[clang] [lld] [llvm] [LLVM][WebAssembly] Implement branch hinting proposal (PR #146230)

[Alexis Engelke via llvm-commits]

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@@ -55,6 +55,15 @@ using namespace llvm;
 #define DEBUG_TYPE "asm-printer"
 
 extern cl::opt<bool> WasmKeepRegisters;
+// values are divided by 1<<31 to calculate the probability
+static cl::opt<uint32_t> WasmHighBranchProb(
+    "wasm-branch-prob-high", cl::Hidden,
+    cl::desc("lowest branch probability to not be annotated as likely taken"),
+    cl::init(0x40000000));
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aengelke wrote:

Use floats here? Seems not very intuitive to use the internal integer representation here. Description should also indicate value range.

https://github.com/llvm/llvm-project/pull/146230