mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
69ccadd753
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
91 lines
2.3 KiB
Plaintext
91 lines
2.3 KiB
Plaintext
; These tests ensure that we can compute the trip count of various forms of
|
|
; loops. If the trip count of the loop is computable, then we will know what
|
|
; the exit value of the loop will be for some value, allowing us to substitute
|
|
; it directly into users outside of the loop, making the loop dead.
|
|
;
|
|
; RUN: llvm-upgrade < %s | llvm-as | opt -indvars -adce -simplifycfg | llvm-dis | not grep br
|
|
|
|
int %linear_setne() { ;; for (i = 0; i != 100; ++i)
|
|
entry:
|
|
br label %loop
|
|
loop:
|
|
%i = phi int [ 0, %entry ], [ %i.next, %loop ]
|
|
%i.next = add int %i, 1
|
|
%c = setne int %i, 100
|
|
br bool %c, label %loop, label %loopexit
|
|
loopexit:
|
|
ret int %i
|
|
}
|
|
|
|
int %linear_setne_2() { ;; for (i = 0; i != 100; i += 2)
|
|
entry:
|
|
br label %loop
|
|
loop:
|
|
%i = phi int [ 0, %entry ], [ %i.next, %loop ]
|
|
%i.next = add int %i, 2
|
|
%c = setne int %i, 100
|
|
br bool %c, label %loop, label %loopexit
|
|
loopexit:
|
|
ret int %i
|
|
}
|
|
|
|
|
|
int %linear_setne_overflow() { ;; for (i = 1024; i != 0; i += 1024)
|
|
entry:
|
|
br label %loop
|
|
loop:
|
|
%i = phi int [ 1024, %entry ], [ %i.next, %loop ]
|
|
%i.next = add int %i, 1024
|
|
%c = setne int %i, 0
|
|
br bool %c, label %loop, label %loopexit
|
|
loopexit:
|
|
ret int %i
|
|
}
|
|
|
|
int %linear_setlt() { ;; for (i = 0; i < 100; ++i)
|
|
entry:
|
|
br label %loop
|
|
loop:
|
|
%i = phi int [ 0, %entry ], [ %i.next, %loop ]
|
|
%i.next = add int %i, 1
|
|
%c = setlt int %i, 100
|
|
br bool %c, label %loop, label %loopexit
|
|
loopexit:
|
|
ret int %i
|
|
}
|
|
|
|
int %quadratic_setlt() { ;; for (i = 7; i*i < 1000; i+=3)
|
|
entry:
|
|
br label %loop
|
|
loop:
|
|
%i = phi int [ 7, %entry ], [ %i.next, %loop ]
|
|
%i.next = add int %i, 3
|
|
%i2 = mul int %i, %i
|
|
%c = setlt int %i2, 1000
|
|
br bool %c, label %loop, label %loopexit
|
|
loopexit:
|
|
ret int %i
|
|
}
|
|
|
|
;; Chained loop test - The exit value of the second loop depends on the exit
|
|
;; value of the first being computed.
|
|
int %chained() {
|
|
entry:
|
|
br label %loop
|
|
loop: ;; for (i = 0; i != 100; ++i)
|
|
%i = phi int [ 0, %entry ], [ %i.next, %loop ]
|
|
%i.next = add int %i, 1
|
|
%c = setne int %i, 100
|
|
br bool %c, label %loop, label %loopexit
|
|
loopexit:
|
|
br label %loop2
|
|
loop2: ;; for (j = i; j != 200; ++j)
|
|
%j = phi int [ %i, %loopexit ], [ %j.next, %loop2 ]
|
|
%j.next = add int %j, 1
|
|
%c2 = setne int %j, 200
|
|
br bool %c2, label %loop2, label %loopexit2
|
|
loopexit2:
|
|
ret int %j
|
|
}
|
|
|