From: Brandt Bucher <brandt@python.org>
Date: Thu, 3 Feb 2022 10:14:44 +0000 (-0800)
Subject: bpo-45773: Remove invalid peephole optimizations (GH-31066)
X-Git-Tag: v3.11.0a5~5
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0433c1e70254d4d0357a9e14596929a04bdf769;p=thirdparty%2FPython%2Fcpython.git

bpo-45773: Remove invalid peephole optimizations (GH-31066)
---

diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-02-01-14-30-56.bpo-45773.Up77LD.rst b/Misc/NEWS.d/next/Core and Builtins/2022-02-01-14-30-56.bpo-45773.Up77LD.rst
new file mode 100644
index 000000000000..45da5116fc94
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2022-02-01-14-30-56.bpo-45773.Up77LD.rst	
@@ -0,0 +1 @@
+Remove two invalid "peephole" optimizations from the bytecode compiler.
diff --git a/Python/compile.c b/Python/compile.c
index 1d2d567e85e9..cecd6a5c4266 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -8757,7 +8757,6 @@ optimize_basic_block(struct compiler *c, basicblock *bb, PyObject *consts)
                 switch (target->i_opcode) {
                     case JUMP_ABSOLUTE:
                     case JUMP_FORWARD:
-                    case JUMP_IF_FALSE_OR_POP:
                         i -= jump_thread(inst, target, POP_JUMP_IF_FALSE);
                 }
                 break;
@@ -8765,7 +8764,6 @@ optimize_basic_block(struct compiler *c, basicblock *bb, PyObject *consts)
                 switch (target->i_opcode) {
                     case JUMP_ABSOLUTE:
                     case JUMP_FORWARD:
-                    case JUMP_IF_TRUE_OR_POP:
                         i -= jump_thread(inst, target, POP_JUMP_IF_TRUE);
                 }
                 break;