| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -mergeicmps -verify-dom-info | FileCheck %s |
| target triple = "x86_64" |
| |
| ; First check that we try to from a memcmp. |
| define void @form_memcmp([2 x i64]* dereferenceable(16) %a, [2 x i64]* dereferenceable(16) %b) { |
| ; CHECK-LABEL: @form_memcmp( |
| ; CHECK-NEXT: bb0: |
| ; CHECK-NEXT: [[PTR_A0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A:%.*]], i64 0, i64 0 |
| ; CHECK-NEXT: [[PTR_A1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A]], i64 0, i64 1 |
| ; CHECK-NEXT: [[PTR_B0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[B:%.*]], i64 0, i64 0 |
| ; CHECK-NEXT: [[PTR_B1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[B]], i64 0, i64 1 |
| ; CHECK-NEXT: br label %"bb1+bb2" |
| ; CHECK: "bb1+bb2": |
| ; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[B]], i64 0, i64 0 |
| ; CHECK-NEXT: [[CSTR:%.*]] = bitcast i64* [[TMP0]] to i8* |
| ; CHECK-NEXT: [[CSTR1:%.*]] = bitcast i64* [[TMP1]] to i8* |
| ; CHECK-NEXT: [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 16) |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0 |
| ; CHECK-NEXT: br label [[BB3:%.*]] |
| ; CHECK: bb3: |
| ; CHECK-NEXT: ret void |
| ; |
| bb0: |
| %ptr_a0 = getelementptr inbounds [2 x i64], [2 x i64]* %a, i64 0, i64 0 |
| %ptr_a1 = getelementptr inbounds [2 x i64], [2 x i64]* %a, i64 0, i64 1 |
| %ptr_b0 = getelementptr inbounds [2 x i64], [2 x i64]* %b, i64 0, i64 0 |
| %ptr_b1 = getelementptr inbounds [2 x i64], [2 x i64]* %b, i64 0, i64 1 |
| br label %bb1 |
| |
| bb1: ; preds = %bb0 |
| %a0 = load i64, i64* %ptr_a0 |
| %b0 = load i64, i64* %ptr_b0 |
| %cond0 = icmp eq i64 %a0, %b0 |
| br i1 %cond0, label %bb2, label %bb3 |
| |
| bb2: ; preds = %bb1 |
| %a1 = load i64, i64* %ptr_a1 |
| %b1 = load i64, i64* %ptr_b1 |
| %cond1 = icmp eq i64 %a1, %b1 |
| br label %bb3 |
| |
| bb3: ; preds = %bb2, %bb1 |
| %necessary = phi i1 [ %cond1, %bb2 ], [ false, %bb1 ] |
| ret void |
| } |
| |
| ; We can't use memcmp between arbitrary addressesspaces |
| define void @no_memcmp([2 x i64] addrspace(11)* dereferenceable(16) %a, [2 x i64] addrspace(11)* dereferenceable(16) %b) { |
| ; CHECK-LABEL: @no_memcmp( |
| ; CHECK-NEXT: bb0: |
| ; CHECK-NEXT: [[PTR_A0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* [[A:%.*]], i64 0, i64 0 |
| ; CHECK-NEXT: [[PTR_A1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* [[A]], i64 0, i64 1 |
| ; CHECK-NEXT: [[PTR_B0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* [[B:%.*]], i64 0, i64 0 |
| ; CHECK-NEXT: [[PTR_B1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* [[B]], i64 0, i64 1 |
| ; CHECK-NEXT: br label [[BB1:%.*]] |
| ; CHECK: bb1: |
| ; CHECK-NEXT: [[A0:%.*]] = load i64, i64 addrspace(11)* [[PTR_A0]], align 4 |
| ; CHECK-NEXT: [[B0:%.*]] = load i64, i64 addrspace(11)* [[PTR_B0]], align 4 |
| ; CHECK-NEXT: [[COND0:%.*]] = icmp eq i64 [[A0]], [[B0]] |
| ; CHECK-NEXT: br i1 [[COND0]], label [[BB2:%.*]], label [[BB3:%.*]] |
| ; CHECK: bb2: |
| ; CHECK-NEXT: [[A1:%.*]] = load i64, i64 addrspace(11)* [[PTR_A1]], align 4 |
| ; CHECK-NEXT: [[B1:%.*]] = load i64, i64 addrspace(11)* [[PTR_B1]], align 4 |
| ; CHECK-NEXT: [[COND1:%.*]] = icmp eq i64 [[A1]], [[B1]] |
| ; CHECK-NEXT: br label [[BB3]] |
| ; CHECK: bb3: |
| ; CHECK-NEXT: [[NECESSARY:%.*]] = phi i1 [ [[COND1]], [[BB2]] ], [ false, [[BB1]] ] |
| ; CHECK-NEXT: ret void |
| ; |
| bb0: |
| %ptr_a0 = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* %a, i64 0, i64 0 |
| %ptr_a1 = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* %a, i64 0, i64 1 |
| %ptr_b0 = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* %b, i64 0, i64 0 |
| %ptr_b1 = getelementptr inbounds [2 x i64], [2 x i64] addrspace(11)* %b, i64 0, i64 1 |
| br label %bb1 |
| |
| bb1: ; preds = %bb0 |
| %a0 = load i64, i64 addrspace(11)* %ptr_a0 |
| %b0 = load i64, i64 addrspace(11)* %ptr_b0 |
| %cond0 = icmp eq i64 %a0, %b0 |
| br i1 %cond0, label %bb2, label %bb3 |
| |
| bb2: ; preds = %bb1 |
| %a1 = load i64, i64 addrspace(11)* %ptr_a1 |
| %b1 = load i64, i64 addrspace(11)* %ptr_b1 |
| %cond1 = icmp eq i64 %a1, %b1 |
| br label %bb3 |
| |
| bb3: ; preds = %bb2, %bb1 |
| %necessary = phi i1 [ %cond1, %bb2 ], [ false, %bb1 ] |
| ret void |
| } |