diff --git a/SingleSource/UnitTests/Vectorizer/Veclib/sincos.h b/SingleSource/UnitTests/Vectorizer/Veclib/sincos.h
--- a/SingleSource/UnitTests/Vectorizer/Veclib/sincos.h
+++ b/SingleSource/UnitTests/Vectorizer/Veclib/sincos.h
@@ -10,6 +10,23 @@
     }
 }
 
+// inner loop vectorization with linear access, assume safety
+void sincos_arr_assume_safety(REAL* sines, REAL* cosines, REAL* phases, int size) {
+#pragma clang loop vectorize(assume_safety)
+    for (int i=0; i<size; i++) {
+        SINCOS(phases[i], sines+i, cosines+i);
+    }
+}
+
+// dependent inner loop, not vectorizable
+void sincos_arr_dependent(REAL* sines, REAL* cosines, int size) {
+    SINCOS((REAL)0, sines, cosines);
+#pragma clang loop vectorize(enable)
+    for (int i=1; i<size; i++) {
+        SINCOS(cosines[i-1]-sines[i-1], sines+i, cosines+i);
+    }
+}
+
 // outer loop vectorization with linear access
 void sincos_arr_nested(REAL* sines, REAL* cosines, REAL* phases, int size, int nests) {
     for (int i=0; i<size; i++) {
@@ -77,14 +94,15 @@
     return 0;
 }
 
-int check_arr(REAL* sines, REAL* coses, REAL* phases, int* indices, int size, int nests, REAL max_ulp_err, const char* msg)
+int check_arr(REAL* sines, REAL* coses, REAL* phases, int* indices, int size, int dependent, int nests, REAL max_ulp_err, const char* msg)
 {
     int fail = 0;
 
     for (int i = 0; i < size; i++) {
         int j = indices ? indices[i] : i;
-        long double ref_sin = sinl(phases[j]);
-        long double ref_cos = cosl(phases[j]);
+        REAL phase = dependent ? (i > 0 ? coses[i-1] - sines[i-1] : 0) : phases[j];
+        long double ref_sin = sinl(phase);
+        long double ref_cos = cosl(phase);
         for (int k=0; k<nests; k++) {
                 REAL arg = ref_cos - ref_sin;
                 ref_sin = sinl(arg);
@@ -117,11 +135,15 @@
             coses[i] = 0.0 / 0.0;
         }
         sincos_arr(sines, coses, phases, N);
-        fail |= check_arr(sines, coses, phases, NULL, N, 0, MAX_ULP_ERR, "sincos_arr");
+        fail |= check_arr(sines, coses, phases, NULL, N, 0, 0, MAX_ULP_ERR, "sincos_arr");
+        sincos_arr_assume_safety(sines, coses, phases, N);
+        fail |= check_arr(sines, coses, phases, NULL, N, 0, 0, MAX_ULP_ERR, "sincos_arr_assume_safety");
+        sincos_arr_dependent(sines, coses, N);
+        fail |= check_arr(sines, coses, phases, NULL, N, 1, 0, MAX_ULP_ERR, "sincos_arr_dependent");
         sincos_arr_nested(sines, coses, phases, N, nests);
-        fail |= check_arr(sines, coses, phases, NULL, N, nests, MAX_ULP_ERR_NESTED, "sincos_arr_nested");
+        fail |= check_arr(sines, coses, phases, NULL, N, 0, nests, MAX_ULP_ERR_NESTED, "sincos_arr_nested");
         sincos_arr_nested_nounroll(sines, coses, phases, N, nests);
-        fail |= check_arr(sines, coses, phases, NULL, N, nests, MAX_ULP_ERR_NESTED, "sincos_arr_nested_nounroll");
+        fail |= check_arr(sines, coses, phases, NULL, N, 0, nests, MAX_ULP_ERR_NESTED, "sincos_arr_nested_nounroll");
 
