6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

InstCombine: Implement X - A*-B -> X + A*B.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119984 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2010-11-22 20:31:27 +00:00
parent 28ef0a5719
commit 93f8455d73
3 changed files with 29 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
test/Transforms/InstCombine/sub.ll
View File

@@ -281,3 +281,23 @@ define i32 @test26(i32 %x) {
; CHECK-NEXT: ret i32
}
define i32 @test27(i32 %x, i32 %y) {
%mul = mul i32 %y, -8
%sub = sub i32 %x, %mul
ret i32 %sub
; CHECK: @test27
; CHECK-NEXT: shl i32 %y, 3
; CHECK-NEXT: add i32
; CHECK-NEXT: ret i32
}
define i32 @test28(i32 %x, i32 %y, i32 %z) {
%neg = sub i32 0, %z
%mul = mul i32 %neg, %y
%sub = sub i32 %x, %mul
ret i32 %sub
; CHECK: @test28
; CHECK-NEXT: mul i32 %z, %y
; CHECK-NEXT: add i32
; CHECK-NEXT: ret i32
}