mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 16:31:16 +00:00
e721f5c8d3
if (x != 0) x = 1
if (x == 1) x = 1
Previous codegen looks like this:
mov r1, r0
cmp r1, #1
mov r0, #0
moveq r0, #1
The naive lowering select between two different values. It should recognize the
test is equality test so it's more a conditional move rather than a select:
cmp r0, #1
movne r0, #0
rdar://9758317
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135017 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.1 KiB
LLVM
50 lines
1.1 KiB
LLVM
; RUN: llc < %s -march=thumb -mattr=+thumb2 -join-physregs | FileCheck %s
|
|
|
|
; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
|
|
; tst as 'mov.w r0, #0'. So far, that requires physreg joining.
|
|
|
|
; 0x000000bb = 187
|
|
define i1 @f2(i32 %a) {
|
|
%tmp = and i32 %a, 187
|
|
%tmp1 = icmp eq i32 0, %tmp
|
|
ret i1 %tmp1
|
|
}
|
|
; CHECK: f2:
|
|
; CHECK: tst.w r0, #187
|
|
|
|
; 0x00aa00aa = 11141290
|
|
define i1 @f3(i32 %a) {
|
|
%tmp = and i32 %a, 11141290
|
|
%tmp1 = icmp eq i32 %tmp, 0
|
|
ret i1 %tmp1
|
|
}
|
|
; CHECK: f3:
|
|
; CHECK: tst.w r0, #11141290
|
|
|
|
; 0xcc00cc00 = 3422604288
|
|
define i1 @f6(i32 %a) {
|
|
%tmp = and i32 %a, 3422604288
|
|
%tmp1 = icmp eq i32 0, %tmp
|
|
ret i1 %tmp1
|
|
}
|
|
; CHECK: f6:
|
|
; CHECK: tst.w r0, #-872363008
|
|
|
|
; 0xdddddddd = 3722304989
|
|
define i1 @f7(i32 %a) {
|
|
%tmp = and i32 %a, 3722304989
|
|
%tmp1 = icmp eq i32 %tmp, 0
|
|
ret i1 %tmp1
|
|
}
|
|
; CHECK: f7:
|
|
; CHECK: tst.w r0, #-572662307
|
|
|
|
; 0x00110000 = 1114112
|
|
define i1 @f10(i32 %a) {
|
|
%tmp = and i32 %a, 1114112
|
|
%tmp1 = icmp eq i32 0, %tmp
|
|
ret i1 %tmp1
|
|
}
|
|
; CHECK: f10:
|
|
; CHECK: tst.w r0, #1114112
|