2002-04-18 17:35:39 +00:00
|
|
|
; This test makes sure that add instructions are properly eliminated.
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
|
2007-02-02 02:16:23 +00:00
|
|
|
; RUN: grep -v OK | not grep add
|
2002-04-18 17:35:39 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test1(i32 %A) {
|
|
|
|
%B = add i32 %A, 0 ; <i32> [#uses=1]
|
|
|
|
ret i32 %B
|
2003-02-18 19:43:53 +00:00
|
|
|
}
|
2002-04-18 17:35:39 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test2(i32 %A) {
|
|
|
|
%B = add i32 %A, 5 ; <i32> [#uses=1]
|
|
|
|
%C = add i32 %B, -5 ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-02-18 19:43:53 +00:00
|
|
|
}
|
2002-04-18 17:35:39 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test3(i32 %A) {
|
|
|
|
%B = add i32 %A, 5 ; <i32> [#uses=1]
|
|
|
|
;; This should get converted to an add
|
|
|
|
%C = sub i32 %B, 5 ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-02-18 19:43:53 +00:00
|
|
|
}
|
2002-04-18 17:35:39 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test4(i32 %A, i32 %B) {
|
|
|
|
%C = sub i32 0, %A ; <i32> [#uses=1]
|
|
|
|
; D = B + -A = B - A
|
|
|
|
%D = add i32 %B, %C ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2002-05-06 16:44:53 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test5(i32 %A, i32 %B) {
|
|
|
|
%C = sub i32 0, %A ; <i32> [#uses=1]
|
|
|
|
; D = -A + B = B - A
|
|
|
|
%D = add i32 %C, %B ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2002-05-06 16:44:53 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test6(i32 %A) {
|
|
|
|
%B = mul i32 7, %A ; <i32> [#uses=1]
|
|
|
|
; C = 7*A+A == 8*A == A << 3
|
|
|
|
%C = add i32 %B, %A ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-02-18 19:55:31 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test7(i32 %A) {
|
|
|
|
%B = mul i32 7, %A ; <i32> [#uses=1]
|
|
|
|
; C = A+7*A == 8*A == A << 3
|
|
|
|
%C = add i32 %A, %B ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-02-18 19:55:31 +00:00
|
|
|
}
|
|
|
|
|
2007-02-02 02:16:23 +00:00
|
|
|
; (A & C1)+(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test8(i32 %A, i32 %B) {
|
|
|
|
%A1 = and i32 %A, 7 ; <i32> [#uses=1]
|
|
|
|
%B1 = and i32 %B, 128 ; <i32> [#uses=1]
|
|
|
|
%C = add i32 %A1, %B1 ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-03-10 23:52:54 +00:00
|
|
|
}
|
2003-03-11 00:10:59 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test9(i32 %A) {
|
|
|
|
%B = shl i32 %A, 4 ; <i32> [#uses=2]
|
|
|
|
; === shl int %A, 5
|
|
|
|
%C = add i32 %B, %B ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-07-24 19:44:51 +00:00
|
|
|
}
|
2003-08-13 05:27:57 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i1 @test10(i8 %A, i8 %b) {
|
|
|
|
%B = add i8 %A, %b ; <i8> [#uses=1]
|
|
|
|
; === A != -b
|
|
|
|
%c = icmp ne i8 %B, 0 ; <i1> [#uses=1]
|
|
|
|
ret i1 %c
|
2003-08-13 05:27:57 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i1 @test11(i8 %A) {
|
|
|
|
%B = add i8 %A, -1 ; <i8> [#uses=1]
|
|
|
|
; === A != 1
|
|
|
|
%c = icmp ne i8 %B, 0 ; <i1> [#uses=1]
|
|
|
|
ret i1 %c
|
2003-08-13 05:27:57 +00:00
|
|
|
}
|
2003-08-13 19:01:09 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test12(i32 %A, i32 %B) {
|
|
|
|
; Should be transformed into shl A, 1
|
|
|
|
%C_OK = add i32 %B, %A ; <i32> [#uses=1]
|
|
|
|
br label %X
|
|
|
|
|
|
|
|
X: ; preds = %0
|
|
|
|
%D = add i32 %C_OK, %A ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2003-08-13 19:01:09 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test13(i32 %A, i32 %B, i32 %C) {
|
|
|
|
%D_OK = add i32 %A, %B ; <i32> [#uses=1]
|
|
|
|
%E_OK = add i32 %D_OK, %C ; <i32> [#uses=1]
|
|
|
|
;; shl A, 1
|
|
|
|
%F = add i32 %E_OK, %A ; <i32> [#uses=1]
|
|
|
|
ret i32 %F
|
2003-08-13 19:01:09 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test14(i32 %offset, i32 %difference) {
|
|
|
|
%tmp.2 = and i32 %difference, 3 ; <i32> [#uses=1]
|
|
|
|
%tmp.3_OK = add i32 %tmp.2, %offset ; <i32> [#uses=1]
|
|
|
|
%tmp.5.mask = and i32 %difference, -4 ; <i32> [#uses=1]
|
|
|
|
