fix mixed up comments

[tim.schmielau]

This was supposed to update https://reviews.llvm.org/D120977 instead of creating a new submission.

SingleSource/UnitTests/Vectorizer/Libmvec/sincos.c

 #define _GNU_SOURCE
 
 #include <stdio.h>
 #include <math.h>
 
 // inner loop vectorization with linear access
 void sincos_arr(double* sines, double* cosines, double* phases, int size) {
     for (int i=0; i<size; i++) {
         sincos(phases[i], sines+i, cosines+i);
     }
 }
 
-// inner loop vectorization with nonlinear access
+// outer loop vectorization with linear access
 void sincos_arr_nested(double* sines, double* cosines, double* phases, int size, int nests) {
     for (int i=0; i<size; i++) {
         sincos(phases[i], sines+i, cosines+i);
         for (int k=0; k<nests; k++) {
             sincos(sines[i]+cosines[i], sines+i, cosines+i);
         }
     }
 }
 
-// outer loop vectorization with linear access
+// inner loop vectorization with nonlinear access
 void sincos_arr_scrambled(double* sines, double* cosines, double* phases, int* indices, int size) {
     for (int i=0; i<size; i++) {
         int j = indices[i];
         sincos(phases[j], sines+j, cosines+j);
     }
 }
 
 // outer loop vectorization with nonlinear access