Implement minor branch optimization in executor

[Robbepop]

No description provided.

[paritytech-cicd-pr]

BENCHMARKS

	NATIVE			WASMTIME
BENCHMARK	MASTER	PR	DIFF	MASTER	PR	DIFF	WASMTIME OVERHEAD
execute/ br_table	1.53ms	1.54ms	⚪ 0.02%	1.27ms	1.31ms	🔴 3.35%	🟢 -15%
execute/ call/host/1	36.99µs	37.08µs	⚪ 0.08%	39.52µs	39.61µs	⚪ 0.21%	🟢 7%
execute/ call/rec	166.10µs	165.27µs	⚪ -0.61%	357.11µs	351.92µs	🟢 -1.58%	🔴 113%
execute/ count_until	7.48ms	7.49ms	⚪ 0.14%	7.63ms	7.62ms	⚪ -0.12%	🟢 2%
execute/ factorial/iter	344.75µs	223.76µs	🟢 -35.23%	307.28µs	312.31µs	🔴 1.61%	🟢 40%
execute/ factorial/rec	753.73µs	689.82µs	🟢 -8.54%	1.28ms	1.28ms	⚪ 0.09%	🟡 86%
execute/ fibonacci/iter	1.36ms	1.36ms	⚪ 0.10%	1.27ms	1.27ms	⚪ 0.00%	🟢 -7%
execute/ fibonacci/rec	6.67ms	6.15ms	🟢 -7.94%	12.76ms	15.04ms	🔴 17.90%	🔴 145%
execute/ fibonacci/tail	1.57ms	1.46ms	🟢 -7.84%	3.64ms	3.69ms	🔴 1.29%	🔴 154%
execute/ fuse	8.19ms	7.90ms	🟢 -3.33%	12.57ms	12.58ms	⚪ 0.06%	🟡 59%
execute/ global/bump	1.32ms	1.32ms	⚪ 0.52%	1.60ms	1.60ms	⚪ -0.03%	🟢 21%
execute/ global/get_const	680.49µs	647.61µs	🟢 -4.57%	743.65µs	743.96µs	⚪ 0.01%	🟢 15%
execute/ is_even/rec	1.07ms	1.07ms	⚪ -0.44%	2.22ms	2.22ms	⚪ -0.22%	🔴 108%
execute/ memory/fill_bytes	1.14ms	1.14ms	⚪ 0.17%	1.23ms	1.23ms	⚪ -0.18%	🟢 7%
execute/ memory/sum_bytes	1.07ms	1.07ms	⚪ 0.47%	1.23ms	1.23ms	⚪ -0.04%	🟢 15%
execute/ memory/vec_add	2.95ms	2.95ms	⚪ 0.09%	3.56ms	3.56ms	⚪ -0.03%	🟢 21%
execute/ recursive_scan	185.66µs	185.51µs	⚪ -0.44%	377.11µs	371.66µs	🟢 -1.47%	🟡 100%
execute/ recursive_trap	15.36µs	15.23µs	⚪ -1.11%	35.92µs	34.53µs	🟢 -3.81%	🔴 127%
execute/ regex_redux	595.17µs	591.98µs	⚪ -0.43%	1.04ms	1.03ms	⚪ -0.85%	🟡 75%
execute/ rev_complement	445.45µs	442.25µs	⚪ -0.95%	632.93µs	633.06µs	⚪ 0.00%	🟢 43%
execute/ tiny_keccak	351.75µs	350.38µs	⚪ -0.48%	388.82µs	382.39µs	🟢 -1.50%	🟢 9%
execute/ trunc_f2i	623.19µs	619.01µs	⚪ -0.63%	949.12µs	948.99µs	⚪ 0.00%	🟡 53%
instantiate/ wasm_kernel	56.80µs	57.84µs	⚪ 0.48%	55.95µs	57.51µs	🔴 2.66%	🟢 -1%
overhead/ call/typed/0	1.23ms	1.25ms	⚪ 1.63%	850.86µs	863.21µs	🔴 1.36%	🟢 -31%
overhead/ call/typed/16	1.60ms	1.61ms	⚪ 0.51%	2.01ms	1.99ms	⚪ -0.91%	🟢 24%
overhead/ call/untyped/0	1.66ms	1.65ms	⚪ 0.03%	1.29ms	1.30ms	⚪ 0.71%	🟢 -21%
overhead/ call/untyped/16	2.47ms	2.39ms	🟢 -3.65%	3.83ms	3.83ms	⚪ 0.11%	🟡 61%
translate/ bz2	1.33ms	1.33ms	⚪ -0.58%	2.44ms	2.61ms	🔴 7.08%	🟡 97%
translate/ erc1155	278.63µs	277.78µs	⚪ 0.10%	472.16µs	491.06µs	🔴 3.74%	🟡 77%
translate/ erc20	135.68µs	135.72µs	⚪ 0.10%	227.01µs	236.40µs	🔴 4.45%	🟡 74%
translate/ erc721	191.08µs	192.54µs	⚪ 0.62%	327.10µs	340.82µs	🔴 4.15%	🟡 77%
translate/ pulldown_cmark	3.74ms	3.73ms	⚪ -0.26%	6.50ms	6.73ms	🔴 3.52%	🟡 81%
translate/ spidermonkey	0.00ns	0.00ns	⚪ 0.36%	0.00ns	0.00ns	🔴 4.38%	🟢 0%
translate/ wasm_kernel	4.97ms	4.98ms	⚪ 0.17%	8.67ms	9.03ms	🔴 4.18%	🟡 81%

Link to pipeline

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (834c3fb) 80.92% compared to head (276ca42) 80.93%.

❗ Current head 276ca42 differs from pull request most recent head bab9588. Consider uploading reports for the commit bab9588 to get more accurate results

Files	Patch %	Lines
crates/wasmi/src/engine/regmach/executor/instrs.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #806   +/-   ##
=======================================
  Coverage   80.92%   80.93%           
=======================================
  Files         274      274           
  Lines       25364    25366    +2     
=======================================
+ Hits        20527    20529    +2     
  Misses       4837     4837           

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