Rename "Stackmap" to "StackMap"

And "stackmap" to "stack_map".

This commit is purely mechanical.

cranelift/codegen/src/regalloc/context.rs

@@ -14,7 +14,7 @@ use crate::regalloc::coloring::Coloring;
 use crate::regalloc::live_value_tracker::LiveValueTracker;
 use crate::regalloc::liveness::Liveness;
 use crate::regalloc::reload::Reload;
-use crate::regalloc::safepoint::emit_stackmaps;
+use crate::regalloc::safepoint::emit_stack_maps;
 use crate::regalloc::spilling::Spilling;
 use crate::regalloc::virtregs::VirtRegs;
 use crate::result::CodegenResult;
@@ -206,7 +206,7 @@ impl Context {
         // This function runs after register allocation has taken
         // place, meaning values have locations assigned already.
         if isa.flags().enable_safepoints() {
-            emit_stackmaps(func, domtree, &self.liveness, &mut self.tracker, isa);
+            emit_stack_maps(func, domtree, &self.liveness, &mut self.tracker, isa);
         } else {
             // Make sure no references are used.
             for val in func.dfg.values() {

cranelift/codegen/src/regalloc/mod.rs

@@ -23,4 +23,4 @@ mod spilling;
 pub use self::context::Context;
 pub use self::diversion::{EntryRegDiversions, RegDiversions};
 pub use self::register_set::RegisterSet;
-pub use self::safepoint::emit_stackmaps;
+pub use self::safepoint::emit_stack_maps;

cranelift/codegen/src/regalloc/safepoint.rs

@@ -32,9 +32,9 @@ fn insert_and_encode_safepoint<'f>(
     }
 }
 
-// The emit_stackmaps() function analyzes each instruction to retrieve the liveness of
+// The emit_stack_maps() function analyzes each instruction to retrieve the liveness of
 // the defs and operands by traversing a function's blocks in layout order.
-pub fn emit_stackmaps(
+pub fn emit_stack_maps(
     func: &mut Function,
     domtree: &DominatorTree,
     liveness: &Liveness,