[project @ 2001-12-10 18:04:51 by sewardj]

Add just enough infrastructure to the NCG that it can deal with simple 64-bit
code on 32-bit platforms.  Main changes are:

* Addition of a simple 64-bit instruction selection fn iselExpr64 to MachCode.
  This generates code for a 64-bit value and places the results into two
  virtual registers, related thusly:

* Add a new type VRegUnique, which is used to label Stix virtual registers.
  This type used to be a plain Unique, but that forces the assumption that
  each Abstract-C level C temporary corresponds to exactly one Stix virtual
  register, which is untrue when the C temporary is 64-bit sized on a
  32-bit machine.  In the new scheme, the Unique for the C temporary can
  turn into two related VRegUniques, related by having the same embedded
  unique.

* Made a start on 'target metrics' by adding ncg_target_is_32bits to the
  end of Stix.lhs.

* Cleaned up numerous other gruesomenesses in the NCG which never came
  to light before now.   Got rid of MachMisc.sizeOf, which doesn't make
  sense in a 64-bit setting, and replaced it by calls to
  PrimRep.getPrimRepArrayElemSize, which, as far as I'm concerned, is the
  definitive answer to the questio `How Big Is This PrimRep Really?'

Result: on x86-linux, at least, you can now compile the Entire Prelude
with -fasm!  At this stage I cannot claim that the resulting code is
correct, but it's a start.

1 files changed, 1 insertions, 13 deletions

diff --git a/ghc/compiler/nativeGen/MachMisc.lhs b/ghc/compiler/nativeGen/MachMisc.lhs
index ce88dd3f14..4aa230be7b 100644
--- a/ghc/compiler/nativeGen/MachMisc.lhs
+++ b/ghc/compiler/nativeGen/MachMisc.lhs
@@ -8,7 +8,7 @@
 
 module MachMisc (
 
-	sizeOf, primRepToSize,
+	primRepToSize,
 
 	eXTRA_STK_ARGS_HERE,
 
@@ -93,18 +93,6 @@ eXTRA_STK_ARGS_HERE
 
 % - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
-Size of a @PrimRep@, in bytes.
-
-\begin{code}
-sizeOf :: PrimRep -> Int{-in bytes-}
-sizeOf pr = case primRepToSize pr of
-  IF_ARCH_alpha({B->1; Bu->1; {-W->2; Wu->2;-} L->4; {-SF->4;-} Q->8; TF->8},)
-  IF_ARCH_i386 ({B->1; Bu->1; W->2; Wu->2; L->4; Lu->4; F->4; DF->8; F80->10},)
-  IF_ARCH_sparc({B->1; Bu->1; W->4; F->4; DF->8},)
-\end{code}
-
-% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
 Now the volatile saves and restores.  We add the basic guys to the
 list of ``user'' registers provided.  Note that there are more basic
 registers on the restore list, because some are reloaded from