diff options
Diffstat (limited to 'compiler/GHC/CmmToAsm/PPC/CodeGen.hs')
| -rw-r--r-- | compiler/GHC/CmmToAsm/PPC/CodeGen.hs | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/compiler/GHC/CmmToAsm/PPC/CodeGen.hs b/compiler/GHC/CmmToAsm/PPC/CodeGen.hs index 6d7f61d56d..844e4744da 100644 --- a/compiler/GHC/CmmToAsm/PPC/CodeGen.hs +++ b/compiler/GHC/CmmToAsm/PPC/CodeGen.hs @@ -2143,12 +2143,14 @@ genSwitch config expr targets ] return code where - indexExpr = cmmOffset platform exprWidened offset + -- See Note [Sub-word subtlety during jump-table indexing] in + -- GHC.CmmToAsm.X86.CodeGen for why we must first offset, then widen. + indexExpr0 = cmmOffset platform expr offset -- We widen to a native-width register to santize the high bits - exprWidened = CmmMachOp - (MO_UU_Conv (cmmExprWidth platform expr) - (platformWordWidth platform)) - [expr] + indexExpr = CmmMachOp + (MO_UU_Conv expr_w (platformWordWidth platform)) + [indexExpr0] + expr_w = cmmExprWidth platform expr (offset, ids) = switchTargetsToTable targets platform = ncgPlatform config |