| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -O1 -S < %s | FileCheck %s |
| ; RUN: opt -passes='default<O1>' -S < %s | FileCheck %s |
| |
| ; Don't simplify unconditional branches from empty blocks in simplifyCFG |
| ; until late in the pipeline because it can destroy canonical loop structure. |
| |
| define i1 @PR33605(i32 %a, i32 %b, ptr %c) { |
| ; CHECK-LABEL: @PR33605( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[OR:%.*]] = or i32 [[B:%.*]], [[A:%.*]] |
| ; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[C:%.*]], i64 1 |
| ; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[OR]], [[TMP0]] |
| ; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]] |
| ; CHECK: if.then: |
| ; CHECK-NEXT: store i32 [[OR]], ptr [[ARRAYIDX]], align 4 |
| ; CHECK-NEXT: tail call void @foo() |
| ; CHECK-NEXT: br label [[IF_END]] |
| ; CHECK: if.end: |
| ; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[C]], align 4 |
| ; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i32 [[OR]], [[TMP1]] |
| ; CHECK-NEXT: br i1 [[CMP_1]], label [[IF_END_1:%.*]], label [[IF_THEN_1:%.*]] |
| ; CHECK: if.then.1: |
| ; CHECK-NEXT: store i32 [[OR]], ptr [[C]], align 4 |
| ; CHECK-NEXT: tail call void @foo() |
| ; CHECK-NEXT: br label [[IF_END_1]] |
| ; CHECK: if.end.1: |
| ; CHECK-NEXT: [[CHANGED_1_OFF0_1:%.*]] = phi i1 [ true, [[IF_THEN_1]] ], [ [[CMP]], [[IF_END]] ] |
| ; CHECK-NEXT: ret i1 [[CHANGED_1_OFF0_1]] |
| ; |
| entry: |
| br label %for.cond |
| |
| for.cond: |
| %i.0 = phi i32 [ 2, %entry ], [ %dec, %if.end ] |
| %changed.0.off0 = phi i1 [ false, %entry ], [ %changed.1.off0, %if.end ] |
| %dec = add nsw i32 %i.0, -1 |
| %tobool = icmp eq i32 %i.0, 0 |
| br i1 %tobool, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| %changed.0.off0.lcssa = phi i1 [ %changed.0.off0, %for.cond ] |
| ret i1 %changed.0.off0.lcssa |
| |
| for.body: |
| %or = or i32 %a, %b |
| %idxprom = sext i32 %dec to i64 |
| %arrayidx = getelementptr inbounds i32, ptr %c, i64 %idxprom |
| %0 = load i32, ptr %arrayidx, align 4 |
| %cmp = icmp eq i32 %or, %0 |
| br i1 %cmp, label %if.end, label %if.then |
| |
| if.then: |
| store i32 %or, ptr %arrayidx, align 4 |
| call void @foo() |
| br label %if.end |
| |
| if.end: |
| %changed.1.off0 = phi i1 [ true, %if.then ], [ %changed.0.off0, %for.body ] |
| br label %for.cond |
| } |
| |
| declare void @foo() |
| |
| ; PR34603 - https://bugs.llvm.org/show_bug.cgi?id=34603 |
| ; We should have a select of doubles, not a select of double pointers. |
| ; SimplifyCFG should not flatten this before early-cse has a chance to eliminate redundant ops. |
| |
| define double @max_of_loads(ptr %x, ptr %y, i64 %i) { |
| ; CHECK-LABEL: @max_of_loads( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[XI_PTR:%.*]] = getelementptr double, ptr [[X:%.*]], i64 [[I:%.*]] |
| ; CHECK-NEXT: [[YI_PTR:%.*]] = getelementptr double, ptr [[Y:%.*]], i64 [[I]] |
| ; CHECK-NEXT: [[XI:%.*]] = load double, ptr [[XI_PTR]], align 8 |
| ; CHECK-NEXT: [[YI:%.*]] = load double, ptr [[YI_PTR]], align 8 |
| ; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[XI]], [[YI]] |
| ; CHECK-NEXT: [[XI_YI:%.*]] = select i1 [[CMP]], double [[XI]], double [[YI]] |
| ; CHECK-NEXT: ret double [[XI_YI]] |
| ; |
| entry: |
| %xi_ptr = getelementptr double, ptr %x, i64 %i |
| %yi_ptr = getelementptr double, ptr %y, i64 %i |
| %xi = load double, ptr %xi_ptr |
| %yi = load double, ptr %yi_ptr |
| %cmp = fcmp ogt double %xi, %yi |
| br i1 %cmp, label %if, label %else |
| |
| if: |
| %xi_ptr_again = getelementptr double, ptr %x, i64 %i |
| %xi_again = load double, ptr %xi_ptr_again |
| br label %end |
| |
| else: |
| %yi_ptr_again = getelementptr double, ptr %y, i64 %i |
| %yi_again = load double, ptr %yi_ptr_again |
| br label %end |
| |
| end: |
| %max = phi double [ %xi_again, %if ], [ %yi_again, %else ] |
| ret double %max |
| } |
| |
| define i1 @PR58313(i1 %lhs, i1 %rhs) { |
| ; CHECK-LABEL: @PR58313( |
| ; CHECK-NEXT: andandend: |
| ; CHECK-NEXT: [[SPEC_SELECT:%.*]] = xor i1 [[LHS:%.*]], [[RHS:%.*]] |
| ; CHECK-NEXT: ret i1 [[SPEC_SELECT]] |
| ; |
| andandend: |
| %0 = xor i1 %rhs, true |
| %andandval = select i1 %lhs, i1 %0, i1 false |
| br i1 %andandval, label %ororend, label %oror |
| |
| oror: |
| %1 = xor i1 %lhs, true |
| %andandval3 = select i1 %1, i1 %rhs, i1 false |
| br label %ororend |
| |
| ororend: |
| %ororval = phi i1 [ true, %andandend ], [ %andandval3, %oror ] |
| ret i1 %ororval |
| } |
| |