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objtool: Remove useless tests before save_reg() 

save_reg already checks that the register being saved does not already
have a saved state.

Remove redundant checks before processing a register storing operation.

Signed-off-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
This commit is contained in:
Julien Thierry 2020-09-15 08:53:16 +01:00 committed by Josh Poimboeuf
parent edea9e6bcb
commit f4f803984c
1 changed files with 2 additions and 4 deletions
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6
tools/objtool/check.c
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@ -2030,7 +2030,7 @@ static int update_cfi_state(struct instruction *insn, struct cfi_state *cfi,
/* drap: push %rbp */
cfi->stack_size = 0;
} else if (regs[op->src.reg].base == CFI_UNDEFINED) {
} else {
/* drap: push %reg */
save_reg(cfi, op->src.reg, CFI_BP, -cfi->stack_size);
@ -2059,9 +2059,7 @@ static int update_cfi_state(struct instruction *insn, struct cfi_state *cfi,
/* save drap offset so we know when to restore it */
cfi->drap_offset = op->dest.offset;
}
else if (regs[op->src.reg].base == CFI_UNDEFINED) {
} else {
/* drap: mov reg, disp(%rbp) */
save_reg(cfi, op->src.reg, CFI_BP, op->dest.offset);