[X86] Enable 8-bit OR with disjoint bits to convert to LEA
We already support 8-bits adds in convertToThreeAddress. But we can also support 8-bit OR if the bits are disjoint. We already do this for 16/32/64.
Differential Revision: https://reviews.llvm.org/D58863
llvm-svn: 355423
diff --git a/llvm/lib/Target/X86/X86InstrFoldTables.cpp b/llvm/lib/Target/X86/X86InstrFoldTables.cpp
index 17ef1d67af..5cd327f 100644
--- a/llvm/lib/Target/X86/X86InstrFoldTables.cpp
+++ b/llvm/lib/Target/X86/X86InstrFoldTables.cpp
@@ -65,7 +65,9 @@
{ X86::ADD64rr_DB, X86::ADD64mr, TB_NO_REVERSE },
{ X86::ADD8ri, X86::ADD8mi, 0 },
{ X86::ADD8ri8, X86::ADD8mi8, 0 },
+ { X86::ADD8ri_DB, X86::ADD8mi, TB_NO_REVERSE },
{ X86::ADD8rr, X86::ADD8mr, 0 },
+ { X86::ADD8rr_DB, X86::ADD8mr, TB_NO_REVERSE },
{ X86::AND16ri, X86::AND16mi, 0 },
{ X86::AND16ri8, X86::AND16mi8, 0 },
{ X86::AND16rr, X86::AND16mr, 0 },
@@ -1218,6 +1220,7 @@
{ X86::ADD64rr, X86::ADD64rm, 0 },
{ X86::ADD64rr_DB, X86::ADD64rm, TB_NO_REVERSE },
{ X86::ADD8rr, X86::ADD8rm, 0 },
+ { X86::ADD8rr_DB, X86::ADD8rm, TB_NO_REVERSE },
{ X86::ADDPDrr, X86::ADDPDrm, TB_ALIGN_16 },
{ X86::ADDPSrr, X86::ADDPSrm, TB_ALIGN_16 },
{ X86::ADDSDrr, X86::ADDSDrm, 0 },