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New testcase

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llvm-svn: 8617
This commit is contained in:
Chris Lattner 2003-09-20 05:02:54 +00:00
parent dc73981ba4
commit 065c175578
1 changed files with 29 additions and 0 deletions
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29
test/Regression/Transforms/TailCallElim/ackermann.ll Normal file
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; This function contains two tail calls, which should be eliminated
; RUN: llvm-as < %s | opt -tailcallelim -stats -disable-output 2>&1 | grep '2 tailcallelim'
int %Ack(int %M.1, int %N.1) {
entry:
%tmp.1 = seteq int %M.1, 0 ; <bool> [#uses=1]
br bool %tmp.1, label %then.0, label %endif.0
then.0:
%tmp.4 = add int %N.1, 1 ; <int> [#uses=1]
ret int %tmp.4
endif.0:
%tmp.6 = seteq int %N.1, 0 ; <bool> [#uses=1]
br bool %tmp.6, label %then.1, label %endif.1
then.1:
%tmp.10 = add int %M.1, -1 ; <int> [#uses=1]
%tmp.8 = call int %Ack( int %tmp.10, int 1 ) ; <int> [#uses=1]
ret int %tmp.8
endif.1:
%tmp.13 = add int %M.1, -1 ; <int> [#uses=1]
%tmp.17 = add int %N.1, -1 ; <int> [#uses=1]
%tmp.14 = call int %Ack( int %M.1, int %tmp.17 ) ; <int> [#uses=1]
%tmp.11 = call int %Ack( int %tmp.13, int %tmp.14 ) ; <int> [#uses=1]
ret int %tmp.11
}