| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ;RUN: opt -S %s -indvars | FileCheck %s |
| |
| ; Provide legal integer types. |
| target datalayout = "n8:16:32:64" |
| |
| |
| define void @foo() #0 { |
| ; CHECK-LABEL: @foo( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[FOR_BODY:%.*]] |
| ; CHECK: for.body: |
| ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i32 [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: call void @bar(i32 [[INDVARS_IV]]) #1 |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i32 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[INDVARS_IV_NEXT]], 512 |
| ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END:%.*]] |
| ; CHECK: for.end: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %for.body |
| |
| for.body: ; preds = %entry, %for.body |
| %i.01 = phi i16 [ 0, %entry ], [ %inc, %for.body ] |
| %conv2 = sext i16 %i.01 to i32 |
| call void @bar(i32 %conv2) #1 |
| %inc = add i16 %i.01, 1 |
| %cmp = icmp slt i16 %inc, 512 |
| br i1 %cmp, label %for.body, label %for.end |
| |
| for.end: ; preds = %for.body |
| ret void |
| } |
| |
| ; Check that post-incrementing the backedge taken count does not overflow. |
| define i32 @postinc() #0 { |
| ; CHECK-LABEL: @postinc( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[DO_BODY:%.*]] |
| ; CHECK: do.body: |
| ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i32 [ [[INDVARS_IV_NEXT:%.*]], [[DO_BODY]] ], [ 0, [[ENTRY:%.*]] ] |
| ; CHECK-NEXT: call void @bar(i32 [[INDVARS_IV]]) #1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[INDVARS_IV]], 255 |
| ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i32 [[INDVARS_IV]], 1 |
| ; CHECK-NEXT: br i1 [[CMP]], label [[DO_END:%.*]], label [[DO_BODY]] |
| ; CHECK: do.end: |
| ; CHECK-NEXT: ret i32 0 |
| ; |
| entry: |
| br label %do.body |
| |
| do.body: ; preds = %do.body, %entry |
| %first.0 = phi i8 [ 0, %entry ], [ %inc, %do.body ] |
| %conv = zext i8 %first.0 to i32 |
| call void @bar(i32 %conv) #1 |
| %inc = add i8 %first.0, 1 |
| %cmp = icmp eq i8 %first.0, -1 |
| br i1 %cmp, label %do.end, label %do.body |
| |
| do.end: ; preds = %do.body |
| ret i32 0 |
| } |
| |
| declare void @bar(i32) |
| |
| attributes #0 = { nounwind uwtable } |
| attributes #1 = { nounwind } |