; == add %offset, %difference
|
|
|
|
%tmp.8 = add i32 %tmp.3_OK, %tmp.5.mask ; <i32> [#uses=1]
|
|
|
|
ret i32 %tmp.8
|
2003-08-13 19:01:09 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i8 @test15(i8 %A) {
|
|
|
|
; Does not effect result
|
|
|
|
%B = add i8 %A, -64 ; <i8> [#uses=1]
|
|
|
|
; Only one bit set
|
|
|
|
%C = and i8 %B, 16 ; <i8> [#uses=1]
|
|
|
|
ret i8 %C
|
2003-09-19 15:33:46 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i8 @test16(i8 %A) {
|
|
|
|
; Turn this into a XOR
|
|
|
|
%B = add i8 %A, 16 ; <i8> [#uses=1]
|
|
|
|
; Only one bit set
|
|
|
|
%C = and i8 %B, 16 ; <i8> [#uses=1]
|
|
|
|
ret i8 %C
|
2003-09-19 15:33:46 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test17(i32 %A) {
|
|
|
|
%B = xor i32 %A, -1 ; <i32> [#uses=1]
|
|
|
|
; == sub int 0, %A
|
|
|
|
%C = add i32 %B, 1 ; <i32> [#uses=1]
|
|
|
|
ret i32 %C
|
2003-10-02 15:11:09 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i8 @test18(i8 %A) {
|
|
|
|
%B = xor i8 %A, -1 ; <i8> [#uses=1]
|
|
|
|
; == sub ubyte 16, %A
|
|
|
|
%C = add i8 %B, 17 ; <i8> [#uses=1]
|
|
|
|
ret i8 %C
|
2003-10-02 15:11:09 +00:00
|
|
|
}
|
2004-04-09 23:47:52 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test19(i1 %C) {
|
|
|
|
%A = select i1 %C, i32 1000, i32 10 ; <i32> [#uses=1]
|
|
|
|
%V = add i32 %A, 123 ; <i32> [#uses=1]
|
|
|
|
ret i32 %V
|
2004-04-09 23:47:52 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test20(i32 %x) {
|
|
|
|
%tmp.2 = xor i32 %x, -2147483648 ; <i32> [#uses=1]
|
2004-04-10 22:01:27 +00:00
|
|
|
;; Add of sign bit -> xor of sign bit.
|
2008-03-09 08:16:40 +00:00
|
|
|
%tmp.4 = add i32 %tmp.2, -2147483648 ; <i32> [#uses=1]
|
|
|
|
ret i32 %tmp.4
|
2004-04-10 22:01:27 +00:00
|
|
|
}
|
2004-04-09 23:47:52 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i1 @test21(i32 %x) {
|
|
|
|
%t = add i32 %x, 4 ; <i32> [#uses=1]
|
|
|
|
%y = icmp eq i32 %t, 123 ; <i1> [#uses=1]
|
|
|
|
ret i1 %y
|
2004-06-27 22:51:19 +00:00
|
|
|
}
|
2004-07-03 00:25:31 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test22(i32 %V) {
|
|
|
|
%V2 = add i32 %V, 10 ; <i32> [#uses=1]
|
|
|
|
switch i32 %V2, label %Default [
|
|
|
|
i32 20, label %Lab1
|
|
|
|
i32 30, label %Lab2
|
|
|
|
]
|
|
|
|
|
|
|
|
Default: ; preds = %0
|
|
|
|
ret i32 123
|
|
|
|
|
|
|
|
Lab1: ; preds = %0
|
|
|
|
ret i32 12312
|
|
|
|
|
|
|
|
Lab2: ; preds = %0
|
|
|
|
ret i32 1231231
|
2004-07-03 00:25:31 +00:00
|
|
|
}
|
2004-09-29 05:06:12 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test23(i1 %C, i32 %a) {
|
2004-09-29 05:06:12 +00:00
|
|
|
entry:
|
2008-03-09 08:16:40 +00:00
|
|
|
br i1 %C, label %endif, label %else
|
2004-09-29 05:06:12 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
else: ; preds = %entry
|
2004-09-29 05:06:12 +00:00
|
|
|
br label %endif
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
endif: ; preds = %else, %entry
|
|
|
|
%b.0 = phi i32 [ 0, %entry ], [ 1, %else ] ; <i32> [#uses=1]
|
|
|
|
%tmp.4 = add i32 %b.0, 1 ; <i32> [#uses=1]
|
|
|
|
ret i32 %tmp.4
|
2004-09-29 05:06:12 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test24(i32 %A) {
|
|
|
|
%B = add i32 %A, 1 ; <i32> [#uses=1]
|
|
|
|
%C = shl i32 %B, 1 ; <i32> [#uses=1]
|
|
|
|
%D = sub i32 %C, 2 ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2004-10-08 03:41:59 +00:00
|
|
|
}
|
2004-11-13 19:49:39 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i64 @test25(i64 %Y) {
|
|
|
|
%tmp.4 = shl i64 %Y, 2 ; <i64> [#uses=1]
|
|
|
|
%tmp.12 = shl i64 %Y, 2 ; <i64> [#uses=1]
|
|
|
|
%tmp.8 = add i64 %tmp.4, %tmp.12 ; <i64> [#uses=1]
|
|
|
|
ret i64 %tmp.8
|
2004-11-13 19:49:39 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test26(i32 %A, i32 %B) {
|
|
|
|
%C = add i32 %A, %B ; <i32> [#uses=1]
|
|
|
|
%D = sub i32 %C, %B ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2005-01-19 21:48:31 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test27(i1 %C, i32 %X, i32 %Y) {
|
|
|
|
%A = add i32 %X, %Y ; <i32> [#uses=1]
|
|
|
|
%B = add i32 %Y, 123 ; <i32> [#uses=1]
|
|
|
|
;; Fold add through select.
