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103e1a3118
(icmp slt (sub A B) 1) -> (icmp sle A B) icmp sgt (sub A B) -1) -> (icmp sge A B) and add testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45256 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
683 B
LLVM
25 lines
683 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {sub}
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define i32 @foo(i32 %a) {
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entry:
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%tmp2 = sub i32 99, %a ; <i32> [#uses=1]
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%tmp3 = icmp sgt i32 %tmp2, -1 ; <i1> [#uses=1]
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%retval = select i1 %tmp3, i32 %a, i32 0 ; <i32> [#uses=1]
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ret i32 %retval
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}
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define i32 @bar(i32 %a) {
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entry:
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%tmp2 = sub i32 99, %a ; <i32> [#uses=1]
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%tmp3 = icmp sge i32 %tmp2, 0; <i1> [#uses=1]
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%retval = select i1 %tmp3, i32 %a, i32 0 ; <i32> [#uses=1]
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ret i32 %retval
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}
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define i32 @baz(i32 %a) {
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entry:
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%tmp2 = sub i32 99, %a ; <i32> [#uses=1]
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%tmp3 = icmp slt i32 %tmp2, 1 ; <i1> [#uses=1]
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%retval = select i1 %tmp3, i32 %a, i32 0 ; <i32> [#uses=1]
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ret i32 %retval
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} |