Improve codegen for select's:

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

1 files changed, 0 insertions, 16 deletions

diff --git a/test/CodeGen/Thumb2/thumb2-teq2.ll b/test/CodeGen/Thumb2/thumb2-teq2.ll
index cdd3489c50..8acae9090f 100644
--- a/test/CodeGen/Thumb2/thumb2-teq2.ll
+++ b/test/CodeGen/Thumb2/thumb2-teq2.ll
@@ -3,14 +3,6 @@
 ; These tests implicitly depend on 'movs r0, #0' being rematerialized below the
 ; tst as 'mov.w r0, #0'. So far, that requires physreg joining.
 
-define i1 @f1(i32 %a, i32 %b) {
-; CHECK: f1
-; CHECK: teq.w  r0, r1
-    %tmp = xor i32 %a, %b
-    %tmp1 = icmp ne i32 %tmp, 0
-    ret i1 %tmp1
-}
-
 define i1 @f2(i32 %a, i32 %b) {
 ; CHECK: f2
 ; CHECK: teq.w r0, r1
@@ -19,14 +11,6 @@ define i1 @f2(i32 %a, i32 %b) {
     ret i1 %tmp1
 }
 
-define i1 @f3(i32 %a, i32 %b) {
-; CHECK: f3
-; CHECK: teq.w  r0, r1
-    %tmp = xor i32 %a, %b
-    %tmp1 = icmp ne i32 0, %tmp
-    ret i1 %tmp1
-}
-
 define i1 @f4(i32 %a, i32 %b) {
 ; CHECK: f4
 ; CHECK: teq.w  r0, r1