When a parent is removed from a BB containing one or several phi-nodes, the corresponding phi-sources must be removed from the phi-node. However this is not done and consequentially: * it becomes impossibly to correctly reason about the flow of values through these phi-nodes. * simplifications are missed (e.g. if-conversion). Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx> --- flow.c | 5 +++++ validation/optim/bad-phisrc1.c | 1 - validation/optim/bad-phisrc1a.c | 1 - 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/flow.c b/flow.c index 4952562a373d..69d95a98a512 100644 --- a/flow.c +++ b/flow.c @@ -760,6 +760,11 @@ int convert_to_jump(struct instruction *insn, struct basic_block *target) struct basic_block *child; int changed = REPEAT_CSE; + switch (insn->opcode) { + case OP_CBR: + changed |= remove_phisources(insn->bb, insn->bb_true == target ? insn->bb_false : insn->bb_true); + break; + } kill_use(&insn->cond); insn->bb_true = target; insn->bb_false = NULL; diff --git a/validation/optim/bad-phisrc1.c b/validation/optim/bad-phisrc1.c index 59c5e4f1e66a..aa12dd0ae542 100644 --- a/validation/optim/bad-phisrc1.c +++ b/validation/optim/bad-phisrc1.c @@ -8,7 +8,6 @@ void foo(int a, int b) /* * check-name: bad-phisrc1 * check-command: test-linearize -Wno-decl $file - * check-known-to-fail * * check-output-ignore * check-output-excludes: phi\\. diff --git a/validation/optim/bad-phisrc1a.c b/validation/optim/bad-phisrc1a.c index cf07573b1fd3..b7519ee7cf5d 100644 --- a/validation/optim/bad-phisrc1a.c +++ b/validation/optim/bad-phisrc1a.c @@ -16,7 +16,6 @@ out: /* * check-name: bad-phisrc1a * check-command: test-linearize -Wno-decl $file - * check-known-to-fail * * check-output-ignore * check-output-contains: select\\. -- 2.31.0