[wasm-split] Add --print-profile option (#4771)

There are several reasons why a function may not be trained in deterministically. 
So to perform quick validation we need to inspect profile.data (another ways requires split to be performed). However as profile.data is a binary file and is not self sufficient, so we cannot currently use it to perform such validation.

Therefore to allow quick check on whether a particular function has been trained in, we need to dump profile.data in a more readable format. 

This PR, allows us to output, the list of functions to be kept (in main wasm) and those split functions (to be moved to deferred.wasm) in a readable format, to console. 

Added a new option `--print-profile` 
- input path to orig.wasm (its the original wasm file that will be used later during split)
- input path to profile.data that we need to output
optionally pass `--unescape`
to unescape the function names

Usage:
```
binaryen\build>bin\wasm-split.exe test\profile_data\MY.orig.wasm --print-profile=test\profile_data\profile.data > test\profile_data\out.log
```

note: meaning of prefixes
`+` => fn to be kept in main wasm
`-` => fn to be split and moved to deferred wasm

1 files changed, 6 insertions, 0 deletions

diff --git a/test/lit/help/wasm-split.test b/test/lit/help/wasm-split.test
index 05a7df910..2bc015027 100644
--- a/test/lit/help/wasm-split.test
+++ b/test/lit/help/wasm-split.test
@@ -22,6 +22,9 @@
 ;; CHECK-NEXT:   --merge-profiles                     Merge multiple profiles for the same
 ;; CHECK-NEXT:                                        module into a single profile.
 ;; CHECK-NEXT:
+;; CHECK-NEXT:   --print-profile                      [print-profile] Print profile contents in
+;; CHECK-NEXT:                                        a human-readable format.
+;; CHECK-NEXT:
 ;; CHECK-NEXT:   --profile                            [split] The profile to use to guide
 ;; CHECK-NEXT:                                        splitting.
 ;; CHECK-NEXT:
@@ -105,6 +108,9 @@
 ;; CHECK-NEXT:
 ;; CHECK-NEXT:   --output,-o                          [instrument, merge-profiles] Output file.
 ;; CHECK-NEXT:
+;; CHECK-NEXT:   --unescape,-u                        Un-escape function names (in
+;; CHECK-NEXT:                                        print-profile output)
+;; CHECK-NEXT:
 ;; CHECK-NEXT:   --verbose,-v                         Verbose output mode. Prints the functions
 ;; CHECK-NEXT:                                        that will be kept and split out when
 ;; CHECK-NEXT:                                        splitting a module.