llvm-6502/test/Transforms/InstCombine/addnegneg.ll
Chris Lattner dd12f96c5e Fold (-x + -y) -> -(x+y) which promotes better association, fixing
the second half of PR2047


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47244 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-17 21:03:36 +00:00

13 lines
341 B
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep { sub } | count 1
; PR2047
define i32 @l(i32 %a, i32 %b, i32 %c, i32 %d) {
entry:
%b.neg = sub i32 0, %b ; <i32> [#uses=1]
%c.neg = sub i32 0, %c ; <i32> [#uses=1]
%sub4 = add i32 %c.neg, %b.neg ; <i32> [#uses=1]
%sub6 = add i32 %sub4, %d ; <i32> [#uses=1]
ret i32 %sub6
}