mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-04 22:07:27 +00:00
74786c0f43
the name used in the code that these tests are for. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64624 91177308-0d34-0410-b5e6-96231b3b80d8
115 lines
2.9 KiB
LLVM
115 lines
2.9 KiB
LLVM
; Test that we can evaluate the exit values of various expression types. Since
|
|
; these loops all have predictable exit values we can replace the use outside
|
|
; of the loop with a closed-form computation, making the loop dead.
|
|
;
|
|
; RUN: llvm-as < %s | opt -indvars -loop-deletion -simplifycfg | \
|
|
; RUN: llvm-dis | not grep br
|
|
|
|
define i32 @polynomial_constant() {
|
|
; <label>:0
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%A1 = phi i32 [ 0, %0 ], [ %A2, %Loop ] ; <i32> [#uses=3]
|
|
%B1 = phi i32 [ 0, %0 ], [ %B2, %Loop ] ; <i32> [#uses=1]
|
|
%A2 = add i32 %A1, 1 ; <i32> [#uses=1]
|
|
%B2 = add i32 %B1, %A1 ; <i32> [#uses=2]
|
|
%C = icmp eq i32 %A1, 1000 ; <i1> [#uses=1]
|
|
br i1 %C, label %Out, label %Loop
|
|
|
|
Out: ; preds = %Loop
|
|
ret i32 %B2
|
|
}
|
|
|
|
define i32 @NSquare(i32 %N) {
|
|
; <label>:0
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%X = phi i32 [ 0, %0 ], [ %X2, %Loop ] ; <i32> [#uses=4]
|
|
%X2 = add i32 %X, 1 ; <i32> [#uses=1]
|
|
%c = icmp eq i32 %X, %N ; <i1> [#uses=1]
|
|
br i1 %c, label %Out, label %Loop
|
|
|
|
Out: ; preds = %Loop
|
|
%Y = mul i32 %X, %X ; <i32> [#uses=1]
|
|
ret i32 %Y
|
|
}
|
|
|
|
define i32 @NSquareOver2(i32 %N) {
|
|
; <label>:0
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%X = phi i32 [ 0, %0 ], [ %X2, %Loop ] ; <i32> [#uses=3]
|
|
%Y = phi i32 [ 15, %0 ], [ %Y2, %Loop ] ; <i32> [#uses=1]
|
|
%Y2 = add i32 %Y, %X ; <i32> [#uses=2]
|
|
%X2 = add i32 %X, 1 ; <i32> [#uses=1]
|
|
%c = icmp eq i32 %X, %N ; <i1> [#uses=1]
|
|
br i1 %c, label %Out, label %Loop
|
|
|
|
Out: ; preds = %Loop
|
|
ret i32 %Y2
|
|
}
|
|
|
|
define i32 @strength_reduced() {
|
|
; <label>:0
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%A1 = phi i32 [ 0, %0 ], [ %A2, %Loop ] ; <i32> [#uses=3]
|
|
%B1 = phi i32 [ 0, %0 ], [ %B2, %Loop ] ; <i32> [#uses=1]
|
|
%A2 = add i32 %A1, 1 ; <i32> [#uses=1]
|
|
%B2 = add i32 %B1, %A1 ; <i32> [#uses=2]
|
|
%C = icmp eq i32 %A1, 1000 ; <i1> [#uses=1]
|
|
br i1 %C, label %Out, label %Loop
|
|
|
|
Out: ; preds = %Loop
|
|
ret i32 %B2
|
|
}
|
|
|
|
define i32 @chrec_equals() {
|
|
entry:
|
|
br label %no_exit
|
|
|
|
no_exit: ; preds = %no_exit, %entry
|
|
%i0 = phi i32 [ 0, %entry ], [ %i1, %no_exit ] ; <i32> [#uses=3]
|
|
%ISq = mul i32 %i0, %i0 ; <i32> [#uses=1]
|
|
%i1 = add i32 %i0, 1 ; <i32> [#uses=2]
|
|
%tmp.1 = icmp ne i32 %ISq, 10000 ; <i1> [#uses=1]
|
|
br i1 %tmp.1, label %no_exit, label %loopexit
|
|
|
|
loopexit: ; preds = %no_exit
|
|
ret i32 %i1
|
|
}
|
|
|
|
define i16 @cast_chrec_test() {
|
|
; <label>:0
|
|
br label %Loop
|
|
|
|
Loop: ; preds = %Loop, %0
|
|
%A1 = phi i32 [ 0, %0 ], [ %A2, %Loop ] ; <i32> [#uses=2]
|
|
%B1 = trunc i32 %A1 to i16 ; <i16> [#uses=2]
|
|
%A2 = add i32 %A1, 1 ; <i32> [#uses=1]
|
|
%C = icmp eq i16 %B1, 1000 ; <i1> [#uses=1]
|
|
br i1 %C, label %Out, label %Loop
|
|
|
|
Out: ; preds = %Loop
|
|
ret i16 %B1
|
|
}
|
|
|
|
define i32 @linear_div_fold() {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop: ; preds = %loop, %entry
|
|
%i = phi i32 [ 4, %entry ], [ %i.next, %loop ] ; <i32> [#uses=3]
|
|
%i.next = add i32 %i, 8 ; <i32> [#uses=1]
|
|
%RV = udiv i32 %i, 2 ; <i32> [#uses=1]
|
|
%c = icmp ne i32 %i, 68 ; <i1> [#uses=1]
|
|
br i1 %c, label %loop, label %loopexit
|
|
|
|
loopexit: ; preds = %loop
|
|
ret i32 %RV
|
|
}
|