mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 08:23:21 +01:00
c95df8b6d8
llvm-svn: 81257
85 lines
2.0 KiB
LLVM
85 lines
2.0 KiB
LLVM
; This test makes sure that div instructions are properly eliminated.
|
|
|
|
; RUN: opt < %s -instcombine -S | not grep div
|
|
|
|
define i32 @test1(i32 %A) {
|
|
%B = sdiv i32 %A, 1 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test2(i32 %A) {
|
|
; => Shift
|
|
%B = udiv i32 %A, 8 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test3(i32 %A) {
|
|
; => 0, don't need to keep traps
|
|
%B = sdiv i32 0, %A ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test4(i32 %A) {
|
|
; 0-A
|
|
%B = sdiv i32 %A, -1 ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
define i32 @test5(i32 %A) {
|
|
%B = udiv i32 %A, -16 ; <i32> [#uses=1]
|
|
%C = udiv i32 %B, -4 ; <i32> [#uses=1]
|
|
ret i32 %C
|
|
}
|
|
|
|
define i1 @test6(i32 %A) {
|
|
%B = udiv i32 %A, 123 ; <i32> [#uses=1]
|
|
; A < 123
|
|
%C = icmp eq i32 %B, 0 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test7(i32 %A) {
|
|
%B = udiv i32 %A, 10 ; <i32> [#uses=1]
|
|
; A >= 20 && A < 30
|
|
%C = icmp eq i32 %B, 2 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test8(i8 %A) {
|
|
%B = udiv i8 %A, 123 ; <i8> [#uses=1]
|
|
; A >= 246
|
|
%C = icmp eq i8 %B, 2 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i1 @test9(i8 %A) {
|
|
%B = udiv i8 %A, 123 ; <i8> [#uses=1]
|
|
; A < 246
|
|
%C = icmp ne i8 %B, 2 ; <i1> [#uses=1]
|
|
ret i1 %C
|
|
}
|
|
|
|
define i32 @test10(i32 %X, i1 %C) {
|
|
%V = select i1 %C, i32 64, i32 8 ; <i32> [#uses=1]
|
|
%R = udiv i32 %X, %V ; <i32> [#uses=1]
|
|
ret i32 %R
|
|
}
|
|
|
|
define i32 @test11(i32 %X, i1 %C) {
|
|
%A = select i1 %C, i32 1024, i32 32 ; <i32> [#uses=1]
|
|
%B = udiv i32 %X, %A ; <i32> [#uses=1]
|
|
ret i32 %B
|
|
}
|
|
|
|
; PR2328
|
|
define i32 @test12(i32 %x) nounwind {
|
|
%tmp3 = udiv i32 %x, %x ; 1
|
|
ret i32 %tmp3
|
|
}
|
|
|
|
define i32 @test13(i32 %x) nounwind {
|
|
%tmp3 = sdiv i32 %x, %x ; 1
|
|
ret i32 %tmp3
|
|
}
|
|
|