|
|
|
|
%C.upgrd.1 = select i1 %C, i32 %A, i32 %B ; <i32> [#uses=1]
|
|
|
|
%D = sub i32 %C.upgrd.1, %Y ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2005-01-19 21:48:31 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test28(i32 %X) {
|
|
|
|
%Y = add i32 %X, 1234 ; <i32> [#uses=1]
|
|
|
|
%Z = sub i32 42, %Y ; <i32> [#uses=1]
|
|
|
|
ret i32 %Z
|
2005-04-07 16:24:59 +00:00
|
|
|
}
|
2005-09-18 04:22:59 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test29(i32 %X, i32 %x) {
|
|
|
|
%tmp.2 = sub i32 %X, %x ; <i32> [#uses=2]
|
|
|
|
%tmp.2.mask = and i32 %tmp.2, 63 ; <i32> [#uses=1]
|
|
|
|
%tmp.6 = add i32 %tmp.2.mask, %x ; <i32> [#uses=1]
|
|
|
|
%tmp.7 = and i32 %tmp.6, 63 ; <i32> [#uses=1]
|
|
|
|
%tmp.9 = and i32 %tmp.2, -64 ; <i32> [#uses=1]
|
|
|
|
%tmp.10 = or i32 %tmp.7, %tmp.9 ; <i32> [#uses=1]
|
|
|
|
ret i32 %tmp.10
|
2005-09-18 04:22:59 +00:00
|
|
|
}
|
2005-11-02 18:34:05 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i64 @test30(i64 %x) {
|
|
|
|
%tmp.2 = xor i64 %x, -9223372036854775808 ; <i64> [#uses=1]
|
2005-11-02 18:34:05 +00:00
|
|
|
;; Add of sign bit -> xor of sign bit.
|
2008-03-09 08:16:40 +00:00
|
|
|
%tmp.4 = add i64 %tmp.2, -9223372036854775808 ; <i64> [#uses=1]
|
|
|
|
ret i64 %tmp.4
|
2005-11-02 18:34:05 +00:00
|
|
|
}
|
2006-03-04 06:02:36 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test31(i32 %A) {
|
|
|
|
%B = add i32 %A, 4 ; <i32> [#uses=1]
|
|
|
|
%C = mul i32 %B, 5 ; <i32> [#uses=1]
|
|
|
|
%D = sub i32 %C, 20 ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2006-03-04 06:02:36 +00:00
|
|
|
}
|
2006-03-05 23:53:04 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test32(i32 %A) {
|
|
|
|
%B = add i32 %A, 4 ; <i32> [#uses=1]
|
|
|
|
%C = shl i32 %B, 2 ; <i32> [#uses=1]
|
|
|
|
%D = sub i32 %C, 16 ; <i32> [#uses=1]
|
|
|
|
ret i32 %D
|
2006-03-05 23:53:04 +00:00
|
|
|
}
|
2006-11-09 05:11:23 +00:00
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i8 @test33(i8 %A) {
|
|
|
|
%B = and i8 %A, -2 ; <i8> [#uses=1]
|
|
|
|
%C = add i8 %B, 1 ; <i8> [#uses=1]
|
|
|
|
ret i8 %C
|
2006-11-09 05:11:23 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i8 @test34(i8 %A) {
|
|
|
|
%B = add i8 %A, 64 ; <i8> [#uses=1]
|
|
|
|
%C = and i8 %B, 12 ; <i8> [#uses=1]
|
|
|
|
ret i8 %C
|
2006-11-09 05:11:23 +00:00
|
|
|
}
|
|
|
|
|
2008-03-09 08:16:40 +00:00
|
|
|
define i32 @test35(i32 %a) {
|
|
|
|
%tmpnot = xor i32 %a, -1 ; <i32> [#uses=1]
|
|
|
|
%tmp2 = add i32 %tmpnot, %a ; <i32> [#uses=1]
|
|
|
|
ret i32 %tmp2
|
2007-01-05 02:16:36 +00:00
|
|
|
}
|
|
|
|
|
2008-03-21 05:19:58 +00:00
|
|
|
define i32 @test36(i32 %a) {
|
|
|
|
%x = and i32 %a, -2
|
|
|
|
%y = and i32 %a, -126
|
|
|
|
%z = add i32 %x, %y
|
|
|
|
%q = and i32 %z, 1 ; always zero
|
|
|
|
ret i32 %q
|
|
|
|
}
|