diff options
Diffstat (limited to 'compiler/cmm/CmmExpr.hs')
| -rw-r--r-- | compiler/cmm/CmmExpr.hs | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/compiler/cmm/CmmExpr.hs b/compiler/cmm/CmmExpr.hs index 80ca1b1ef2..46f772731b 100644 --- a/compiler/cmm/CmmExpr.hs +++ b/compiler/cmm/CmmExpr.hs @@ -189,9 +189,13 @@ data CmmLit -- It is also used inside the NCG during when generating -- position-independent code. | CmmLabelDiffOff CLabel CLabel Int Width -- label1 - label2 + offset - -- The supported Widths depend on the architecture. wordWidth - -- is supported on all architectures. Additionally W32 is - -- supported on x86_64 when using the small memory model. + -- In an expression, the width just has the effect of MO_SS_Conv + -- from wordWidth to the desired width. + -- + -- In a static literal, the supported Widths depend on the + -- architecture: wordWidth is supported on all + -- architectures. Additionally W32 is supported on x86_64 when + -- using the small memory model. | CmmBlock {-# UNPACK #-} !BlockId -- Code label -- Invariant: must be a continuation BlockId @@ -224,7 +228,7 @@ cmmLitType cflags (CmmVec (l:ls)) = let ty = cmmLitType cflags l else panic "cmmLitType: CmmVec" cmmLitType dflags (CmmLabel lbl) = cmmLabelType dflags lbl cmmLitType dflags (CmmLabelOff lbl _) = cmmLabelType dflags lbl -cmmLitType dflags (CmmLabelDiffOff _ _ _ width) = cmmBits width +cmmLitType _ (CmmLabelDiffOff _ _ _ width) = cmmBits width cmmLitType dflags (CmmBlock _) = bWord dflags cmmLitType dflags (CmmHighStackMark) = bWord dflags |