; LLVM IR from drohmer/cgp :: library/cgp/06_mat/mat4/mat4.ll (ZN3cgp12matrix_stackIfLi4ELi4EE10build_zeroEv)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"struct.cgp::matrix_stack" = type { %"struct.cgp::numarray_stack" }
%"struct.cgp::numarray_stack" = type { %"struct.cgp::numarray_stack.0", %"struct.cgp::numarray_stack.0", %"struct.cgp::numarray_stack.0", %"struct.cgp::numarray_stack.0" }
%"struct.cgp::numarray_stack.0" = type { float, float, float, float }
%"class.std::initializer_list" = type { ptr, i64 }

@constinit.6 = external hidden constant [16 x float], align 4

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3cgp12matrix_stackIfLi4ELi4EE10build_zeroEv(ptr dead_on_unwind noalias writable sret(%"struct.cgp::matrix_stack") align 4 %0) #3 align 2 {
  %2 = alloca %"class.std::initializer_list", align 8
  %3 = alloca [16 x float], align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 64, ptr %3) #4
  call void @llvm.memset.p0.i64(ptr align 4 %3, i8 0, i64 64, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %3, ptr align 4 @constinit.6, i64 64, i1 false), !tbaa.struct !5
  %4 = getelementptr inbounds %"class.std::initializer_list", ptr %2, i32 0, i32 0
  store ptr %3, ptr %4, align 8, !tbaa !9
  %5 = getelementptr inbounds %"class.std::initializer_list", ptr %2, i32 0, i32 1
  store i64 16, ptr %5, align 8, !tbaa !13
  call void @_ZN3cgp12matrix_stackIfLi4ELi4EEC1ERKSt16initializer_listIfE(ptr noundef nonnull align 4 dereferenceable(64) %0, ptr noundef nonnull align 8 dereferenceable(16) %2)
  call void @llvm.lifetime.end.p0(i64 64, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #4
  ret void
}

declare void @_ZN3cgp12matrix_stackIfLi4ELi4EEC1ERKSt16initializer_listIfE(ptr, ptr)

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #4 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{i64 0, i64 64, !6}
!6 = !{!7, !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSSt16initializer_listIfE", !11, i64 0, !12, i64 8}
!11 = !{!"any pointer", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!10, !12, i64 8}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"struct.cgp::matrix_stack" = type { %"struct.cgp::numarray_stack" }
%"struct.cgp::numarray_stack" = type { %"struct.cgp::numarray_stack.0", %"struct.cgp::numarray_stack.0", %"struct.cgp::numarray_stack.0", %"struct.cgp::numarray_stack.0" }
%"struct.cgp::numarray_stack.0" = type { float, float, float, float }
%"class.std::initializer_list" = type { ptr, i64 }

@constinit.6 = external hidden local_unnamed_addr constant [16 x float], align 4

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3cgp12matrix_stackIfLi4ELi4EE10build_zeroEv(ptr dead_on_unwind noalias writable sret(%"struct.cgp::matrix_stack") align 4 %0) local_unnamed_addr #2 align 2 {
  %2 = alloca %"class.std::initializer_list", align 8
  %3 = alloca [16 x float], align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 64, ptr nonnull %3) #3
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(64) %3, ptr noundef nonnull align 4 dereferenceable(64) @constinit.6, i64 64, i1 false), !tbaa.struct !5
  store ptr %3, ptr %2, align 8, !tbaa !9
  %4 = getelementptr inbounds i8, ptr %2, i64 8
  store i64 16, ptr %4, align 8, !tbaa !13
  call void @_ZN3cgp12matrix_stackIfLi4ELi4EEC1ERKSt16initializer_listIfE(ptr noundef nonnull align 4 dereferenceable(64) %0, ptr noundef nonnull align 8 dereferenceable(16) %2)
  call void @llvm.lifetime.end.p0(i64 64, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %2) #3
  ret void
}

declare void @_ZN3cgp12matrix_stackIfLi4ELi4EEC1ERKSt16initializer_listIfE(ptr, ptr) local_unnamed_addr

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{i64 0, i64 64, !6}
!6 = !{!7, !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTSSt16initializer_listIfE", !11, i64 0, !12, i64 8}
!11 = !{!"any pointer", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!10, !12, i64 8}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,MemCpyOptPass