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| author | Richard Kenner <kenner@gcc.gnu.org> | 1992-10-09 07:30:07 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1992-10-09 07:30:07 -0400 |
| commit | cb00f51acf20fd1ff03cd9d4fdb74bb12bd71da5 (patch) | |
| tree | 62be2713d5be279e5f8dff73223f3d5af6399da2 | |
| parent | 26ecfc761475c40d3de6aa7eca1595722888937e (diff) | |
| download | gcc-cb00f51acf20fd1ff03cd9d4fdb74bb12bd71da5.zip gcc-cb00f51acf20fd1ff03cd9d4fdb74bb12bd71da5.tar.gz gcc-cb00f51acf20fd1ff03cd9d4fdb74bb12bd71da5.tar.bz2 | |
(gen_lowpart_common, gen_highpart, operand_subword): Don't make a new
REG for stack, frame, or arg pointer.
From-SVN: r2382
| -rw-r--r-- | gcc/emit-rtl.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index d301bfc..f13d0d7 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -529,7 +529,14 @@ gen_lowpart_common (mode, x) else if (REGNO (x) < FIRST_PSEUDO_REGISTER /* integrate.c can't handle parts of a return value register. */ && (! REG_FUNCTION_VALUE_P (x) - || ! rtx_equal_function_value_matters)) + || ! rtx_equal_function_value_matters) + /* We want to keep the stack, frame, and arg pointers + special. */ + && REGNO (x) != FRAME_POINTER_REGNUM +#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM + && REGNO (x) != ARG_POINTER_REGNUM +#endif + && REGNO (x) != STACK_POINTER_REGNUM) return gen_rtx (REG, mode, REGNO (x) + word); else return gen_rtx (SUBREG, mode, x, word); @@ -776,7 +783,13 @@ gen_highpart (mode, x) - MAX (GET_MODE_SIZE (mode), UNITS_PER_WORD)) / UNITS_PER_WORD); #endif - if (REGNO (x) < FIRST_PSEUDO_REGISTER) + if (REGNO (x) < FIRST_PSEUDO_REGISTER + /* We want to keep the stack, frame, and arg pointers special. */ + && REGNO (x) != FRAME_POINTER_REGNUM +#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM + && REGNO (x) != ARG_POINTER_REGNUM +#endif + && REGNO (x) != STACK_POINTER_REGNUM) return gen_rtx (REG, mode, REGNO (x) + word); else return gen_rtx (SUBREG, mode, x, word); @@ -860,7 +873,14 @@ operand_subword (op, i, validate_address, mode) return 0; else if (REGNO (op) >= FIRST_PSEUDO_REGISTER || (REG_FUNCTION_VALUE_P (op) - && rtx_equal_function_value_matters)) + && rtx_equal_function_value_matters) + /* We want to keep the stack, frame, and arg pointers + special. */ + || REGNO (op) == FRAME_POINTER_REGNUM +#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM + || REGNO (op) == ARG_POINTER_REGNUM +#endif + || REGNO (op) == STACK_POINTER_REGNUM) return gen_rtx (SUBREG, word_mode, op, i); else return gen_rtx (REG, word_mode, REGNO (op) + i); |