[llvm-commits] CVS: llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp README.txt

[Nate Begeman]

Changes in directory llvm/lib/Target/PowerPC:

PPCISelDAGToDAG.cpp updated: 1.181 -> 1.182
README.txt updated: 1.86 -> 1.87
---
Log message:

Update some stuff now that the new rlwimi code has gone in


---
Diffs of the changes:  (+0 -70)

 PPCISelDAGToDAG.cpp |    1 
 README.txt          |   69 ----------------------------------------------------
 2 files changed, 70 deletions(-)


Index: llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
diff -u llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:1.181 llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:1.182
--- llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp:1.181	Sat May  6 19:23:38 2006
+++ llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp	Sun May  7 21:52:37 2006
@@ -405,7 +405,6 @@
   TLI.ComputeMaskedBits(Op0, TgtMask, LKZ, LKO);
   TLI.ComputeMaskedBits(Op1, TgtMask, RKZ, RKO);
   
-  // FIXME: rotrwi / rotlwi
   if ((LKZ | RKZ) == 0x00000000FFFFFFFFULL) {
     unsigned PInsMask = ~RKZ;
     unsigned PTgtMask = ~LKZ;


Index: llvm/lib/Target/PowerPC/README.txt
diff -u llvm/lib/Target/PowerPC/README.txt:1.86 llvm/lib/Target/PowerPC/README.txt:1.87
--- llvm/lib/Target/PowerPC/README.txt:1.86	Fri May  5 00:36:15 2006
+++ llvm/lib/Target/PowerPC/README.txt	Sun May  7 21:52:38 2006
@@ -85,75 +85,6 @@
 
 ===-------------------------------------------------------------------------===
 
-#define  ARRAY_LENGTH  16
-
-union bitfield {
-	struct {
-#ifndef	__ppc__
-		unsigned int                       field0 : 6;
-		unsigned int                       field1 : 6;
-		unsigned int                       field2 : 6;
-		unsigned int                       field3 : 6;
-		unsigned int                       field4 : 3;
-		unsigned int                       field5 : 4;
-		unsigned int                       field6 : 1;
-#else
-		unsigned int                       field6 : 1;
-		unsigned int                       field5 : 4;
-		unsigned int                       field4 : 3;
-		unsigned int                       field3 : 6;
-		unsigned int                       field2 : 6;
-		unsigned int                       field1 : 6;
-		unsigned int                       field0 : 6;
-#endif
-	} bitfields, bits;
-	unsigned int	u32All;
-	signed int	i32All;
-	float	f32All;
-};
-
-
-typedef struct program_t {
-	union bitfield    array[ARRAY_LENGTH];
-    int               size;
-    int               loaded;
-} program;
-
-
-void AdjustBitfields(program* prog, unsigned int fmt1)
-{
-        prog->array[0].bitfields.field0 = fmt1;
-        prog->array[0].bitfields.field1 = fmt1 + 1;
-}
-
-We currently generate:
-
-_AdjustBitfields:
-        lwz r2, 0(r3)
-        addi r5, r4, 1
-        rlwinm r2, r2, 0, 0, 19
-        rlwinm r5, r5, 6, 20, 25
-        rlwimi r2, r4, 0, 26, 31
-        or r2, r2, r5
-        stw r2, 0(r3)
-        blr
-
-We should teach someone that or (rlwimi, rlwinm) with disjoint masks can be
-turned into rlwimi (rlwimi)
-
-The better codegen would be:
-
-_AdjustBitfields:
-        lwz r0,0(r3)
-        rlwinm r4,r4,0,0xff
-        rlwimi r0,r4,0,26,31
-        addi r4,r4,1
-        rlwimi r0,r4,6,20,25
-        stw r0,0(r3)
-        blr
-
-===-------------------------------------------------------------------------===
-
 Compile this:
 
 int %f1(int %a, int %b) {