diff options
| author | Sylvain Henry <sylvain@haskus.fr> | 2020-11-03 12:41:09 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-11-04 16:48:42 -0500 |
| commit | 81560981fd9af7ea21b2592c405e9e22af838aab (patch) | |
| tree | 9c6abd5b4b85f0990581567ef2f28d147d5601a7 /compiler/GHC | |
| parent | b790b7f91104197429cd80e2c192a6fcda9dd6b4 (diff) | |
| download | haskell-81560981fd9af7ea21b2592c405e9e22af838aab.tar.gz | |
Don't use LEA with 8-bit registers (#18614)
Diffstat (limited to 'compiler/GHC')
| -rw-r--r-- | compiler/GHC/CmmToAsm/X86/CodeGen.hs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/compiler/GHC/CmmToAsm/X86/CodeGen.hs b/compiler/GHC/CmmToAsm/X86/CodeGen.hs index 0f982b8d56..4480848b90 100644 --- a/compiler/GHC/CmmToAsm/X86/CodeGen.hs +++ b/compiler/GHC/CmmToAsm/X86/CodeGen.hs @@ -1052,7 +1052,9 @@ getRegister' _ is32Bit (CmmMachOp mop [x, y]) = -- dyadic MachOps -------------------- add_code :: Width -> CmmExpr -> CmmExpr -> NatM Register add_code rep x (CmmLit (CmmInt y _)) - | is32BitInteger y = add_int rep x y + | is32BitInteger y + , rep /= W8 -- LEA doesn't support byte size (#18614) + = add_int rep x y add_code rep x y = trivialCode rep (ADD format) (Just (ADD format)) x y where format = intFormat rep -- TODO: There are other interesting patterns we want to replace @@ -1061,7 +1063,9 @@ getRegister' _ is32Bit (CmmMachOp mop [x, y]) = -- dyadic MachOps -------------------- sub_code :: Width -> CmmExpr -> CmmExpr -> NatM Register sub_code rep x (CmmLit (CmmInt y _)) - | is32BitInteger (-y) = add_int rep x (-y) + | is32BitInteger (-y) + , rep /= W8 -- LEA doesn't support byte size (#18614) + = add_int rep x (-y) sub_code rep x y = trivialCode rep (SUB (intFormat rep)) Nothing x y -- our three-operand add instruction: |