mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-06 23:32:27 +00:00
51 lines
1.1 KiB
LLVM
51 lines
1.1 KiB
LLVM
|
; RUN: opt -S -instcombine < %s | FileCheck %s
|
||
|
|
|
||
|
|
; rdar://12182093
|
||
|
|
|
||
|
|
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-apple-macosx10.8.0"
|
||
|
|
|
||
|
|
; CHECK: @udiv400
|
||
|
|
; CHECK: udiv i32 %x, 400
|
||
|
|
; CHECK: ret
|
||
|
|
define i32 @udiv400(i32 %x) {
|
||
|
|
entry:
|
||
|
|
%div = lshr i32 %x, 2
|
||
|
|
%div1 = udiv i32 %div, 100
|
||
|
|
ret i32 %div1
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: @sdiv400
|
||
|
|
; CHECK: sdiv i32 %x, 400
|
||
|
|
; CHECK: ret
|
||
|
|
define i32 @sdiv400(i32 %x) {
|
||
|
|
entry:
|
||
|
|
%div = ashr i32 %x, 2
|
||
|
|
%div1 = sdiv i32 %div, 100
|
||
|
|
ret i32 %div1
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: @udiv400_no
|
||
|
|
; CHECK: ashr
|
||
|
|
; CHECK: div
|
||
|
|
; CHECK: ret
|
||
|
|
define i32 @udiv400_no(i32 %x) {
|
||
|
|
entry:
|
||
|
|
%div = ashr i32 %x, 2
|
||
|
|
%div1 = udiv i32 %div, 100
|
||
|
|
ret i32 %div1
|
||
|
|
}
|
||
|
|
|
||
|
|
; CHECK: @sdiv400_yes
|
||
|
|
; CHECK: udiv i32 %x, 400
|
||
|
|
; CHECK: ret
|
||
|
|
define i32 @sdiv400_yes(i32 %x) {
|
||
|
|
entry:
|
||
|
|
%div = lshr i32 %x, 2
|
||
|
|
; The sign bits of both operands are zero (i.e. we can prove they are
|
||
|
|
; unsigned inputs), turn this into a udiv.
|
||
|
|
; Next, optimize this just like sdiv.
|
||
|
|
%div1 = sdiv i32 %div, 100
|
||
|
|
ret i32 %div1
|
||
|
|
}
|