| ; RUN: opt -basic-aa -loop-idiom < %s -S | FileCheck %s |
| target datalayout = "e-p:40:64:64:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" |
| |
| %struct.foo = type { i32, i32 } |
| %struct.foo1 = type { i32, i32, i32 } |
| %struct.foo2 = type { i32, i16, i16 } |
| |
| ;void bar1(foo_t *f, unsigned n) { |
| ; for (unsigned i = 0; i < n; ++i) { |
| ; f[i].a = 0; |
| ; f[i].b = 0; |
| ; } |
| ;} |
| define void @bar1(%struct.foo* %f, i32 %n) nounwind ssp { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| %a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0 |
| store i32 0, i32* %a, align 4 |
| %b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1 |
| store i32 0, i32* %b, align 4 |
| %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1 |
| %exitcond = icmp ne i32 %indvars.iv.next, %n |
| br i1 %exitcond, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| ; CHECK-LABEL: @bar1( |
| ; CHECK: call void @llvm.memset |
| ; CHECK-NOT: store |
| } |
| |
| ;void bar2(foo_t *f, unsigned n) { |
| ; for (unsigned i = 0; i < n; ++i) { |
| ; f[i].b = 0; |
| ; f[i].a = 0; |
| ; } |
| ;} |
| define void @bar2(%struct.foo* %f, i32 %n) nounwind ssp { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| %b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1 |
| store i32 0, i32* %b, align 4 |
| %a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0 |
| store i32 0, i32* %a, align 4 |
| %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1 |
| %exitcond = icmp ne i32 %indvars.iv.next, %n |
| br i1 %exitcond, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| ; CHECK-LABEL: @bar2( |
| ; CHECK: call void @llvm.memset |
| ; CHECK-NOT: store |
| } |
| |
| ;void bar3(foo_t *f, unsigned n) { |
| ; for (unsigned i = n; i > 0; --i) { |
| ; f[i].a = 0; |
| ; f[i].b = 0; |
| ; } |
| ;} |
| define void @bar3(%struct.foo* nocapture %f, i32 %n) nounwind ssp { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i32 [ %n, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| %a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0 |
| store i32 0, i32* %a, align 4 |
| %b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1 |
| store i32 0, i32* %b, align 4 |
| %dec = add i32 %indvars.iv, -1 |
| %cmp = icmp eq i32 %dec, 0 |
| %indvars.iv.next = add nsw i32 %indvars.iv, -1 |
| br i1 %cmp, label %for.end.loopexit, label %for.body |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| ; CHECK-LABEL: @bar3( |
| ; CHECK: call void @llvm.memset |
| ; CHECK-NOT: store |
| } |
| |
| ;void bar4(foo_t *f, unsigned n) { |
| ; for (unsigned i = 0; i < n; ++i) { |
| ; f[i].a = 0; |
| ; f[i].b = 1; |
| ; } |
| ;} |
| define void @bar4(%struct.foo* nocapture %f, i32 %n) nounwind ssp { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| %a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0 |
| store i32 0, i32* %a, align 4 |
| %b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1 |
| store i32 1, i32* %b, align 4 |
| %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1 |
| %exitcond = icmp ne i32 %indvars.iv.next, %n |
| br i1 %exitcond, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| ; CHECK-LABEL: @bar4( |
| ; CHECK-NOT: call void @llvm.memset |
| } |
| |
| ;void bar5(foo1_t *f, unsigned n) { |
| ; for (unsigned i = 0; i < n; ++i) { |
| ; f[i].a = 0; |
| ; f[i].b = 0; |
| ; } |
| ;} |
| define void @bar5(%struct.foo1* nocapture %f, i32 %n) nounwind ssp { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| %a = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i32 %indvars.iv, i32 0 |
| store i32 0, i32* %a, align 4 |
| %b = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i32 %indvars.iv, i32 1 |
| store i32 0, i32* %b, align 4 |
| %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1 |
| %exitcond = icmp ne i32 %indvars.iv.next, %n |
| br i1 %exitcond, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| ; CHECK-LABEL: @bar5( |
| ; CHECK-NOT: call void @llvm.memset |
| } |
| |
| ;void bar6(foo2_t *f, unsigned n) { |
| ; for (unsigned i = 0; i < n; ++i) { |
| ; f[i].a = 0; |
| ; f[i].b = 0; |
| ; f[i].c = 0; |
| ; } |
| ;} |
| define void @bar6(%struct.foo2* nocapture %f, i32 %n) nounwind ssp { |
| entry: |
| %cmp1 = icmp eq i32 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body.preheader |
| |
| for.body.preheader: ; preds = %entry |
| br label %for.body |
| |
| for.body: ; preds = %for.body.preheader, %for.body |
| %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| %a = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i32 %indvars.iv, i32 0 |
| store i32 0, i32* %a, align 4 |
| %b = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i32 %indvars.iv, i32 1 |
| store i16 0, i16* %b, align 4 |
| %c = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i32 %indvars.iv, i32 2 |
| store i16 0, i16* %c, align 2 |
| %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1 |
| %exitcond = icmp ne i32 %indvars.iv.next, %n |
| br i1 %exitcond, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %entry |
| ret void |
| ; CHECK-LABEL: @bar6( |
| ; CHECK: call void @llvm.memset |
| ; CHECK-NOT: store |
| } |