diff --git a/ConflictSet.cpp b/ConflictSet.cpp
index ece8e60..8187a9a 100644
--- a/ConflictSet.cpp
+++ b/ConflictSet.cpp
@@ -1969,6 +1969,9 @@ downLeftSpine:
   return n->entry.rangeVersion <= readVersion;
 }
 
+// Only one of these is ever exercised. I'm not worried about somehow not
+// calling one of these though.
+// GCOVR_EXCL_START
 #ifdef HAS_AVX
 uint32_t compare16_32bit(const InternalVersionT *vs, InternalVersionT rv) {
   uint32_t compared = 0;
@@ -1995,6 +1998,7 @@ compare16_32bit_avx512(const InternalVersionT *vs, InternalVersionT rv) {
       _mm512_setzero_epi32());
 }
 #endif
+// GCOVR_EXCL_STOP
 
 // Returns true if v[i] <= readVersion for all i such that begin <= is[i] < end
 // Preconditions: begin <= end, end - begin < 256
@@ -2049,9 +2053,9 @@ bool scan16(const InternalVersionT *vs, const uint8_t *is, int begin, int end,
 
   uint32_t compared = 0;
   if constexpr (kAVX512) {
-    compared = compare16_32bit_avx512(vs, readVersion);
+    compared = compare16_32bit_avx512(vs, readVersion); // GCOVR_EXCL_LINE
   } else {
-    compared = compare16_32bit(vs, readVersion);
+    compared = compare16_32bit(vs, readVersion); // GCOVR_EXCL_LINE
   }
   return !(compared & mask);
 
@@ -2077,10 +2081,11 @@ bool scan16(const InternalVersionT *vs, const uint8_t *is, int begin, int end,
 // Returns true if v[i] <= readVersion for all i such that begin <= i < end
 //
 // always_inline So that we can optimize when begin or end is a constant.
+// gcovr exclude annotation necessary because of always_inline?
 template <bool kAVX512>
 inline __attribute__((always_inline)) bool
-scan16(const InternalVersionT *vs, int begin, int end,
-       InternalVersionT readVersion) {
+scan16(const InternalVersionT *vs, int begin, int end, // GCOVR_EXCL_LINE
+       InternalVersionT readVersion) {                 // GCOVR_EXCL_LINE
   assert(0 <= begin && begin < 16);
   assert(0 <= end && end <= 16);
   assert(begin <= end);