http://llvm.org/bugs/show_bug.cgi?id=21576
Bug ID: 21576
Summary: Infinite loop in opt -instcombine
Product: tools
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: opt
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
$ cat bugpoint-reduced-simplified.ll
define void @autogen_SD2047654124() {
BB:
%A = alloca <1 x double>
%L = load <1 x double>* %A
%B = frem <1 x double> %L, %L
br label %CF33
CF33: ; preds = %CF33, %BB
br i1 undef, label %CF33, label %CF34
CF34: ; preds = %CF34, %CF33
%Tr = fptrunc <1 x double> %B to <1 x float>
%E13 = extractelement <1 x float> %Tr, i32 0
br i1 undef, label %CF34, label %CF35
CF35: ; preds = %CF34
%B29 = fdiv float 0xC08DAF2180000000, %E13
ret void
}
$ opt -instcombine bugpoint-reduced-simplified.ll -o out.ll
Gets stuck in infinite loop using ever-increasing amounts of memory.
Reproduced with trunk 222002.
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