https://llvm.org/bugs/show_bug.cgi?id=31613
Bug ID: 31613
Summary: NewGVN asserts, "instruction processed too many times"
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: dav...@freebsd.org
CC: dber...@dberlin.org, llvm-bugs@lists.llvm.org
Blocks: 30995
Classification: Unclassified
Reduced from one of our games (game7, for the archives).
define void @patatino() {
entry:
br label %while.body
while.body: ; preds =
%while.end129.loopexit, %entry
%foo.0237 = phi i32 [ 0, %entry ], [ -1, %while.end129.loopexit ]
br label %while.cond22.outer
while.cond22.outer: ; preds = %while.cond38,
%while.body
%foo.1.ph211 = phi i32 [ %foo.0237, %while.body ], [ %foo.2, %while.cond38 ]
br label %while.cond22.outer212
while.cond22.outer212: ; preds = %if.else,
%while.cond22.outer
%foo.1.ph214 = phi i32 [ %foo.1.ph211, %while.cond22.outer ], [
%foo.2.lcssa253, %if.else ]
br i1 undef, label %while.end129.loopexit, label %if.end31.us
if.end31.us: ; preds =
%while.cond22.outer212
br label %while.body37
while.body37: ; preds = %cleanup,
%if.end31.us
%foo.2 = phi i32 [ %foo.4, %cleanup ], [ %foo.1.ph214, %if.end31.us ]
br label %while.cond38
while.cond38: ; preds = %land.rhs47,
%while.body37
switch i8 undef, label %land.rhs47 [
i8 0, label %while.cond22.outer
i8 10, label %lor.lhs.false
]
land.rhs47: ; preds = %while.cond38
br label %while.cond38
lor.lhs.false: ; preds = %while.cond38
br i1 undef, label %if.then70, label %if.else
if.then70: ; preds = %lor.lhs.false
br i1 undef, label %if.then77, label %cleanup
if.then77: ; preds = %if.then70
br label %cleanup
if.else: ; preds = %lor.lhs.false
%foo.2.lcssa253 = phi i32 [ %foo.2, %lor.lhs.false ]
br label %while.cond22.outer212
cleanup: ; preds = %if.then77,
%if.then70
%foo.4 = phi i32 [ undef, %if.then77 ], [ %foo.2, %if.then70 ]
br label %while.body37
while.end129.loopexit: ; preds =
%while.cond22.outer212
br label %while.body
}
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