; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -S -passes=memcpyopt -verify-memoryssa | FileCheck %s target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64" declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind ; The resulting memset is only 4-byte aligned, despite containing ; a 16-byte aligned store in the middle. define void @foo(ptr %p) { ; CHECK-LABEL: @foo( ; CHECK-NEXT: [[A1:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 1 ; CHECK-NEXT: [[A2:%.*]] = getelementptr i32, ptr [[P]], i64 2 ; CHECK-NEXT: [[A3:%.*]] = getelementptr i32, ptr [[P]], i64 3 ; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[P]], i8 0, i64 16, i1 false) ; CHECK-NEXT: ret void ; store i32 0, ptr %p, align 4 %a1 = getelementptr i32, ptr %p, i64 1 store i32 0, ptr %a1, align 16 %a2 = getelementptr i32, ptr %p, i64 2 store i32 0, ptr %a2, align 4 %a3 = getelementptr i32, ptr %p, i64 3 store i32 0, ptr %a3, align 4 ret void } ; Replacing %a8 with %a4 in the memset requires boosting the alignment of %a4. define void @bar() { ; CHECK-LABEL: @bar( ; CHECK-NEXT: [[A4:%.*]] = alloca i32, align 8 ; CHECK-NEXT: [[A8:%.*]] = alloca i32, align 8 ; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 8 [[A4]], i8 0, i64 4, i1 false) ; CHECK-NEXT: ret void ; %a4 = alloca i32, align 4 %a8 = alloca i32, align 8 call void @llvm.memset.p0.i64(ptr align 8 %a8, i8 0, i64 4, i1 false) call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a4, ptr align 4 %a8, i64 4, i1 false) ret void }