mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 18:29:45 +00:00
d038a7fe67
The loop vectorizer can create this pattern. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228954 91177308-0d34-0410-b5e6-96231b3b80d8
61 lines
1.9 KiB
LLVM
61 lines
1.9 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
|
|
;
|
|
|
|
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
; CHECK-NOT: xor
|
|
|
|
define i32 @test1(i32 %A) {
|
|
%B = xor i32 %A, -1 ; <i32> [#uses=1]
|
|
%C = xor i32 %B, -1 ; <i32> [#uses=1]
|
|
ret i32 %C
|
|
}
|
|
|
|
define i1 @test2(i32 %A, i32 %B) {
|
|
; Can change into setge
|
|
%cond = icmp sle i32 %A, %B ; <i1> [#uses=1]
|
|
%Ret = xor i1 %cond, true ; <i1> [#uses=1]
|
|
ret i1 %Ret
|
|
}
|
|
|
|
; Test that demorgans law can be instcombined
|
|
define i32 @test3(i32 %A, i32 %B) {
|
|
%a = xor i32 %A, -1 ; <i32> [#uses=1]
|
|
%b = xor i32 %B, -1 ; <i32> [#uses=1]
|
|
%c = and i32 %a, %b ; <i32> [#uses=1]
|
|
%d = xor i32 %c, -1 ; <i32> [#uses=1]
|
|
ret i32 %d
|
|
}
|
|
|
|
; Test that demorgens law can work with constants
|
|
define i32 @test4(i32 %A, i32 %B) {
|
|
%a = xor i32 %A, -1 ; <i32> [#uses=1]
|
|
%c = and i32 %a, 5 ; <i32> [#uses=1]
|
|
%d = xor i32 %c, -1 ; <i32> [#uses=1]
|
|
ret i32 %d
|
|
}
|
|
|
|
; test the mirror of demorgans law...
|
|
define i32 @test5(i32 %A, i32 %B) {
|
|
%a = xor i32 %A, -1 ; <i32> [#uses=1]
|
|
%b = xor i32 %B, -1 ; <i32> [#uses=1]
|
|
%c = or i32 %a, %b ; <i32> [#uses=1]
|
|
%d = xor i32 %c, -1 ; <i32> [#uses=1]
|
|
ret i32 %d
|
|
}
|
|
|
|
; PR2298
|
|
define zeroext i8 @test6(i32 %a, i32 %b) nounwind {
|
|
entry:
|
|
%tmp1not = xor i32 %a, -1 ; <i32> [#uses=1]
|
|
%tmp2not = xor i32 %b, -1 ; <i32> [#uses=1]
|
|
%tmp3 = icmp slt i32 %tmp1not, %tmp2not ; <i1> [#uses=1]
|
|
%retval67 = zext i1 %tmp3 to i8 ; <i8> [#uses=1]
|
|
ret i8 %retval67
|
|
}
|
|
|
|
define <2 x i1> @test7(<2 x i32> %A, <2 x i32> %B) {
|
|
%cond = icmp sle <2 x i32> %A, %B
|
|
%Ret = xor <2 x i1> %cond, <i1 true, i1 true>
|
|
ret <2 x i1> %Ret
|
|
}
|