mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
7c65d4345e
Make use of the END. facility on all files > 1K so that we aren't wasting CPU cycles searching for RUN: lines that we'll never find. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36059 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
1.7 KiB
LLVM
79 lines
1.7 KiB
LLVM
; This test makes sure that these instructions are properly eliminated.
|
|
;
|
|
; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | not grep phi
|
|
; END.
|
|
|
|
implementation
|
|
|
|
int %test1(int %A, bool %b) {
|
|
BB0: br bool %b, label %BB1, label %BB2
|
|
BB1:
|
|
%B = phi int [%A, %BB0] ; Combine away one argument PHI nodes
|
|
ret int %B
|
|
BB2:
|
|
ret int %A
|
|
}
|
|
|
|
int %test2(int %A, bool %b) {
|
|
BB0: br bool %b, label %BB1, label %BB2
|
|
BB1:
|
|
br label %BB2
|
|
BB2:
|
|
%B = phi int [%A, %BB0], [%A, %BB1] ; Combine away PHI nodes with same values
|
|
ret int %B
|
|
}
|
|
|
|
int %test3(int %A, bool %b) {
|
|
BB0: br label %Loop
|
|
|
|
Loop:
|
|
%B = phi int [%A, %BB0], [%B, %Loop] ; PHI has same value always.
|
|
br bool %b, label %Loop, label %Exit
|
|
Exit:
|
|
ret int %B
|
|
}
|
|
|
|
int %test4(bool %b) {
|
|
BB0: ret int 7 ; Loop is unreachable
|
|
|
|
Loop:
|
|
%B = phi int [%B, %L2], [%B, %Loop] ; PHI has same value always.
|
|
br bool %b, label %L2, label %Loop
|
|
L2:
|
|
br label %Loop
|
|
}
|
|
|
|
int %test5(int %A, bool %b) {
|
|
BB0: br label %Loop
|
|
|
|
Loop:
|
|
%B = phi int [%A, %BB0], [undef, %Loop] ; PHI has same value always.
|
|
br bool %b, label %Loop, label %Exit
|
|
Exit:
|
|
ret int %B
|
|
}
|
|
|
|
uint %test6(int %A, bool %b) {
|
|
BB0:
|
|
%X = cast int %A to uint
|
|
br bool %b, label %BB1, label %BB2
|
|
BB1:
|
|
%Y = cast int %A to uint
|
|
br label %BB2
|
|
BB2:
|
|
%B = phi uint [%X, %BB0], [%Y, %BB1] ;; Suck casts into phi
|
|
ret uint %B
|
|
}
|
|
|
|
int %test7(int %A, bool %b) {
|
|
BB0: br label %Loop
|
|
|
|
Loop:
|
|
%B = phi int [%A, %BB0], [%C, %Loop] ; PHI is dead.
|
|
%C = add int %B, 123
|
|
br bool %b, label %Loop, label %Exit
|
|
Exit:
|
|
ret int 0
|
|
}
|
|
|