This is a fix for my PR70890 patch, which incorrectly removed all
REG_EQUIV notes rather than just one regarding a reg that dies.
Bootstrapped and regression tested powerpc64le-linux,
x86_64-linux, and mips-linux. OK to apply?
PR rtl-optimization/78325
PR rtl-optimization/70890
* ira.c (combine_and_move_insns): Only remove REG_EQUIV notes
for dead regno.
diff --git a/gcc/ira.c b/gcc/ira.c
index 315b847..4ee99d7 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -3747,7 +3747,7 @@ combine_and_move_insns (void)
use_insn, when regno was seen as non-local. Now that
regno is local to this block, and dies, such an
equivalence is invalid. */
- if (find_reg_note (use_insn, REG_EQUIV, NULL_RTX))
+ if (find_reg_note (use_insn, REG_EQUIV, regno_reg_rtx[regno]))
{
rtx set = single_set (use_insn);
if (set && REG_P (SET_DEST (set)))
--
Alan Modra
Australia Development Lab, IBM
