diff options
Diffstat (limited to 'includes/CodeGen.Platform.hs')
| -rw-r--r-- | includes/CodeGen.Platform.hs | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/includes/CodeGen.Platform.hs b/includes/CodeGen.Platform.hs index 8e93690038..664942d878 100644 --- a/includes/CodeGen.Platform.hs +++ b/includes/CodeGen.Platform.hs @@ -837,15 +837,16 @@ freeReg :: RegNo -> Bool # if defined(MACHREGS_i386) freeReg esp = False -- %esp is the C stack pointer -freeReg esi = False -- Note [esi/edi not allocatable] +freeReg esi = False -- Note [esi/edi/ebp not allocatable] freeReg edi = False +freeReg ebp = False # endif # if defined(MACHREGS_x86_64) freeReg rsp = False -- %rsp is the C stack pointer # endif {- -Note [esi/edi not allocatable] +Note [esi/edi/ebp not allocatable] %esi is mapped to R1, so %esi would normally be allocatable while it is not being used for R1. However, %esi has no 8-bit version on x86, @@ -855,7 +856,7 @@ graph-colouring allocator also cannot handle this - it was designed with more flexibility in mind, but the current implementation is restricted to the same set of classes as the linear allocator. -Hence, on x86 esi and edi are treated as not allocatable. +Hence, on x86 esi, edi and ebp are treated as not allocatable. -} -- split patterns in two functions to prevent overlaps |