 // we need to copy the old heap into a new one in that case.

tests/test_other.py

@@ -9039,7 +9039,6 @@ def test_minimal_runtime_code_size(self):
                                '-s', 'GL_TRACK_ERRORS=0',
                                '-s', 'GL_SUPPORT_EXPLICIT_SWAP_CONTROL=0',
                                '-s', 'GL_POOL_TEMP_BUFFERS=0',
-                               '-s', 'FAST_UNROLLED_MEMCPY_AND_MEMSET=0',
                                '-s', 'MIN_CHROME_VERSION=58',
                                '-s', 'NO_FILESYSTEM=1',
                                '--output_eol', 'linux',