         // test with nonlinear access:
         for (int i = 0; i < N; i++) {
@@ -130,11 +152,11 @@
             coses[i] = 0.0 / 0.0;
         }
         sincos_arr_scrambled(sines, coses, phases, indices, N);
-        fail |= check_arr(sines, coses, phases, indices, N, 0, MAX_ULP_ERR, "sincos_arr_scrambled");
+        fail |= check_arr(sines, coses, phases, indices, N, 0, 0, MAX_ULP_ERR, "sincos_arr_scrambled");
         sincos_arr_scrambled_nested(sines, coses, phases, indices, N, nests);
-        fail |= check_arr(sines, coses, phases, indices, N, nests, MAX_ULP_ERR_NESTED, "sincos_arr_scrambled_nested");
+        fail |= check_arr(sines, coses, phases, indices, N, 0, nests, MAX_ULP_ERR_NESTED, "sincos_arr_scrambled_nested");
         sincos_arr_scrambled_nested_nounroll(sines, coses, phases, indices, N, nests);
-        fail |= check_arr(sines, coses, phases, indices, N, nests, MAX_ULP_ERR_NESTED, "sincos_arr_scrambled_nested_nounroll");
+        fail |= check_arr(sines, coses, phases, indices, N, 0, nests, MAX_ULP_ERR_NESTED, "sincos_arr_scrambled_nested_nounroll");
     }
     if (fail) {
         printf("FAILED!\n");
diff --git a/SingleSource/UnitTests/Vectorizer/Veclib/sincos.reference_output b/SingleSource/UnitTests/Vectorizer/Veclib/sincos.reference_output
--- a/SingleSource/UnitTests/Vectorizer/Veclib/sincos.reference_output
+++ b/SingleSource/UnitTests/Vectorizer/Veclib/sincos.reference_output
@@ -6,6 +6,22 @@
 sincos_arr.cos at 16: argument 16, value -0.9576595, reference -0.9576595.
 sincos_arr.sin at 24: argument 24, value -0.9055784, reference -0.9055784.
 sincos_arr.cos at 24: argument 24, value  0.4241790, reference  0.4241790.
+sincos_arr_assume_safety.sin at  0: argument  0, value  0.0000000, reference  0.0000000.
+sincos_arr_assume_safety.cos at  0: argument  0, value  1.0000000, reference  1.0000000.
+sincos_arr_assume_safety.sin at  8: argument  8, value  0.9893582, reference  0.9893582.
+sincos_arr_assume_safety.cos at  8: argument  8, value -0.1455000, reference -0.1455000.
+sincos_arr_assume_safety.sin at 16: argument 16, value -0.2879033, reference -0.2879033.
+sincos_arr_assume_safety.cos at 16: argument 16, value -0.9576595, reference -0.9576595.
+sincos_arr_assume_safety.sin at 24: argument 24, value -0.9055784, reference -0.9055784.
+sincos_arr_assume_safety.cos at 24: argument 24, value  0.4241790, reference  0.4241790.
+sincos_arr_dependent.sin at  0: argument  0, value  0.0000000, reference  0.0000000.
+sincos_arr_dependent.cos at  0: argument  0, value  1.0000000, reference  1.0000000.
+sincos_arr_dependent.sin at  8: argument  8, value -0.7387255, reference -0.7387255.
+sincos_arr_dependent.cos at  8: argument  8, value  0.6740065, reference  0.6740065.
+sincos_arr_dependent.sin at 16: argument 16, value -0.7380653, reference -0.7380653.
+sincos_arr_dependent.cos at 16: argument 16, value  0.6747292, reference  0.6747292.
+sincos_arr_dependent.sin at 24: argument 24, value -0.7380653, reference -0.7380653.
+sincos_arr_dependent.cos at 24: argument 24, value  0.6747293, reference  0.6747293.
 sincos_arr_nested.sin at  0: argument  0, value  0.9875437, reference  0.9875437.
 sincos_arr_nested.cos at  0: argument  0, value  0.1573452, reference  0.1573452.
 sincos_arr_nested.sin at  8: argument  8, value -0.7380653, reference -0.7380653.
diff --git a/SingleSource/UnitTests/Vectorizer/Veclib/sincosf.reference_output b/SingleSource/UnitTests/Vectorizer/Veclib/sincosf.reference_output
--- a/SingleSource/UnitTests/Vectorizer/Veclib/sincosf.reference_output
+++ b/SingleSource/UnitTests/Vectorizer/Veclib/sincosf.reference_output
@@ -6,6 +6,22 @@
 sincos_arr.cos at 16: argument 16, value -0.9576595, reference -0.9576595.
 sincos_arr.sin at 24: argument 24, value -0.9055784, reference -0.9055784.
 sincos_arr.cos at 24: argument 24, value  0.4241790, reference  0.4241790.
+sincos_arr_assume_safety.sin at  0: argument  0, value  0.0000000, reference  0.0000000.
+sincos_arr_assume_safety.cos at  0: argument  0, value  1.0000000, reference  1.0000000.
+sincos_arr_assume_safety.sin at  8: argument  8, value  0.9893582, reference  0.9893582.
+sincos_arr_assume_safety.cos at  8: argument  8, value -0.1455000, reference -0.1455000.
+sincos_arr_assume_safety.sin at 16: argument 16, value -0.2879033, reference -0.2879033.
+sincos_arr_assume_safety.cos at 16: argument 16, value -0.9576595, reference -0.9576595.
+sincos_arr_assume_safety.sin at 24: argument 24, value -0.9055784, reference -0.9055784.
+sincos_arr_assume_safety.cos at 24: argument 24, value  0.4241790, reference  0.4241790.
+sincos_arr_dependent.sin at  0: argument  0, value  0.0000000, reference  0.0000000.
+sincos_arr_dependent.cos at  0: argument  0, value  1.0000000, reference  1.0000000.
+sincos_arr_dependent.sin at  8: argument  8, value -0.7387254, reference -0.7387254.
+sincos_arr_dependent.cos at  8: argument  8, value  0.6740065, reference  0.6740065.
+sincos_arr_dependent.sin at 16: argument 16, value -0.7380654, reference -0.7380654.
+sincos_arr_dependent.cos at 16: argument 16, value  0.6747292, reference  0.6747292.
+sincos_arr_dependent.sin at 24: argument 24, value -0.7380654, reference -0.7380654.
+sincos_arr_dependent.cos at 24: argument 24, value  0.6747292, reference  0.6747292.
 sincos_arr_nested.sin at  0: argument  0, value  0.9875436, reference  0.9875436.
 sincos_arr_nested.cos at  0: argument  0, value  0.1573451, reference  0.1573451.
 sincos_arr_nested.sin at  8: argument  8, value -0.7380654, reference -0.7380654.