llvm-6502/test/Transforms/InstCombine/select.ll
Chris Lattner 17ce8d22c3 add a new testcase
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21469 91177308-0d34-0410-b5e6-96231b3b80d8
2005-04-23 15:31:03 +00:00

151 lines
3.2 KiB
LLVM

; This test makes sure that these instructions are properly eliminated.
;
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep select
implementation
int %test1(int %A, int %B) {
%C = select bool false, int %A, int %B
ret int %C
}
int %test2(int %A, int %B) {
%C = select bool true, int %A, int %B
ret int %C
}
int %test3(bool %C, int %I) {
%V = select bool %C, int %I, int %I ; V = I
ret int %V
}
bool %test4(bool %C) {
%V = select bool %C, bool true, bool false ; V = C
ret bool %V
}
bool %test5(bool %C) {
%V = select bool %C, bool false, bool true ; V = !C
ret bool %V
}
int %test6(bool %C) {
%V = select bool %C, int 1, int 0 ; V = cast C to int
ret int %V
}
bool %test7(bool %C, bool %X) {
%R = select bool %C, bool true, bool %X ; R = or C, X
ret bool %R
}
bool %test8(bool %C, bool %X) {
%R = select bool %C, bool %X, bool false ; R = and C, X
ret bool %R
}
bool %test9(bool %C, bool %X) {
%R = select bool %C, bool false, bool %X ; R = and !C, X
ret bool %R
}
bool %test10(bool %C, bool %X) {
%R = select bool %C, bool %X, bool true ; R = or !C, X
ret bool %R
}
int %test11(int %a) {
%C = seteq int %a, 0
%R = select bool %C, int 0, int 1
ret int %R
}
int %test12(bool %cond, int %a) {
%b = or int %a, 1
%c = select bool %cond, int %b, int %a
ret int %c
}
int %test12a(bool %cond, int %a) {
%b = shr int %a, ubyte 1
%c = select bool %cond, int %b, int %a
ret int %c
}
int %test12b(bool %cond, int %a) {
%b = shr int %a, ubyte 1
%c = select bool %cond, int %a, int %b
ret int %c
}
int %test13(int %a, int %b) {
%C = seteq int %a, %b
%V = select bool %C, int %a, int %b
ret int %V
}
int %test13a(int %a, int %b) {
%C = setne int %a, %b
%V = select bool %C, int %a, int %b
ret int %V
}
int %test13b(int %a, int %b) {
%C = seteq int %a, %b
%V = select bool %C, int %b, int %a
ret int %V
}
bool %test14a(bool %C, int %X) {
%V = select bool %C, int %X, int 0
%R = setlt int %V, 1 ; (X < 1) | !C
ret bool %R
}
bool %test14b(bool %C, int %X) {
%V = select bool %C, int 0, int %X
%R = setlt int %V, 1 ; (X < 1) | C
ret bool %R
}
int %test15a(int %X) { ;; Code sequence for (X & 16) ? 16 : 0
%t1 = and int %X, 16
%t2 = seteq int %t1, 0
%t3 = select bool %t2, int 0, int 16 ;; X & 16
ret int %t3
}
int %test15b(int %X) { ;; Code sequence for (X & 32) ? 0 : 24
%t1 = and int %X, 32
%t2 = seteq int %t1, 0
%t3 = select bool %t2, int 32, int 0 ;; ~X & 32
ret int %t3
}
int %test15c(int %X) { ;; Alternate code sequence for (X & 16) ? 16 : 0
%t1 = and int %X, 16
%t2 = seteq int %t1, 16
%t3 = select bool %t2, int 16, int 0 ;; X & 16
ret int %t3
}
int %test15d(int %X) { ;; Alternate code sequence for (X & 16) ? 16 : 0
%t1 = and int %X, 16
%t2 = setne int %t1, 0
%t3 = select bool %t2, int 16, int 0 ;; X & 16
ret int %t3
}
int %test16(bool %C, int* %P) {
%P2 = select bool %C, int* %P, int* null
%V = load int* %P2
ret int %V
}
bool %test17(int* %X, bool %C) {
%R = select bool %C, int* %X, int* null
%RV = seteq int* %R, null
ret bool %RV
}