Compress flags in X86 op folding to reduce space in static tables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159073 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index f2c696b..a566a36 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -55,12 +55,24 @@
enum {
// Select which memory operand is being unfolded.
- // (stored in bits 0 - 7)
+ // (stored in bits 0 - 3)
TB_INDEX_0 = 0,
TB_INDEX_1 = 1,
TB_INDEX_2 = 2,
TB_INDEX_3 = 3,
- TB_INDEX_MASK = 0xff,
+ TB_INDEX_MASK = 0xf,
+
+ // Do not insert the reverse map (MemOp -> RegOp) into the table.
+ // This may be needed because there is a many -> one mapping.
+ TB_NO_REVERSE = 1 << 4,
+
+ // Do not insert the forward map (RegOp -> MemOp) into the table.
+ // This is needed for Native Client, which prohibits branch
+ // instructions from using a memory operand.
+ TB_NO_FORWARD = 1 << 5,
+
+ TB_FOLDED_LOAD = 1 << 6,
+ TB_FOLDED_STORE = 1 << 7,
// Minimum alignment required for load/store.
// Used for RegOp->MemOp conversion.
@@ -69,25 +81,13 @@
TB_ALIGN_NONE = 0 << TB_ALIGN_SHIFT,
TB_ALIGN_16 = 16 << TB_ALIGN_SHIFT,
TB_ALIGN_32 = 32 << TB_ALIGN_SHIFT,
- TB_ALIGN_MASK = 0xff << TB_ALIGN_SHIFT,
-
- // Do not insert the reverse map (MemOp -> RegOp) into the table.
- // This may be needed because there is a many -> one mapping.
- TB_NO_REVERSE = 1 << 16,
-
- // Do not insert the forward map (RegOp -> MemOp) into the table.
- // This is needed for Native Client, which prohibits branch
- // instructions from using a memory operand.
- TB_NO_FORWARD = 1 << 17,
-
- TB_FOLDED_LOAD = 1 << 18,
- TB_FOLDED_STORE = 1 << 19
+ TB_ALIGN_MASK = 0xff << TB_ALIGN_SHIFT
};
struct X86OpTblEntry {
uint16_t RegOp;
uint16_t MemOp;
- uint32_t Flags;
+ uint16_t Flags;
};
X86InstrInfo::X86InstrInfo(X86TargetMachine &tm)