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Add a testcase for my recent InstCombine fix, written by Nicholas. 

llvm-svn: 45386
This commit is contained in:
Owen Anderson 2007-12-28 21:08:43 +00:00
parent 7363914ef7
commit 3de3f9981e
1 changed files with 89 additions and 0 deletions
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89
llvm/test/Transforms/InstCombine/2007-12-28-IcmpSub2.ll Normal file
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; RUN: llvm-as < %s | opt -mem2reg -instcombine | llvm-dis | grep "ret i32 1" | count 8
define i32 @test1() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp ule i32 %sub, 0
%retval = select i1 %cmp, i32 0, i32 1
ret i32 %retval
}
define i32 @test2() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp ugt i32 %sub, 0
%retval = select i1 %cmp, i32 1, i32 0
ret i32 %retval
}
define i32 @test3() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp slt i32 %sub, 0
%retval = select i1 %cmp, i32 1, i32 0
ret i32 %retval
}
define i32 @test4() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp sle i32 %sub, 0
%retval = select i1 %cmp, i32 1, i32 0
ret i32 %retval
}
define i32 @test5() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp sge i32 %sub, 0
%retval = select i1 %cmp, i32 0, i32 1
ret i32 %retval
}
define i32 @test6() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp sgt i32 %sub, 0
%retval = select i1 %cmp, i32 0, i32 1
ret i32 %retval
}
define i32 @test7() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp eq i32 %sub, 0
%retval = select i1 %cmp, i32 0, i32 1
ret i32 %retval
}
define i32 @test8() {
entry:
%z = alloca i32
store i32 0, i32* %z
%tmp = load i32* %z
%sub = sub i32 %tmp, 1
%cmp = icmp ne i32 %sub, 0
%retval = select i1 %cmp, i32 1, i32 0
ret i32 %retval
}