mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-17 18:10:31 +00:00
69ccadd753
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
1.2 KiB
LLVM
69 lines
1.2 KiB
LLVM
; This test makes sure that div instructions are properly eliminated.
|
|
;
|
|
|
|
; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep div
|
|
|
|
implementation
|
|
|
|
int %test1(int %A) {
|
|
%B = div int %A, 1
|
|
ret int %B
|
|
}
|
|
|
|
uint %test2(uint %A) {
|
|
%B = div uint %A, 8 ; => Shift
|
|
ret uint %B
|
|
}
|
|
|
|
int %test3(int %A) {
|
|
%B = div int 0, %A ; => 0, don't need to keep traps
|
|
ret int %B
|
|
}
|
|
|
|
int %test4(int %A) {
|
|
%B = div int %A, -1 ; 0-A
|
|
ret int %B
|
|
}
|
|
|
|
uint %test5(uint %A) {
|
|
%B = div uint %A, 4294967280
|
|
%C = div uint %B, 4294967292
|
|
ret uint %C
|
|
}
|
|
|
|
bool %test6(uint %A) {
|
|
%B = div uint %A, 123
|
|
%C = seteq uint %B, 0 ; A < 123
|
|
ret bool %C
|
|
}
|
|
|
|
bool %test7(uint %A) {
|
|
%B = div uint %A, 10
|
|
%C = seteq uint %B, 2 ; A >= 20 && A < 30
|
|
ret bool %C
|
|
}
|
|
|
|
bool %test8(ubyte %A) {
|
|
%B = div ubyte %A, 123
|
|
%C = seteq ubyte %B, 2 ; A >= 246
|
|
ret bool %C
|
|
}
|
|
|
|
bool %test9(ubyte %A) {
|
|
%B = div ubyte %A, 123
|
|
%C = setne ubyte %B, 2 ; A < 246
|
|
ret bool %C
|
|
}
|
|
|
|
uint %test10(uint %X, bool %C) {
|
|
%V = select bool %C, uint 64, uint 8
|
|
%R = udiv uint %X, %V
|
|
ret uint %R
|
|
}
|
|
|
|
int %test11(int %X, bool %C) {
|
|
%A = select bool %C, int 1024, int 32
|
|
%B = udiv int %X, %A
|
|
ret int %B
|
|
}
|