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riscv-gcc-1
Commit a77b7e32 by Roger Sayle Committed by Roger Sayle
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* cse.c (cse_insn): Avoid redundant REG_EQUAL notes. 

From-SVN: r61971
parent 4ff71d24
Showing with 13 additions and 5 deletions
gcc/ChangeLog
2003-01-28 Roger Sayle <roger@eyesopen.com>
* cse.c (cse_insn): Avoid redundant REG_EQUAL notes.
2003-01-28 Richard Sandiford <rsandifo@redhat.com> 2003-01-28 Richard Sandiford <rsandifo@redhat.com>
* config/sh/sh.h (CLASS_MAX_NREGS): If TARGET_SHMEDIA, and the given * config/sh/sh.h (CLASS_MAX_NREGS): If TARGET_SHMEDIA, and the given
......
gcc/cse.c
...@@ -5684,12 +5684,16 @@ cse_insn (insn, libcall_insn) ...@@ -5684,12 +5684,16 @@ cse_insn (insn, libcall_insn)
&& GET_CODE (XEXP (XEXP (src_const, 0), 0)) == LABEL_REF && GET_CODE (XEXP (XEXP (src_const, 0), 0)) == LABEL_REF
&& GET_CODE (XEXP (XEXP (src_const, 0), 1)) == LABEL_REF)) && GET_CODE (XEXP (XEXP (src_const, 0), 1)) == LABEL_REF))
{ {
/* Make sure that the rtx is not shared with any other insn. */ /* We only want a REG_EQUAL note if src_const != src. */
src_const = copy_rtx (src_const); if (! rtx_equal_p (src, src_const))
{
/* Make sure that the rtx is not shared. */
src_const = copy_rtx (src_const);
/* Record the actual constant value in a REG_EQUAL note, making /* Record the actual constant value in a REG_EQUAL note,
a new one if one does not already exist. */ making a new one if one does not already exist. */
set_unique_reg_note (insn, REG_EQUAL, src_const); set_unique_reg_note (insn, REG_EQUAL, src_const);
}
/* If storing a constant value in a register that /* If storing a constant value in a register that
previously held the constant value 0, previously held the constant value 0,
......
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