diff --git a/compiler/rustc_mir_build/src/build/coverageinfo.rs b/compiler/rustc_mir_build/src/build/coverageinfo.rs
index ee9eeb62990d2..855dcbbcb346e 100644
--- a/compiler/rustc_mir_build/src/build/coverageinfo.rs
+++ b/compiler/rustc_mir_build/src/build/coverageinfo.rs
@@ -157,6 +157,63 @@ impl BranchInfoBuilder {
 }
 
 impl<'tcx> Builder<'_, 'tcx> {
+    /// If condition coverage is enabled, inject extra blocks and marker statements
+    /// that will let us track the value of the condition in `place`.
+    pub(crate) fn visit_coverage_standalone_condition(
+        &mut self,
+        mut expr_id: ExprId,     // Expression giving the span of the condition
+        place: mir::Place<'tcx>, // Already holds the boolean condition value
+        block: &mut BasicBlock,
+    ) {
+        // Bail out if condition coverage is not enabled for this function.
+        let Some(branch_info) = self.coverage_branch_info.as_mut() else { return };
+        if !self.tcx.sess.instrument_coverage_condition() {
+            return;
+        };
+
+        // Remove any wrappers, so that we can inspect the real underlying expression.
+        while let ExprKind::Use { source: inner } | ExprKind::Scope { value: inner, .. } =
+            self.thir[expr_id].kind
+        {
+            expr_id = inner;
+        }
+        // If the expression is a lazy logical op, it will naturally get branch
+        // coverage as part of its normal lowering, so we can disregard it here.
+        if let ExprKind::LogicalOp { .. } = self.thir[expr_id].kind {
+            return;
+        }
+
+        let source_info = SourceInfo { span: self.thir[expr_id].span, scope: self.source_scope };
+
+        // Using the boolean value that has already been stored in `place`, set up
+        // control flow in the shape of a diamond, so that we can place separate
+        // marker statements in the true and false blocks. The coverage MIR pass
+        // will use those markers to inject coverage counters as appropriate.
+        //
+        //          block
+        //         /     \
+        // true_block   false_block
+        //  (marker)     (marker)
+        //         \     /
+        //        join_block
+
+        let true_block = self.cfg.start_new_block();
+        let false_block = self.cfg.start_new_block();
+        self.cfg.terminate(
+            *block,
+            source_info,
+            mir::TerminatorKind::if_(mir::Operand::Copy(place), true_block, false_block),
+        );
+
+        branch_info.add_two_way_branch(&mut self.cfg, source_info, true_block, false_block);
+
+        let join_block = self.cfg.start_new_block();
+        self.cfg.goto(true_block, source_info, join_block);
+        self.cfg.goto(false_block, source_info, join_block);
+        // Any subsequent codegen in the caller should use the new join block.
+        *block = join_block;
+    }
+
     /// If branch coverage is enabled, inject marker statements into `then_block`
     /// and `else_block`, and record their IDs in the table of branch spans.
     pub(crate) fn visit_coverage_branch_condition(
diff --git a/compiler/rustc_mir_build/src/build/expr/into.rs b/compiler/rustc_mir_build/src/build/expr/into.rs
