43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
; RUN: opt < %s -S -gvn-sink | FileCheck %s
|
|
|
|
; Because %tmp17 has flipped operands to its equivalents %tmp14 and %tmp7, we
|
|
; can't sink the zext as we'd need a shuffling PHI in between.
|
|
;
|
|
; Just sinking the zext isn't profitable, so ensure nothing is sunk.
|
|
|
|
; CHECK-LABEL: @hoge
|
|
; CHECK-NOT: bb18.gvnsink.split
|
|
define void @hoge() {
|
|
bb:
|
|
br i1 undef, label %bb4, label %bb11
|
|
|
|
bb4: ; preds = %bb3
|
|
br i1 undef, label %bb6, label %bb8
|
|
|
|
bb6: ; preds = %bb5
|
|
%tmp = zext i16 undef to i64
|
|
%tmp7 = add i64 %tmp, undef
|
|
br label %bb18
|
|
|
|
bb8: ; preds = %bb5
|
|
%tmp9 = zext i16 undef to i64
|
|
br label %bb18
|
|
|
|
bb11: ; preds = %bb10
|
|
br i1 undef, label %bb12, label %bb15
|
|
|
|
bb12: ; preds = %bb11
|
|
%tmp13 = zext i16 undef to i64
|
|
%tmp14 = add i64 %tmp13, undef
|
|
br label %bb18
|
|
|
|
bb15: ; preds = %bb11
|
|
%tmp16 = zext i16 undef to i64
|
|
%tmp17 = add i64 undef, %tmp16
|
|
br label %bb18
|
|
|
|
bb18: ; preds = %bb15, %bb12, %bb8, %bb6
|
|
%tmp19 = phi i64 [ %tmp7, %bb6 ], [ undef, %bb8 ], [ %tmp14, %bb12 ], [ %tmp17, %bb15 ]
|
|
unreachable
|
|
}
|