; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=tailcallelim -verify-dom-info -S | FileCheck %s
; the test was generated from the following C++ source:
;
; int zoo ( S p1 );
;
; int foo ( int count, S p1 ) {
; if ( count > 10 )
; return zoo(p1);
;
; // After TRE: temporarily variable created for passing byvalue parameter
; // p1 could be used when zoo(p1) is called.
; return foo(count+1, p1);
; }
; this test checks that value of ByValue operand AGG_TMP_I of call site foo()
; is copied into temporarily variable AGG_TMP_I1(byVal value holder) and
; later the value from AGG_TMP_I1 is copied into function argument P1 before
; new iteration started.
%struct.S = type { i32, i32, float, %struct.B }
%struct.B = type { i32, float }
; Function Attrs: uwtable
define dso_local i32 @_Z3fooi1S(i32 %count, %struct.S* nocapture readonly byval(%struct.S) align 8 %p1) local_unnamed_addr #0 {
; CHECK-LABEL: @_Z3fooi1S(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[AGG_TMP_I1:%.*]] = alloca [[STRUCT_S:%.*]], align 8
; CHECK-NEXT: [[AGG_TMP_I:%.*]] = alloca [[STRUCT_S]], align 8
; CHECK-NEXT: [[AGG_TMP14:%.*]] = alloca [[STRUCT_S]], align 8
; CHECK-NEXT: [[AGG_TMP:%.*]] = alloca [[STRUCT_S]], align 8
; CHECK-NEXT: [[AGG_TMP1:%.*]] = alloca [[STRUCT_S]], align 8
; CHECK-NEXT: br label [[TAILRECURSE:%.*]]
; CHECK: tailrecurse:
; CHECK-NEXT: [[COUNT_TR:%.*]] = phi i32 [ [[COUNT:%.*]], [[ENTRY:%.*]] ], [ [[ADD:%.*]], [[IF_END:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[COUNT_TR]], 10
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END]]
; CHECK: if.then:
; CHECK-NEXT: [[TMP0:%.*]] = bitcast %struct.S* [[AGG_TMP]] to i8*
; CHECK-NEXT: [[TMP1:%.*]] = bitcast %struct.S* [[P1:%.*]] to i8*
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) [[TMP0]], i8* nonnull align 8 dereferenceable(20) [[TMP1]], i64 20, i1 false)
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @_Z3zoo1S(%struct.S* nonnull byval(%struct.S) align 8 [[AGG_TMP]])
; CHECK-NEXT: br label [[RETURN:%.*]]
; CHECK: if.end:
; CHECK-NEXT: [[ADD]] = add nsw i32 [[COUNT_TR]], 1
; CHECK-NEXT: [[TMP2:%.*]] = bitcast %struct.S* [[AGG_TMP1]] to i8*
; CHECK-NEXT: [[TMP3:%.*]] = bitcast %struct.S* [[P1]] to i8*
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) [[TMP2]], i8* nonnull align 8 dereferenceable(20) [[TMP3]], i64 20, i1 false)
; CHECK-NEXT: [[AGG_TMP14_0__SROA_CAST:%.*]] = bitcast %struct.S* [[AGG_TMP14]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull [[AGG_TMP14_0__SROA_CAST]])
; CHECK-NEXT: [[TMP4:%.*]] = bitcast %struct.S* [[AGG_TMP_I]] to i8*
; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull [[TMP4]])
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) [[AGG_TMP14_0__SROA_CAST]], i8* nonnull align 8 dereferenceable(20) [[TMP2]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) [[TMP4]], i8* nonnull align 8 dereferenceable(20) [[AGG_TMP14_0__SROA_CAST]], i64 20, i1 false)
; CHECK-NEXT: [[TMP5:%.*]] = bitcast %struct.S* [[AGG_TMP_I1]] to i8*
; CHECK-NEXT: [[TMP6:%.*]] = bitcast %struct.S* [[AGG_TMP_I]] to i8*
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[TMP5]], i8* align 8 [[TMP6]], i64 20, i1 false)
; CHECK-NEXT: [[TMP7:%.*]] = bitcast %struct.S* [[P1]] to i8*
; CHECK-NEXT: [[TMP8:%.*]] = bitcast %struct.S* [[AGG_TMP_I1]] to i8*
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 [[TMP7]], i8* align 8 [[TMP8]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull [[AGG_TMP14_0__SROA_CAST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull [[TMP4]])
; CHECK-NEXT: br label [[TAILRECURSE]]
; CHECK: return:
; CHECK-NEXT: ret i32 [[CALL]]
;
entry:
%agg.tmp.i = alloca %struct.S, align 8
%agg.tmp14 = alloca %struct.S, align 8
%agg.tmp = alloca %struct.S, align 8
%agg.tmp1 = alloca %struct.S, align 8
%cmp = icmp sgt i32 %count, 10
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%0 = bitcast %struct.S* %agg.tmp to i8*
%1 = bitcast %struct.S* %p1 to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) %0, i8* nonnull align 8 dereferenceable(20) %1, i64 20, i1 false)
%call = call i32 @_Z3zoo1S(%struct.S* nonnull byval(%struct.S) align 8 %agg.tmp)
br label %return
if.end: ; preds = %entry
%add = add nsw i32 %count, 1
%2 = bitcast %struct.S* %agg.tmp1 to i8*
%3 = bitcast %struct.S* %p1 to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) %2, i8* nonnull align 8 dereferenceable(20) %3, i64 20, i1 false)
%agg.tmp14.0..sroa_cast = bitcast %struct.S* %agg.tmp14 to i8*
call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull %agg.tmp14.0..sroa_cast)
%4 = bitcast %struct.S* %agg.tmp.i to i8*
call void @llvm.lifetime.start.p0i8(i64 20, i8* nonnull %4)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) %agg.tmp14.0..sroa_cast, i8* nonnull align 8 dereferenceable(20) %2, i64 20, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 8 dereferenceable(20) %4, i8* nonnull align 8 dereferenceable(20) %agg.tmp14.0..sroa_cast, i64 20, i1 false)
%call.i = call i32 @_Z3fooi1S(i32 %add, %struct.S* nonnull byval(%struct.S) align 8 %agg.tmp.i)
call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull %agg.tmp14.0..sroa_cast)
call void @llvm.lifetime.end.p0i8(i64 20, i8* nonnull %4)
br label %return
return: ; preds = %if.end, %if.then
%retval.0 = phi i32 [ %call, %if.then ], [ %call.i, %if.end ]
ret i32 %retval.0
}
declare dso_local i32 @_Z3zoo1S(%struct.S* byval(%struct.S) align 8) local_unnamed_addr #1
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #2
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #2
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg) #2
attributes #0 = { uwtable }
attributes #1 = { uwtable }
attributes #2 = { argmemonly nounwind willreturn }