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60f5ad46c2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124527 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
752 B
LLVM
24 lines
752 B
LLVM
; Duplicate the return into if.end to enable TCE.
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; RUN: opt %s -tailcallelim -stats -disable-output |& grep {Number of return duplicated}
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define i32 @fib(i32 %n) nounwind ssp {
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entry:
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%cmp = icmp slt i32 %n, 2
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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br label %return
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if.end: ; preds = %entry
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%sub = add nsw i32 %n, -2
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%call = call i32 @fib(i32 %sub)
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%sub3 = add nsw i32 %n, -1
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%call4 = call i32 @fib(i32 %sub3)
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%add = add nsw i32 %call, %call4
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br label %return
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return: ; preds = %if.end, %if.then
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%retval.0 = phi i32 [ 1, %if.then ], [ %add, %if.end ]
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ret i32 %retval.0
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}
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