llvm-project/llvm/test/Transforms/Reassociate/inverses.ll

47 lines
1.1 KiB
LLVM
Raw Normal View History

2010-01-19 05:58:32 +08:00
; RUN: opt < %s -reassociate -die -S | FileCheck %s
2005-05-09 02:54:40 +08:00
define i32 @test1(i32 %a, i32 %b) {
2010-01-19 05:58:32 +08:00
%tmp.2 = and i32 %b, %a
%tmp.4 = xor i32 %a, -1
; (A&B)&~A == 0
2010-01-19 05:58:32 +08:00
%tmp.5 = and i32 %tmp.2, %tmp.4
ret i32 %tmp.5
; CHECK-LABEL: @test1(
2010-01-19 05:58:32 +08:00
; CHECK: ret i32 0
2005-05-09 02:54:40 +08:00
}
define i32 @test2(i32 %a, i32 %b) {
2010-01-19 05:58:32 +08:00
%tmp.1 = and i32 %a, 1234
%tmp.2 = and i32 %b, %tmp.1
%tmp.4 = xor i32 %a, -1
; A&~A == 0
2010-01-19 05:58:32 +08:00
%tmp.5 = and i32 %tmp.2, %tmp.4
ret i32 %tmp.5
; CHECK-LABEL: @test2(
2010-01-19 05:58:32 +08:00
; CHECK: ret i32 0
2005-05-09 02:54:40 +08:00
}
define i32 @test3(i32 %b, i32 %a) {
2010-01-19 05:58:32 +08:00
%tmp.1 = add i32 %a, 1234
%tmp.2 = add i32 %b, %tmp.1
%tmp.4 = sub i32 0, %a
; (b+(a+1234))+-a -> b+1234
2010-01-19 05:58:32 +08:00
%tmp.5 = add i32 %tmp.2, %tmp.4
ret i32 %tmp.5
; CHECK-LABEL: @test3(
2010-01-19 05:58:32 +08:00
; CHECK: %tmp.5 = add i32 %b, 1234
; CHECK: ret i32 %tmp.5
2005-05-09 02:54:40 +08:00
}
define i32 @test4(i32 %b, i32 %a) {
%tmp.1 = add i32 %a, 1234
%tmp.2 = add i32 %b, %tmp.1
%tmp.4 = xor i32 %a, -1
; (b+(a+1234))+~a -> b+1233
%tmp.5 = add i32 %tmp.2, %tmp.4
ret i32 %tmp.5
; CHECK-LABEL: @test4(
; CHECK: %tmp.5 = add i32 %b, 1233
; CHECK: ret i32 %tmp.5
}