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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2565 91177308-0d34-0410-b5e6-96231b3b80d8
38 lines
664 B
LLVM
38 lines
664 B
LLVM
; This test makes sure that these instructions are properly eliminated.
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;
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; RUN: if as < %s | opt -instcombine -dce | dis | grep sub | grep -v 'sub int %Cok, %Bok'
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; RUN: then exit 1
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; RUN: else exit 0
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; RUN: fi
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implementation
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int "test1"(int %A) {
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%B = sub int %A, %A ; ISA constant 0
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ret int %B
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}
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int "test2"(int %A) {
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%B = sub int %A, 0
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ret int %B
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}
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int "test3"(int %A) {
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%B = sub int 0, %A ; B = -A
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%C = sub int 0, %B ; C = -B = A
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ret int %C
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}
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int "test4"(int %A, int %x) {
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%B = sub int 0, %A
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%C = sub int %x, %B
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ret int %C
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}
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int "test5"(int %A, int %Bok, int %Cok) {
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%D = sub int %Bok, %Cok
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%E = sub int %A, %D
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ret int %E
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}
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