2002-05-06 05:51:26 +00:00
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; This test makes sure that these instructions are properly eliminated.
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;
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2007-01-02 05:55:05 +00:00
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; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \
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2007-04-14 20:13:02 +00:00
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; RUN: grep -v {sub i32 %Cok, %Bok} | not grep sub
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2002-05-06 05:51:26 +00:00
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implementation
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2003-02-18 19:43:21 +00:00
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int %test1(int %A) {
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2002-05-06 05:51:26 +00:00
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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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2003-02-18 19:43:21 +00:00
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int %test2(int %A) {
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2002-05-06 05:51:26 +00:00
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%B = sub int %A, 0
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ret int %B
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}
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2003-02-18 19:43:21 +00:00
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int %test3(int %A) {
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2002-05-06 16:19:16 +00:00
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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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2002-05-08 23:15:01 +00:00
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2003-02-18 19:43:21 +00:00
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int %test4(int %A, int %x) {
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2002-05-08 23:15:01 +00:00
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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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2003-02-18 19:43:21 +00:00
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int %test5(int %A, int %Bok, int %Cok) {
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2002-05-09 01:28:30 +00:00
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%D = sub int %Bok, %Cok
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2002-05-08 23:15:01 +00:00
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%E = sub int %A, %D
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ret int %E
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}
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2003-02-18 19:28:47 +00:00
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int %test6(int %A, int %B) {
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%C = and int %A, %B ; A - (A & B) => A & ~B
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%D = sub int %A, %C
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ret int %D
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}
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int %test7(int %A) {
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%B = sub int -1, %A ; B = ~A
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ret int %B
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}
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2003-02-18 19:55:31 +00:00
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int %test8(int %A) {
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%B = mul int 9, %A
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%C = sub int %B, %A ; C = 9*A-A == A*8 == A << 3
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ret int %C
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}
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int %test9(int %A) {
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%B = mul int 3, %A
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%C = sub int %A, %B ; C = A-3*A == A*-2
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ret int %C
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}
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2003-03-10 23:22:50 +00:00
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int %test10(int %A, int %B) { ; -A*-B == A*B
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%C = sub int 0, %A
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%D = sub int 0, %B
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%E = mul int %C, %D
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ret int %E
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}
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int %test10(int %A) { ; -A *c1 == A * -c1
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%C = sub int 0, %A
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%E = mul int %C, 7
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ret int %E
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}
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2003-08-13 05:27:57 +00:00
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bool %test11(ubyte %A, ubyte %B) {
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%C = sub ubyte %A, %B
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%cD = setne ubyte %C, 0 ; == setne A, B
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ret bool %cD
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}
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2004-03-12 23:52:51 +00:00
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int %test12(int %A) {
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%B = shr int %A, ubyte 31
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%C = sub int 0, %B ; == ushr A, 31
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ret int %C
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}
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uint %test13(uint %A) {
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%B = shr uint %A, ubyte 31
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%C = sub uint 0, %B ; == sar A, 31
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ret uint %C
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}
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2004-03-13 00:11:38 +00:00
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int %test14(uint %A) {
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%B = shr uint %A, ubyte 31
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%C = cast uint %B to int
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%D = sub int 0, %C
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ret int %D
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}
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2004-07-06 07:00:11 +00:00
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int %test15(int %A, int %B) {
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%C = sub int 0, %A
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%D = rem int %B, %C ;; X % -Y === X % Y
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ret int %D
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}
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2004-10-06 15:07:56 +00:00
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int %test16(int %A) {
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%X = div int %A, 1123
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%Y = sub int 0, %X
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ret int %Y
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}
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2004-10-09 02:50:01 +00:00
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int %test17(int %A) {
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%B = sub int 0, %A
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%C = div int %B, 1234
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ret int %C
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}
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2004-11-13 19:49:39 +00:00
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long %test18(long %Y) {
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%tmp.4 = shl long %Y, ubyte 2
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%tmp.12 = shl long %Y, ubyte 2
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%tmp.8 = sub long %tmp.4, %tmp.12 ;; 0
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ret long %tmp.8
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}
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2005-04-07 16:41:45 +00:00
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int %test19(int %X, int %Y) {
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%Z = sub int %X, %Y
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%Q = add int %Z, %Y
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ret int %Q
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}
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2006-02-27 01:43:02 +00:00
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bool %test20(int %g, int %h) {
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%tmp.2 = sub int %g, %h
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%tmp.4 = setne int %tmp.2, %g
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ret bool %tmp.4
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}
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bool %test21(int %g, int %h) {
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%tmp.2 = sub int %g, %h
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%tmp.4 = setne int %tmp.2, %g
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ret bool %tmp.4
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}
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