| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -O1 -S < %s | FileCheck %s --check-prefix=OLDPM |
| ; RUN: opt -passes='default<O1>' -S < %s | FileCheck %s --check-prefix=NEWPM |
| |
| ; Don't simplify unconditional branches from empty blocks in simplifyCFG |
| ; until late in the pipeline because it can destroy canonical loop structure. |
| |
| ; FIXME: The new pass manager is not limiting simplifycfg at any point in the pipeline, |
| ; so it performs a transformation before loop optimizations that is avoided in the old PM. |
| |
| define i1 @PR33605(i32 %a, i32 %b, i32* %c) { |
| ; OLDPM-LABEL: @PR33605( |
| ; OLDPM-NEXT: for.body: |
| ; OLDPM-NEXT: [[OR:%.*]] = or i32 [[B:%.*]], [[A:%.*]] |
| ; OLDPM-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 1 |
| ; OLDPM-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4 |
| ; OLDPM-NEXT: [[CMP:%.*]] = icmp eq i32 [[OR]], [[TMP0]] |
| ; OLDPM-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[IF_THEN:%.*]] |
| ; OLDPM: if.then: |
| ; OLDPM-NEXT: store i32 [[OR]], i32* [[ARRAYIDX]], align 4 |
| ; OLDPM-NEXT: tail call void @foo() |
| ; OLDPM-NEXT: br label [[IF_END]] |
| ; OLDPM: if.end: |
| ; OLDPM-NEXT: [[CHANGED_1_OFF0:%.*]] = phi i1 [ true, [[IF_THEN]] ], [ false, [[FOR_BODY:%.*]] ] |
| ; OLDPM-NEXT: [[TMP1:%.*]] = load i32, i32* [[C]], align 4 |
| ; OLDPM-NEXT: [[CMP_1:%.*]] = icmp eq i32 [[OR]], [[TMP1]] |
| ; OLDPM-NEXT: br i1 [[CMP_1]], label [[IF_END_1:%.*]], label [[IF_THEN_1:%.*]] |
| ; OLDPM: if.then.1: |
| ; OLDPM-NEXT: store i32 [[OR]], i32* [[C]], align 4 |
| ; OLDPM-NEXT: tail call void @foo() |
| ; OLDPM-NEXT: br label [[IF_END_1]] |
| ; OLDPM: if.end.1: |
| ; OLDPM-NEXT: [[CHANGED_1_OFF0_1:%.*]] = phi i1 [ true, [[IF_THEN_1]] ], [ [[CHANGED_1_OFF0]], [[IF_END]] ] |
| ; OLDPM-NEXT: ret i1 [[CHANGED_1_OFF0_1]] |
| ; |
| ; NEWPM-LABEL: @PR33605( |
| ; NEWPM-NEXT: entry: |
| ; NEWPM-NEXT: [[OR:%.*]] = or i32 [[B:%.*]], [[A:%.*]] |
| ; NEWPM-NEXT: br label [[FOR_COND_OUTER:%.*]] |
| ; NEWPM: for.cond.outer: |
| ; NEWPM-NEXT: [[I_0_PH:%.*]] = phi i32 [ [[DEC:%.*]], [[IF_THEN:%.*]] ], [ 2, [[ENTRY:%.*]] ] |
| ; NEWPM-NEXT: [[CHANGED_0_OFF0_PH:%.*]] = phi i1 [ true, [[IF_THEN]] ], [ false, [[ENTRY]] ] |
| ; NEWPM-NEXT: br label [[FOR_COND:%.*]] |
| ; NEWPM: for.cond: |
| ; NEWPM-NEXT: [[I_0:%.*]] = phi i32 [ [[DEC]], [[FOR_BODY:%.*]] ], [ [[I_0_PH]], [[FOR_COND_OUTER]] ] |
| ; NEWPM-NEXT: [[DEC]] = add nsw i32 [[I_0]], -1 |
| ; NEWPM-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[I_0]], 0 |
| ; NEWPM-NEXT: br i1 [[TOBOOL]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY]] |
| ; NEWPM: for.cond.cleanup: |
| ; NEWPM-NEXT: ret i1 [[CHANGED_0_OFF0_PH]] |
| ; NEWPM: for.body: |
| ; NEWPM-NEXT: [[IDXPROM:%.*]] = sext i32 [[DEC]] to i64 |
| ; NEWPM-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 [[IDXPROM]] |
| ; NEWPM-NEXT: [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4 |
| ; NEWPM-NEXT: [[CMP:%.*]] = icmp eq i32 [[OR]], [[TMP0]] |
| ; NEWPM-NEXT: br i1 [[CMP]], label [[FOR_COND]], label [[IF_THEN]] |
| ; NEWPM: if.then: |
| ; NEWPM-NEXT: store i32 [[OR]], i32* [[ARRAYIDX]], align 4 |
| ; NEWPM-NEXT: tail call void @foo() |
| ; NEWPM-NEXT: br label [[FOR_COND_OUTER]] |
| ; |
| 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, i32* %c, i64 %idxprom |
| %0 = load i32, i32* %arrayidx, align 4 |
| %cmp = icmp eq i32 %or, %0 |
| br i1 %cmp, label %if.end, label %if.then |
| |
| if.then: |
| store i32 %or, i32* %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() |
| |