bench: Disambiguate benchmark names in mem_icount

The latest release of gungraun uses global symbols to register tests.
Since it doesn't know about modules, these conflict.

Add the module name so this isn't an issue, but keep the modules around
because they are useful for organization.

Author: tgross35

builtins-test/benches/mem_icount.rs

@@ -108,7 +108,7 @@ mod mcpy {
         ],
         setup = setup,
     )]
-    fn bench((len, mut dst, src): (usize, AlignedSlice, AlignedSlice)) {
+    fn bench_cpy((len, mut dst, src): (usize, AlignedSlice, AlignedSlice)) {
         unsafe {
             black_box(memcpy(
                 black_box(dst.as_mut_ptr()),
@@ -118,7 +118,7 @@ mod mcpy {
         }
     }
 
-    library_benchmark_group!(name = memcpy; benchmarks = bench);
+    library_benchmark_group!(name = memcpy; benchmarks = bench_cpy);
 }
 
 mod mset {
@@ -157,7 +157,7 @@ mod mset {
         ],
         setup = setup,
     )]
-    fn bench((len, mut dst): (usize, AlignedSlice)) {
+    fn bench_set((len, mut dst): (usize, AlignedSlice)) {
         unsafe {
             black_box(memset(
                 black_box(dst.as_mut_ptr()),
@@ -167,7 +167,7 @@ mod mset {
         }
     }
 
-    library_benchmark_group!(name = memset; benchmarks = bench);
+    library_benchmark_group!(name = memset; benchmarks = bench_set);
 }
 
 mod mcmp {
@@ -225,7 +225,7 @@ mod mcmp {
         ],
         setup = setup
     )]
-    fn bench((len, mut dst, src): (usize, AlignedSlice, AlignedSlice)) {
+    fn bench_cmp((len, mut dst, src): (usize, AlignedSlice, AlignedSlice)) {
         unsafe {
             black_box(memcmp(
                 black_box(dst.as_mut_ptr()),
@@ -235,7 +235,7 @@ mod mcmp {
         }
     }
 
-    library_benchmark_group!(name = memcmp; benchmarks = bench);
+    library_benchmark_group!(name = memcmp; benchmarks = bench_cmp);
 }
 
 mod mmove {
@@ -384,7 +384,7 @@ mod mmove {
         ],
         setup = setup_forward
     )]
-    fn forward((len, spread, mut buf): (usize, usize, AlignedSlice)) {
+    fn forward_move((len, spread, mut buf): (usize, usize, AlignedSlice)) {
         // Test moving from the start of the buffer toward the end
         unsafe {
             black_box(memmove(
@@ -478,7 +478,7 @@ mod mmove {
         ],
         setup = setup_backward
     )]
-    fn backward((len, spread, mut buf): (usize, usize, AlignedSlice)) {
+    fn backward_move((len, spread, mut buf): (usize, usize, AlignedSlice)) {
         // Test moving from the end of the buffer toward the start
         unsafe {
             black_box(memmove(
@@ -489,7 +489,7 @@ mod mmove {
         }
     }
 
-    library_benchmark_group!(name = memmove; benchmarks = forward, backward);
+    library_benchmark_group!(name = memmove; benchmarks = forward_move, backward_move);
 }
 
 use mcmp::memcmp;