On 23 Mar 2011, at 14:52, "Chung-Lin Tang" <clt...@codesourcery.com> wrote:
> Hi, in the ARM "casesi" expand pattern, when the table base index > constant is 0x8000000, it is stored sign extended as an rtx (const_int > 0xffffffff8000000) (assuming 64-bit HOST_WIDE_INT). > > Subtraction by adding GEN_INT(-INTVAL(operands[1])) then creates > (const_int 0x80000000), which is not sign-extended, and fails to match > the nonmemory_operand predicate later, causing a extract_insn failure > ICE. So the fix is to use gen_int_mode() instead of GEN_INT, which does > the needed sign-extension. > > Cross-tested on QEMU without regressions, okay for trunk? > > Thanks, > Chung-Lin > <pr46934.diff> Ok. R.
