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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=memcpyopt < %s | FileCheck %s
declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)
declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)
define void @zero_size(ptr %p, ptr %p2) {
; CHECK-LABEL: @zero_size(
; CHECK-NEXT: ret void
;
call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %p2, i64 0, i1 false)
ret void
}
; The memcpy size is zero in a way that is non-trivial, but understood by AA.
define void @pr54983(ptr %p, ptr noalias %p2) {
; CHECK-LABEL: @pr54983(
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P:%.*]], i8 0, i64 1, i1 false)
; CHECK-NEXT: [[SIZE:%.*]] = shl i64 0, 0
; CHECK-NEXT: ret void
;
call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 1, i1 false)
%size = shl i64 0, 0
call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %p2, i64 %size, i1 false)
ret void
}
define void @pr64886(i64 %len, ptr noalias %p) {
; CHECK-LABEL: @pr64886(
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr inttoptr (i64 -1 to ptr), i8 0, i64 [[LEN:%.*]], i1 false)
; CHECK-NEXT: ret void
;
call void @llvm.memset.p0.i64(ptr inttoptr (i64 -1 to ptr), i8 0, i64 %len, i1 false)
call void @llvm.memcpy.p0.p0.i64(ptr inttoptr (i64 -1 to ptr), ptr %p, i64 poison, i1 false)
ret void
}
define void @pr98610(ptr %p, ptr noalias %p2) {
; CHECK-LABEL: @pr98610(
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P:%.*]], i8 0, i64 1, i1 false)
; CHECK-NEXT: [[ZERO_EXT:%.*]] = zext i32 0 to i64
; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[ZERO_EXT]], 1
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[P]], ptr [[P2:%.*]], i64 [[MUL]], i1 false)
; CHECK-NEXT: ret void
;
call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 1, i1 false)
%zero.ext = zext i32 0 to i64
%mul = mul i64 %zero.ext, 1
call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %p2, i64 %mul, i1 false)
ret void
}
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