mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
4e8a98519e
casted induction variables in cases where the cast isn't foldable. It ended up being a pessimization in many cases. This could be fixed, but it would require a bunch of complicated code in IVUsers' clients. The advantages of this approach aren't visible enough to justify it at this time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73706 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
766 B
LLVM
27 lines
766 B
LLVM
; RUN: llvm-as < %s | opt -indvars | llvm-dis > %t
|
|
; RUN: not grep trunc %t
|
|
; RUN: grep and %t | count 1
|
|
|
|
; Indvars should do the IV arithmetic in the canonical IV type (i64),
|
|
; and only use one truncation.
|
|
|
|
define void @foo(i64* %A, i64* %B, i64 %n, i64 %a, i64 %s) nounwind {
|
|
entry:
|
|
%t0 = icmp sgt i64 %n, 0 ; <i1> [#uses=1]
|
|
br i1 %t0, label %bb.preheader, label %return
|
|
|
|
bb.preheader: ; preds = %entry
|
|
br label %bb
|
|
|
|
bb: ; preds = %bb, %bb.preheader
|
|
%i.01 = phi i64 [ %t6, %bb ], [ %a, %bb.preheader ] ; <i64> [#uses=3]
|
|
%t1 = and i64 %i.01, 255 ; <i64> [#uses=1]
|
|
%t2 = getelementptr i64* %A, i64 %t1 ; <i64*> [#uses=1]
|
|
store i64 %i.01, i64* %t2, align 8
|
|
%t6 = add i64 %i.01, %s ; <i64> [#uses=1]
|
|
br label %bb
|
|
|
|
return: ; preds = %entry
|
|
ret void
|
|
}
|