[flang] Build a dedicated fir-test-opt for testing

Rather than having different passes inside `fir-opt` depending
on the value of `FLANG_INCLUDE_TESTS`, build two separate executables:
regular `fir-opt` tool that is going to be installed,
and a `fir-test-opt` to be used in the test suite.  This ensures that
`fir-opt` behaves consistently independently of `FLANG_INCLUDE_TESTS`
value used during the build, and a test-enabled build can be used
on production.  It also avoids mixing dynamic libMLIR with static
libraries (needed for test-related parts) in release executables.

Fixes #121202

Author: mgorny

flang/test/Analysis/AliasAnalysis/alias-analysis-1.fir

@@ -1,6 +1,6 @@
 // Use --mlir-disable-threading so that the AA queries are serialized
 // as well as its diagnostic output.
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // CHECK-LABEL: Testing : "_QPtest"
 // CHECK-DAG: alloca_1#0 <-> address_of#0: NoAlias

flang/test/Analysis/AliasAnalysis/alias-analysis-2.fir

@@ -1,6 +1,6 @@
 // Use --mlir-disable-threading so that the AA queries are serialized
 // as well as its diagnostic output.
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // CHECK-LABEL: Testing : "_QFPtest"
 

flang/test/Analysis/AliasAnalysis/alias-analysis-3.fir

@@ -1,6 +1,6 @@
 // Use --mlir-disable-threading so that the AA queries are serialized
 // as well as its diagnostic output.
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // module m
 //   type t

flang/test/Analysis/AliasAnalysis/alias-analysis-4.fir

@@ -2,7 +2,7 @@
 
 // use --mlir-disable-threading so that the AA queries are serialised
 // as well as its diagnostic output.
-// RUN: fir-opt %s --test-fir-alias-analysis -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s --test-fir-alias-analysis -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // designate for a derived type component:
 // module m

flang/test/Analysis/AliasAnalysis/alias-analysis-5.fir

@@ -1,6 +1,6 @@
 // Use --mlir-disable-threading so that the AA queries are serialized
 // as well as its diagnostic output.
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // CHECK-LABEL: Testing : "_QPtest1"
 // CHECK: arraya(ii)#0 <-> arrayc(ii)#0: NoAlias

flang/test/Analysis/AliasAnalysis/alias-analysis-6.fir

@@ -1,4 +1,4 @@
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' 2>&1 | FileCheck %s
 
 // CHECK: test_y(1)#0 <-> test_x(1)#0: MayAlias
 func.func @_QPtest(%arg0: !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>> {fir.bindc_name = "y"}) {

flang/test/Analysis/AliasAnalysis/alias-analysis-7.fir

@@ -1,4 +1,4 @@
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' 2>&1 | FileCheck %s
 
 // leslie3d case with two allocatable module variables
 // that cannot alias:

flang/test/Analysis/AliasAnalysis/alias-analysis-8.fir

@@ -1,4 +1,4 @@
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' 2>&1 | FileCheck %s
 
 // Exercise that a box reference does not alias with the address loaded from the box
 // module mm

flang/test/Analysis/AliasAnalysis/alias-analysis-9.fir

@@ -1,6 +1,6 @@
 // Use --mlir-disable-threading so that the AA queries are serialized
 // as well as its diagnostic output.
-// RUN: fir-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s -pass-pipeline='builtin.module(func.func(test-fir-alias-analysis))' -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // Fortran source code:
 // program TestTmpArrayAssignment

flang/test/Analysis/AliasAnalysis/alias-analysis-host-assoc.fir

@@ -1,5 +1,5 @@
 // Test alias analysis queries for host associated accesses.
-// RUN: fir-opt %s --test-fir-alias-analysis -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
+// RUN: fir-test-opt %s --test-fir-alias-analysis -split-input-file --mlir-disable-threading 2>&1 | FileCheck %s
 
 // subroutine test1
 //   integer :: x(10)