compiler: introduce custom "GhcPrelude" Prelude

This switches the compiler/ component to get compiled with
-XNoImplicitPrelude and a `import GhcPrelude` is inserted in all
modules.

This is motivated by the upcoming "Prelude" re-export of
`Semigroup((<>))` which would cause lots of name clashes in every
modulewhich imports also `Outputable`

Reviewers: austin, goldfire, bgamari, alanz, simonmar

Reviewed By: bgamari

Subscribers: goldfire, rwbarton, thomie, mpickering, bgamari

Differential Revision: https://phabricator.haskell.org/D3989

9 files changed, 18 insertions, 0 deletions

diff --git a/compiler/codeGen/CodeGen/Platform.hs b/compiler/codeGen/CodeGen/Platform.hs
index 80452d0585..3014a0596f 100644
--- a/compiler/codeGen/CodeGen/Platform.hs
+++ b/compiler/codeGen/CodeGen/Platform.hs
@@ -3,6 +3,8 @@ module CodeGen.Platform
        (callerSaves, activeStgRegs, haveRegBase, globalRegMaybe, freeReg)
        where
 
+import GhcPrelude
+
 import CmmExpr
 import Platform
 import Reg
diff --git a/compiler/codeGen/CodeGen/Platform/ARM.hs b/compiler/codeGen/CodeGen/Platform/ARM.hs
index 5d1148496c..a2cb476e04 100644
--- a/compiler/codeGen/CodeGen/Platform/ARM.hs
+++ b/compiler/codeGen/CodeGen/Platform/ARM.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.ARM where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_arm 1
 #include "../../../../includes/CodeGen.Platform.hs"
diff --git a/compiler/codeGen/CodeGen/Platform/ARM64.hs b/compiler/codeGen/CodeGen/Platform/ARM64.hs
index c3ebeda6bf..6ace181356 100644
--- a/compiler/codeGen/CodeGen/Platform/ARM64.hs
+++ b/compiler/codeGen/CodeGen/Platform/ARM64.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.ARM64 where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_aarch64 1
 #include "../../../../includes/CodeGen.Platform.hs"
diff --git a/compiler/codeGen/CodeGen/Platform/NoRegs.hs b/compiler/codeGen/CodeGen/Platform/NoRegs.hs
index 0c85ffbda7..4c074ee313 100644
--- a/compiler/codeGen/CodeGen/Platform/NoRegs.hs
+++ b/compiler/codeGen/CodeGen/Platform/NoRegs.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.NoRegs where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 1
 #include "../../../../includes/CodeGen.Platform.hs"
 
diff --git a/compiler/codeGen/CodeGen/Platform/PPC.hs b/compiler/codeGen/CodeGen/Platform/PPC.hs
index 76a2b020ac..f7eae6b4ca 100644
--- a/compiler/codeGen/CodeGen/Platform/PPC.hs
+++ b/compiler/codeGen/CodeGen/Platform/PPC.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.PPC where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_powerpc 1
 #include "../../../../includes/CodeGen.Platform.hs"
diff --git a/compiler/codeGen/CodeGen/Platform/PPC_Darwin.hs b/compiler/codeGen/CodeGen/Platform/PPC_Darwin.hs
index a98e558cc1..91923fd453 100644
--- a/compiler/codeGen/CodeGen/Platform/PPC_Darwin.hs
+++ b/compiler/codeGen/CodeGen/Platform/PPC_Darwin.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.PPC_Darwin where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_powerpc 1
 #define MACHREGS_darwin 1
diff --git a/compiler/codeGen/CodeGen/Platform/SPARC.hs b/compiler/codeGen/CodeGen/Platform/SPARC.hs
index 991f515eaf..5d8dbb1da9 100644
--- a/compiler/codeGen/CodeGen/Platform/SPARC.hs
+++ b/compiler/codeGen/CodeGen/Platform/SPARC.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.SPARC where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_sparc 1
 #include "../../../../includes/CodeGen.Platform.hs"
diff --git a/compiler/codeGen/CodeGen/Platform/X86.hs b/compiler/codeGen/CodeGen/Platform/X86.hs
index e74807ff88..84d52c1585 100644
--- a/compiler/codeGen/CodeGen/Platform/X86.hs
+++ b/compiler/codeGen/CodeGen/Platform/X86.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.X86 where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_i386 1
 #include "../../../../includes/CodeGen.Platform.hs"
diff --git a/compiler/codeGen/CodeGen/Platform/X86_64.hs b/compiler/codeGen/CodeGen/Platform/X86_64.hs
index 102132d679..1b2b5549ac 100644
--- a/compiler/codeGen/CodeGen/Platform/X86_64.hs
+++ b/compiler/codeGen/CodeGen/Platform/X86_64.hs
@@ -2,6 +2,8 @@
 
 module CodeGen.Platform.X86_64 where
 
+import GhcPrelude
+
 #define MACHREGS_NO_REGS 0
 #define MACHREGS_x86_64 1
 #include "../../../../includes/CodeGen.Platform.hs"