linux-kernel - [RFC v5 01/57] objtool: check: Remove redundant checks on operand type

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Message-Id: <20200109160300.26150-2-jthierry@redhat.com>
Date:   Thu,  9 Jan 2020 16:02:04 +0000
From:   Julien Thierry <jthierry@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org, raphael.gault@....com,
        catalin.marinas@....com, will@...nel.org,
        Julien Thierry <jthierry@...hat.com>
Subject: [RFC v5 01/57] objtool: check: Remove redundant checks on operand type

POP operations are already in code path where destination operand
is OP_DEST_REG. There is no need to check the operand type again.

Signed-off-by: Julien Thierry <jthierry@...hat.com>
---
 tools/objtool/check.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 4768d91c6d68..a04778421144 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1672,15 +1672,13 @@ static int update_insn_state(struct instruction *insn, struct insn_state *state)

 		case OP_SRC_POP:
 		case OP_SRC_POPF:
-			if (!state->drap && op->dest.type == OP_DEST_REG &&
-			    op->dest.reg == cfa->base) {
+			if (!state->drap && op->dest.reg == cfa->base) {

 				/* pop %rbp */
 				cfa->base = CFI_SP;
 			}

 			if (state->drap && cfa->base == CFI_BP_INDIRECT &&
-			    op->dest.type == OP_DEST_REG &&
 			    op->dest.reg == state->drap_reg &&
 			    state->drap_offset == -state->stack_size) {

--
2.21.0