mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
69ccadd753
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
1.4 KiB
LLVM
75 lines
1.4 KiB
LLVM
; This test makes sure that mul instructions are properly eliminated.
|
|
;
|
|
|
|
; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep mul
|
|
|
|
implementation
|
|
|
|
int %test1(int %A) {
|
|
%B = mul int %A, 1
|
|
ret int %B
|
|
}
|
|
|
|
int %test2(int %A) {
|
|
%B = mul int %A, 2 ; Should convert to an add instruction
|
|
ret int %B
|
|
}
|
|
|
|
int %test3(int %A) {
|
|
%B = mul int %A, 0 ; This should disappear entirely
|
|
ret int %B
|
|
}
|
|
|
|
double %test4(double %A) {
|
|
%B = mul double 1.0, %A ; This is safe for FP
|
|
ret double %B
|
|
}
|
|
|
|
int %test5(int %A) {
|
|
%B = mul int %A, 8
|
|
ret int %B
|
|
}
|
|
|
|
ubyte %test6(ubyte %A) {
|
|
%B = mul ubyte %A, 8
|
|
%C = mul ubyte %B, 8
|
|
ret ubyte %C
|
|
}
|
|
|
|
int %test7(int %i) {
|
|
%tmp = mul int %i, -1 ; %tmp = sub 0, %i
|
|
ret int %tmp
|
|
}
|
|
|
|
ulong %test8(ulong %i) {
|
|
%j = mul ulong %i, 18446744073709551615 ; tmp = sub 0, %i
|
|
ret ulong %j
|
|
}
|
|
|
|
uint %test9(uint %i) {
|
|
%j = mul uint %i, 4294967295 ; %j = sub 0, %i
|
|
ret uint %j
|
|
}
|
|
|
|
uint %test10(int %a, uint %b) {
|
|
%c = setlt int %a, 0
|
|
%d = cast bool %c to uint
|
|
%e = mul uint %d, %b ; e = b & (a >> 31)
|
|
ret uint %e
|
|
}
|
|
|
|
uint %test11(int %a, uint %b) {
|
|
%c = setle int %a, -1
|
|
%d = cast bool %c to uint
|
|
%e = mul uint %d, %b ; e = b & (a >> 31)
|
|
ret uint %e
|
|
}
|
|
|
|
uint %test11(ubyte %a, uint %b) {
|
|
%c = setgt ubyte %a, 127
|
|
%d = cast bool %c to uint
|
|
%e = mul uint %d, %b ; e = b & (a >> 31)
|
|
ret uint %e
|
|
}
|
|
|