Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu

* Removed test/lib/llvm.exp - it is no longer needed 
* Deleted the dg.exp reading code from test/lit.cfg. There are no dg.exp files
  left in the test suite so this code is no longer required. test/lit.cfg is
  now much shorter and clearer 
* Removed a lot of duplicate code in lit.local.cfg files that need access to
  the root configuration, by adding a "root" attribute to the TestingConfig
  object. This attribute is dynamically computed to provide the same
  information as was previously provided by the custom getRoot functions. 
* Documented the config.root attribute in docs/CommandGuide/lit.pod





git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153408 91177308-0d34-0410-b5e6-96231b3b80d8

17 files changed, 17 insertions, 136 deletions

diff --git a/test/CodeGen/ARM/lit.local.cfg b/test/CodeGen/ARM/lit.local.cfg
index dd6c50d4fe4..cb77b09ef4a 100644
--- a/test/CodeGen/ARM/lit.local.cfg
+++ b/test/CodeGen/ARM/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'ARM' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/CBackend/X86/lit.local.cfg b/test/CodeGen/CBackend/X86/lit.local.cfg
index 037d8c3910d..f2d1cc7d7b0 100644
--- a/test/CodeGen/CBackend/X86/lit.local.cfg
+++ b/test/CodeGen/CBackend/X86/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'CBackend' in targets or not 'X86' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/CBackend/lit.local.cfg b/test/CodeGen/CBackend/lit.local.cfg
index 0dce1702a79..869e52962f6 100644
--- a/test/CodeGen/CBackend/lit.local.cfg
+++ b/test/CodeGen/CBackend/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'CBackend' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/CPP/lit.local.cfg b/test/CodeGen/CPP/lit.local.cfg
index 96596d85f6e..4d4b4a4a7e2 100644
--- a/test/CodeGen/CPP/lit.local.cfg
+++ b/test/CodeGen/CPP/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'CppBackend' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/CellSPU/lit.local.cfg b/test/CodeGen/CellSPU/lit.local.cfg
index 6ae0972b66c..ea00867701b 100644
--- a/test/CodeGen/CellSPU/lit.local.cfg
+++ b/test/CodeGen/CellSPU/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'CellSPU' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/Hexagon/lit.local.cfg b/test/CodeGen/Hexagon/lit.local.cfg
index ea12f68870e..24324b2792e 100644
--- a/test/CodeGen/Hexagon/lit.local.cfg
+++ b/test/CodeGen/Hexagon/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'Hexagon' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/MBlaze/lit.local.cfg b/test/CodeGen/MBlaze/lit.local.cfg
index e43df89e196..e236200d757 100644
--- a/test/CodeGen/MBlaze/lit.local.cfg
+++ b/test/CodeGen/MBlaze/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'MBlaze' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/MSP430/lit.local.cfg b/test/CodeGen/MSP430/lit.local.cfg
index b9b654deba5..972732ebad3 100644
--- a/test/CodeGen/MSP430/lit.local.cfg
+++ b/test/CodeGen/MSP430/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'MSP430' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/Mips/lit.local.cfg b/test/CodeGen/Mips/lit.local.cfg
index e1cd73a3786..0587d3243e6 100644
--- a/test/CodeGen/Mips/lit.local.cfg
+++ b/test/CodeGen/Mips/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'Mips' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/PTX/lit.local.cfg b/test/CodeGen/PTX/lit.local.cfg
index 73990890766..e748f7f05b3 100644
--- a/test/CodeGen/PTX/lit.local.cfg
+++ b/test/CodeGen/PTX/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'PTX' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/PowerPC/lit.local.cfg b/test/CodeGen/PowerPC/lit.local.cfg
index 5c7f2677f35..4019eca0bb8 100644
--- a/test/CodeGen/PowerPC/lit.local.cfg
+++ b/test/CodeGen/PowerPC/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'PowerPC' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/SPARC/lit.local.cfg b/test/CodeGen/SPARC/lit.local.cfg
index ba81a16057c..786fee9e661 100644
--- a/test/CodeGen/SPARC/lit.local.cfg
+++ b/test/CodeGen/SPARC/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'Sparc' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/Thumb/lit.local.cfg b/test/CodeGen/Thumb/lit.local.cfg
index dd6c50d4fe4..cb77b09ef4a 100644
--- a/test/CodeGen/Thumb/lit.local.cfg
+++ b/test/CodeGen/Thumb/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'ARM' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/Thumb2/lit.local.cfg b/test/CodeGen/Thumb2/lit.local.cfg
index dd6c50d4fe4..cb77b09ef4a 100644
--- a/test/CodeGen/Thumb2/lit.local.cfg
+++ b/test/CodeGen/Thumb2/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'ARM' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/X86/GC/lit.local.cfg b/test/CodeGen/X86/GC/lit.local.cfg
index b05ed3c77c1..a8ad0f1a28b 100644
--- a/test/CodeGen/X86/GC/lit.local.cfg
+++ b/test/CodeGen/X86/GC/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'X86' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/X86/lit.local.cfg b/test/CodeGen/X86/lit.local.cfg
index b05ed3c77c1..a8ad0f1a28b 100644
--- a/test/CodeGen/X86/lit.local.cfg
+++ b/test/CodeGen/X86/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'X86' in targets:
     config.unsupported = True
 
diff --git a/test/CodeGen/XCore/lit.local.cfg b/test/CodeGen/XCore/lit.local.cfg
index c697912418e..f8726af57f7 100644
--- a/test/CodeGen/XCore/lit.local.cfg
+++ b/test/CodeGen/XCore/lit.local.cfg
@@ -1,13 +1,6 @@
 config.suffixes = ['.ll', '.c', '.cpp']
 
-def getRoot(config):
-    if not config.parent:
-        return config
-    return getRoot(config.parent)
-
-root = getRoot(config)
-
-targets = set(root.targets_to_build.split())
+targets = set(config.root.targets_to_build.split())
 if not 'XCore' in targets:
     config.unsupported = True