diff options
| author | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 2000-12-16 15:43:55 +0000 |
|---|---|---|
| committer | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 2000-12-16 15:43:55 +0000 |
| commit | cc2c38d4329f98f17fd0d3b6de9368a784e1e0f2 (patch) | |
| tree | f038cfee770b1c497ce8981dc1822218658b02ee /gcc/expmed.c | |
| parent | 66540ab6c18134a7ce5558fd684a0a6020620719 (diff) | |
* expmed.c (expand_mult): Write REG_EQUAL note with proper mode.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@38306 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index af5d36d6de1..351dfe4e7ff 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -2401,6 +2401,7 @@ expand_mult (mode, op0, op1, target, unsignedp) /* We found something cheaper than a multiply insn. */ int opno; rtx accum, tem; + enum machine_mode nmode; op0 = protect_from_queue (op0, 0); @@ -2505,12 +2506,21 @@ expand_mult (mode, op0, op1, target, unsignedp) } /* Write a REG_EQUAL note on the last insn so that we can cse - multiplication sequences. */ + multiplication sequences. Note that if ACCUM is a SUBREG, + we've set the inner register and must properly indicate + that. */ + + tem = op0, nmode = mode; + if (GET_CODE (accum) == SUBREG) + { + nmode = GET_MODE (SUBREG_REG (accum)); + tem = gen_lowpart (nmode, op0); + } insn = get_last_insn (); set_unique_reg_note (insn, REG_EQUAL, - gen_rtx_MULT (mode, op0, + gen_rtx_MULT (nmode, tem, GEN_INT (val_so_far))); } |