Validate fails due to overlapping pattern in StgCmmExpr

The failure due to -Werror:

compiler/codeGen/StgCmmExpr.hs:55:1:
    Warning: Pattern match(es) are overlapped
             In an equation for `cgExpr':
                 cgExpr (StgOpApp (StgPrimOp SeqOp) [StgVarArg a, _] _res_ty) = ...

<no location info>: 
Failing due to -Werror.

The special case for the new seq primop was below the general

cgExpr (StgOpApp op args ty) = cgOpApp op args ty

and thus would never have been reached. I moved it above (currently validating) to fix that.

Trac metadata

Trac field	Value
Version	7.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture