http://llvm.org/bugs/show_bug.cgi?id=2876
Summary: simplifycfg won't simplify switch to identical blocks
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [email protected]
Given a branch where the two target blocks are identical ("ret i32 %b" in
both), simplifycfg will simplify them away. But not so for a switch statement:
define i32 @f(i32 %a, i32 %b) nounwind readnone {
entry:
switch i32 %a, label %bb3 [
i32 4, label %bb
i32 6, label %bb
]
bb: ; preds = %entry, %entry
ret i32 %b
bb3: ; preds = %entry
ret i32 %b
}
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