4.3.4 -case, (-nocase), -ncase

The -case switch tells KAP to distinguish between uppercase and lowercase in identifier names. The default -nocase tells KAP to be case insensitive in variable names.

When KAP inserts or modifies lines in a program, it usually creates the new code in all capital letters. The -case switch requires KAP to preserve the original case of variables in the new code.

In the following example, the -nocase default would cause KAP to interpret N and n as the same variable. This presents an unoptimizable data dependence in the loop.

n = N + 1
    DO 10 I = 2,100
      A(I,N) = A(I-1,n)
  10  CONTINUE

When the -case switch is specified, N and n are treated as different variables. The Global Forward Substitution pass of KAP recognizes the assignment of different values to N and n and resolves the data dependence.

DO 2 I=2,100
      A(I,N) = A(I-1,N+1)
2  CONTINUE

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