6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-21 23:17:16 +00:00
Code Issues Projects Releases Wiki Activity

InstCombine: Combine (add (and %a, %b) (or %a, %b)) to (add %a, %b)

Browse Source 
What follows bellow is a correctness proof of the transform using CVC3.

$ < t.cvc
A, B : BITVECTOR(32);

QUERY BVPLUS(32, A & B, A | B) = BVPLUS(32, A, B);

$ cvc3 < t.cvc
Valid.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215400 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2014-08-11 22:32:02 +00:00
parent 13f4476c55
commit e8be18e8a3
2 changed files with 63 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
test/Transforms/InstCombine/add2.ll
+40
View File
@@ -313,3 +313,43 @@ define i16 @add_cttz_2(i16 %a) {
ret i16 %b
}
!1 = metadata !{i16 0, i16 32}
define i32 @add_or_and(i32 %x, i32 %y) {
%or = or i32 %x, %y
%and = and i32 %x, %y
%add = add i32 %or, %and
ret i32 %add
; CHECK-LABEL: @add_or_and(
; CHECK-NEXT: add i32 %x, %y
; CHECK-NEXT: ret i32
}
define i32 @add_nsw_or_and(i32 %x, i32 %y) {
%or = or i32 %x, %y
%and = and i32 %x, %y
%add = add nsw i32 %or, %and
ret i32 %add
; CHECK-LABEL: @add_nsw_or_and(
; CHECK-NEXT: add nsw i32 %x, %y
; CHECK-NEXT: ret i32
}
define i32 @add_nuw_or_and(i32 %x, i32 %y) {
%or = or i32 %x, %y
%and = and i32 %x, %y
%add = add nuw i32 %or, %and
ret i32 %add
; CHECK-LABEL: @add_nuw_or_and(
; CHECK-NEXT: add nuw i32 %x, %y
; CHECK-NEXT: ret i32
}
define i32 @add_nuw_nsw_or_and(i32 %x, i32 %y) {
%or = or i32 %x, %y
%and = and i32 %x, %y
%add = add nsw nuw i32 %or, %and
ret i32 %add
; CHECK-LABEL: @add_nuw_nsw_or_and(
; CHECK-NEXT: add nuw nsw i32 %x, %y
; CHECK-NEXT: ret i32
}