diff options
Diffstat (limited to 'llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll b/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll index 640a95b05616..070609228958 100644 --- a/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll +++ b/llvm/test/Transforms/InstCombine/icmp-and-lowbit-mask.ll @@ -453,6 +453,24 @@ define i1 @src_is_notmask_shl(i8 %x_in, i8 %y, i1 %cond) { ret i1 %r } +define i1 @src_is_notmask_x_xor_neg_x(i8 %x_in, i8 %y, i1 %cond) { +; CHECK-LABEL: @src_is_notmask_x_xor_neg_x( +; CHECK-NEXT: [[X:%.*]] = xor i8 [[X_IN:%.*]], 123 +; CHECK-NEXT: [[NEG_Y:%.*]] = add i8 [[Y:%.*]], -1 +; CHECK-NEXT: [[NOTMASK0:%.*]] = xor i8 [[NEG_Y]], [[Y]] +; CHECK-NEXT: [[TMP3:%.*]] = select i1 [[COND:%.*]], i8 [[NOTMASK0]], i8 7 +; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[X]], [[TMP3]] +; CHECK-NEXT: ret i1 [[R]] +; + %x = xor i8 %x_in, 123 + %neg_y = sub i8 0, %y + %nmask0 = xor i8 %y, %neg_y + %notmask = select i1 %cond, i8 %nmask0, i8 -8 + %and = and i8 %x, %notmask + %r = icmp eq i8 %and, 0 + ret i1 %r +} + define i1 @src_is_notmask_shl_fail_multiuse_invert(i8 %x_in, i8 %y, i1 %cond) { ; CHECK-LABEL: @src_is_notmask_shl_fail_multiuse_invert( ; CHECK-NEXT: [[X:%.*]] = xor i8 [[X_IN:%.*]], 122 |