index 9349133d2dbc1..c08a3b6691afc 100644
--- a/compiler/rustc_mir_build/src/build/expr/into.rs
+++ b/compiler/rustc_mir_build/src/build/expr/into.rs
@@ -183,9 +183,13 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                         const_: Const::from_bool(this.tcx, constant),
                     },
                 );
-                let rhs = unpack!(this.expr_into_dest(destination, continuation, rhs));
+                let mut rhs_block = unpack!(this.expr_into_dest(destination, continuation, rhs));
+                // Instrument the lowered RHS's value for condition coverage.
+                // (Does nothing if condition coverage is not enabled.)
+                this.visit_coverage_standalone_condition(rhs, destination, &mut rhs_block);
+
                 let target = this.cfg.start_new_block();
-                this.cfg.goto(rhs, source_info, target);
+                this.cfg.goto(rhs_block, source_info, target);
                 this.cfg.goto(short_circuit, source_info, target);
                 target.unit()
             }
diff --git a/tests/coverage/branch/conditions.cov-map b/tests/coverage/branch/conditions.cov-map
index e2f6fb264ccab..be1e816de07d3 100644
--- a/tests/coverage/branch/conditions.cov-map
+++ b/tests/coverage/branch/conditions.cov-map
@@ -1,11 +1,11 @@
 Function name: conditions::assign_3
-Raw bytes (73): 0x[01, 01, 09, 07, 0b, 05, 09, 0d, 11, 01, 05, 01, 05, 22, 11, 01, 05, 22, 11, 01, 05, 09, 01, 17, 01, 00, 28, 03, 01, 09, 00, 0a, 01, 00, 0d, 00, 0e, 20, 05, 22, 00, 0d, 00, 0e, 22, 00, 12, 00, 13, 20, 1e, 11, 00, 12, 00, 13, 1e, 00, 17, 00, 18, 20, 09, 0d, 00, 17, 00, 18, 03, 01, 05, 01, 02]
+Raw bytes (73): 0x[01, 01, 09, 05, 07, 0b, 11, 09, 0d, 01, 05, 01, 05, 22, 11, 01, 05, 22, 11, 01, 05, 09, 01, 17, 01, 00, 28, 03, 01, 09, 00, 0a, 01, 00, 0d, 00, 0e, 20, 05, 22, 00, 0d, 00, 0e, 22, 00, 12, 00, 13, 20, 1e, 11, 00, 12, 00, 13, 1e, 00, 17, 00, 18, 20, 09, 0d, 00, 17, 00, 18, 03, 01, 05, 01, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 9
-- expression 0 operands: lhs = Expression(1, Add), rhs = Expression(2, Add)
-- expression 1 operands: lhs = Counter(1), rhs = Counter(2)
-- expression 2 operands: lhs = Counter(3), rhs = Counter(4)
+- expression 0 operands: lhs = Counter(1), rhs = Expression(1, Add)
+- expression 1 operands: lhs = Expression(2, Add), rhs = Counter(4)
+- expression 2 operands: lhs = Counter(2), rhs = Counter(3)
 - expression 3 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 4 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 5 operands: lhs = Expression(8, Sub), rhs = Counter(4)
@@ -15,7 +15,7 @@ Number of expressions: 9
 Number of file 0 mappings: 9
 - Code(Counter(0)) at (prev + 23, 1) to (start + 0, 40)
 - Code(Expression(0, Add)) at (prev + 1, 9) to (start + 0, 10)
-    = ((c1 + c2) + (c3 + c4))
+    = (c1 + ((c2 + c3) + c4))
 - Code(Counter(0)) at (prev + 0, 13) to (start + 0, 14)
 - Branch { true: Counter(1), false: Expression(8, Sub) } at (prev + 0, 13) to (start + 0, 14)
     true  = c1
@@ -31,7 +31,7 @@ Number of file 0 mappings: 9
     true  = c2
     false = c3
 - Code(Expression(0, Add)) at (prev + 1, 5) to (start + 1, 2)
-    = ((c1 + c2) + (c3 + c4))
+    = (c1 + ((c2 + c3) + c4))
 
