diff options
| -rw-r--r-- | llvm/test/Transforms/InstCombine/overflow_to_sat.ll | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/overflow_to_sat.ll b/llvm/test/Transforms/InstCombine/overflow_to_sat.ll index ddafc43e89f..12ee430ecfc 100644 --- a/llvm/test/Transforms/InstCombine/overflow_to_sat.ll +++ b/llvm/test/Transforms/InstCombine/overflow_to_sat.ll @@ -410,6 +410,44 @@ define i8 @ssub_x_le_max(i8 %x, i8 %y) { ret i8 %r } +define i8 @ssub_x_lt2_min(i8 %x, i8 %y) { +; CHECK-LABEL: @ssub_x_lt2_min( +; CHECK-NEXT: [[AO:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) +; CHECK-NEXT: [[O:%.*]] = extractvalue { i8, i1 } [[AO]], 1 +; CHECK-NEXT: [[A:%.*]] = extractvalue { i8, i1 } [[AO]], 0 +; CHECK-NEXT: [[C:%.*]] = icmp slt i8 [[X]], -1 +; CHECK-NEXT: [[S:%.*]] = select i1 [[C]], i8 127, i8 -128 +; CHECK-NEXT: [[R:%.*]] = select i1 [[O]], i8 [[S]], i8 [[A]] +; CHECK-NEXT: ret i8 [[R]] +; + %ao = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %x, i8 %y) + %o = extractvalue { i8, i1 } %ao, 1 + %a = extractvalue { i8, i1 } %ao, 0 + %c = icmp slt i8 %x, -1 + %s = select i1 %c, i8 127, i8 -128 + %r = select i1 %o, i8 %s, i8 %a + ret i8 %r +} + +define i8 @ssub_x_lt2_max(i8 %x, i8 %y) { +; CHECK-LABEL: @ssub_x_lt2_max( +; CHECK-NEXT: [[AO:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) +; CHECK-NEXT: [[O:%.*]] = extractvalue { i8, i1 } [[AO]], 1 +; CHECK-NEXT: [[A:%.*]] = extractvalue { i8, i1 } [[AO]], 0 +; CHECK-NEXT: [[C:%.*]] = icmp slt i8 [[X]], -1 +; CHECK-NEXT: [[S:%.*]] = select i1 [[C]], i8 -128, i8 127 +; CHECK-NEXT: [[R:%.*]] = select i1 [[O]], i8 [[S]], i8 [[A]] +; CHECK-NEXT: ret i8 [[R]] +; + %ao = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %x, i8 %y) + %o = extractvalue { i8, i1 } %ao, 1 + %a = extractvalue { i8, i1 } %ao, 0 + %c = icmp slt i8 %x, -1 + %s = select i1 %c, i8 -128, i8 127 + %r = select i1 %o, i8 %s, i8 %a + ret i8 %r +} + define i8 @ssub_x_gt_min(i8 %x, i8 %y) { ; CHECK-LABEL: @ssub_x_gt_min( ; CHECK-NEXT: [[AO:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) @@ -486,6 +524,44 @@ define i8 @ssub_x_ge_max(i8 %x, i8 %y) { ret i8 %r } +define i8 @ssub_x_gt2_min(i8 %x, i8 %y) { +; CHECK-LABEL: @ssub_x_gt2_min( +; CHECK-NEXT: [[AO:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) +; CHECK-NEXT: [[O:%.*]] = extractvalue { i8, i1 } [[AO]], 1 +; CHECK-NEXT: [[A:%.*]] = extractvalue { i8, i1 } [[AO]], 0 +; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[X]], -2 +; CHECK-NEXT: [[S:%.*]] = select i1 [[C]], i8 127, i8 -128 +; CHECK-NEXT: [[R:%.*]] = select i1 [[O]], i8 [[S]], i8 [[A]] +; CHECK-NEXT: ret i8 [[R]] +; + %ao = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %x, i8 %y) + %o = extractvalue { i8, i1 } %ao, 1 + %a = extractvalue { i8, i1 } %ao, 0 + %c = icmp sgt i8 %x, -2 + %s = select i1 %c, i8 127, i8 -128 + %r = select i1 %o, i8 %s, i8 %a + ret i8 %r +} + +define i8 @ssub_x_gt2_max(i8 %x, i8 %y) { +; CHECK-LABEL: @ssub_x_gt2_max( +; CHECK-NEXT: [[AO:%.*]] = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 [[X:%.*]], i8 [[Y:%.*]]) +; CHECK-NEXT: [[O:%.*]] = extractvalue { i8, i1 } [[AO]], 1 +; CHECK-NEXT: [[A:%.*]] = extractvalue { i8, i1 } [[AO]], 0 +; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[X]], -2 +; CHECK-NEXT: [[S:%.*]] = select i1 [[C]], i8 -128, i8 127 +; CHECK-NEXT: [[R:%.*]] = select i1 [[O]], i8 [[S]], i8 [[A]] +; CHECK-NEXT: ret i8 [[R]] +; + %ao = tail call { i8, i1 } @llvm.ssub.with.overflow.i8(i8 %x, i8 %y) + %o = extractvalue { i8, i1 } %ao, 1 + %a = extractvalue { i8, i1 } %ao, 0 + %c = icmp sgt i8 %x, -2 + %s = select i1 %c, i8 -128, i8 127 + %r = select i1 %o, i8 %s, i8 %a + ret i8 %r +} + define i8 @ssub_y_lt_min(i8 %x, i8 %y) { ; CHECK-LABEL: @ssub_y_lt_min( |
