; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
; 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, ptr nocapture readonly byval(%struct.S) align 8 %p1) local_unnamed_addr #0 {
; CHECK-LABEL: define {{[^@]+}}@_Z3fooi1S
; CHECK-SAME: (i32 [[COUNT:%.*]], ptr nocapture byval([[STRUCT_S:%.*]]) align 8 [[P1:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
; 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: call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) [[AGG_TMP]], ptr nonnull align 8 dereferenceable(20) [[P1]], i64 20, i1 false)
; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @_Z3zoo1S(ptr 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: call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) [[AGG_TMP1]], ptr nonnull align 8 dereferenceable(20) [[P1]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 20, ptr nonnull [[AGG_TMP14]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 20, ptr nonnull [[AGG_TMP_I]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) [[AGG_TMP14]], ptr nonnull align 8 dereferenceable(20) [[AGG_TMP1]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) [[AGG_TMP_I]], ptr nonnull align 8 dereferenceable(20) [[AGG_TMP14]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[AGG_TMP_I1]], ptr align 8 [[AGG_TMP_I]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[P1]], ptr align 8 [[AGG_TMP_I1]], i64 20, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 20, ptr nonnull [[AGG_TMP14]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 20, ptr nonnull [[AGG_TMP_I]])
; 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
call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) %agg.tmp, ptr nonnull align 8 dereferenceable(20) %p1, i64 20, i1 false)
%call = call i32 @_Z3zoo1S(ptr nonnull byval(%struct.S) align 8 %agg.tmp)
br label %return
if.end: ; preds = %entry
%add = add nsw i32 %count, 1
call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) %agg.tmp1, ptr nonnull align 8 dereferenceable(20) %p1, i64 20, i1 false)
call void @llvm.lifetime.start.p0(i64 20, ptr nonnull %agg.tmp14)
call void @llvm.lifetime.start.p0(i64 20, ptr nonnull %agg.tmp.i)
call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) %agg.tmp14, ptr nonnull align 8 dereferenceable(20) %agg.tmp1, i64 20, i1 false)
call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 8 dereferenceable(20) %agg.tmp.i, ptr nonnull align 8 dereferenceable(20) %agg.tmp14, i64 20, i1 false)
%call.i = call i32 @_Z3fooi1S(i32 %add, ptr nonnull byval(%struct.S) align 8 %agg.tmp.i)
call void @llvm.lifetime.end.p0(i64 20, ptr nonnull %agg.tmp14)
call void @llvm.lifetime.end.p0(i64 20, ptr nonnull %agg.tmp.i)
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(ptr byval(%struct.S) align 8) local_unnamed_addr #1
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2
attributes #0 = { uwtable }
attributes #1 = { uwtable }
attributes #2 = { argmemonly nounwind willreturn }
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