 Function name: conditions::assign_3_bis
 Raw bytes (69): 0x[01, 01, 07, 07, 11, 09, 0d, 01, 05, 05, 09, 16, 1a, 05, 09, 01, 05, 09, 01, 1c, 01, 00, 2c, 03, 01, 09, 00, 0a, 01, 00, 0d, 00, 0e, 20, 05, 1a, 00, 0d, 00, 0e, 05, 00, 12, 00, 13, 20, 09, 16, 00, 12, 00, 13, 13, 00, 17, 00, 18, 20, 0d, 11, 00, 17, 00, 18, 03, 01, 05, 01, 02]
@@ -66,18 +66,18 @@ Number of file 0 mappings: 9
     = ((c2 + c3) + c4)
 
 Function name: conditions::assign_and
-Raw bytes (51): 0x[01, 01, 04, 09, 07, 0d, 0e, 01, 05, 01, 05, 07, 01, 0d, 01, 00, 21, 03, 01, 09, 00, 0a, 01, 00, 0d, 00, 0e, 20, 05, 0e, 00, 0d, 00, 0e, 05, 00, 12, 00, 13, 20, 09, 0d, 00, 12, 00, 13, 03, 01, 05, 01, 02]
+Raw bytes (51): 0x[01, 01, 04, 07, 0e, 09, 0d, 01, 05, 01, 05, 07, 01, 0d, 01, 00, 21, 03, 01, 09, 00, 0a, 01, 00, 0d, 00, 0e, 20, 05, 0e, 00, 0d, 00, 0e, 05, 00, 12, 00, 13, 20, 09, 0d, 00, 12, 00, 13, 03, 01, 05, 01, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 4
-- expression 0 operands: lhs = Counter(2), rhs = Expression(1, Add)
-- expression 1 operands: lhs = Counter(3), rhs = Expression(3, Sub)
+- expression 0 operands: lhs = Expression(1, Add), rhs = Expression(3, Sub)
+- expression 1 operands: lhs = Counter(2), rhs = Counter(3)
 - expression 2 operands: lhs = Counter(0), rhs = Counter(1)
 - expression 3 operands: lhs = Counter(0), rhs = Counter(1)
 Number of file 0 mappings: 7
 - Code(Counter(0)) at (prev + 13, 1) to (start + 0, 33)
 - Code(Expression(0, Add)) at (prev + 1, 9) to (start + 0, 10)
-    = (c2 + (c3 + (c0 - c1)))
+    = ((c2 + c3) + (c0 - c1))
 - Code(Counter(0)) at (prev + 0, 13) to (start + 0, 14)
 - Branch { true: Counter(1), false: Expression(3, Sub) } at (prev + 0, 13) to (start + 0, 14)
     true  = c1
@@ -87,7 +87,7 @@ Number of file 0 mappings: 7
     true  = c2
     false = c3
 - Code(Expression(0, Add)) at (prev + 1, 5) to (start + 1, 2)
-    = (c2 + (c3 + (c0 - c1)))
+    = ((c2 + c3) + (c0 - c1))
 
 Function name: conditions::assign_or
 Raw bytes (51): 0x[01, 01, 04, 07, 0d, 05, 09, 01, 05, 01, 05, 07, 01, 12, 01, 00, 20, 03, 01, 09, 00, 0a, 01, 00, 0d, 00, 0e, 20, 05, 0e, 00, 0d, 00, 0e, 0e, 00, 12, 00, 13, 20, 09, 0d, 00, 12, 00, 13, 03, 01, 05, 01, 02]
@@ -123,13 +123,13 @@ Number of file 0 mappings: 1
 - Code(Counter(0)) at (prev + 33, 1) to (start + 2, 2)
 
 Function name: conditions::func_call
-Raw bytes (39): 0x[01, 01, 03, 01, 05, 09, 0b, 0d, 02, 05, 01, 25, 01, 01, 0a, 20, 05, 02, 01, 09, 00, 0a, 05, 00, 0e, 00, 0f, 20, 09, 0d, 00, 0e, 00, 0f, 07, 01, 01, 00, 02]
+Raw bytes (39): 0x[01, 01, 03, 01, 05, 0b, 02, 09, 0d, 05, 01, 25, 01, 01, 0a, 20, 05, 02, 01, 09, 00, 0a, 05, 00, 0e, 00, 0f, 20, 09, 0d, 00, 0e, 00, 0f, 07, 01, 01, 00, 02]
 Number of files: 1
 - file 0 => global file 1
 Number of expressions: 3
 - expression 0 operands: lhs = Counter(0), rhs = Counter(1)
-- expression 1 operands: lhs = Counter(2), rhs = Expression(2, Add)
-- expression 2 operands: lhs = Counter(3), rhs = Expression(0, Sub)
+- expression 1 operands: lhs = Expression(2, Add), rhs = Expression(0, Sub)
+- expression 2 operands: lhs = Counter(2), rhs = Counter(3)
 Number of file 0 mappings: 5
 - Code(Counter(0)) at (prev + 37, 1) to (start + 1, 10)
 - Branch { true: Counter(1), false: Expression(0, Sub) } at (prev + 1, 9) to (start + 0, 10)
@@ -140,7 +140,7 @@ Number of file 0 mappings: 5
     true  = c2
     false = c3
 - Code(Expression(1, Add)) at (prev + 1, 1) to (start + 0, 2)
-    = (c2 + (c3 + (c0 - c1)))
+    = ((c2 + c3) + (c0 - c1))
 
 Function name: conditions::simple_assign
 Raw bytes (9): 0x[01, 01, 00, 01, 01, 08, 01, 03, 02]